Gaia Data Release 1. Open cluster astrometry: performance, limitations, and future prospects
Journal
ASTRONOMY & ASTROPHYSICS
Date Issued
2017
Author(s)
Gaia Collaboration
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van Leeuwen, F.
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VALLENARI, Antonella
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Jordi, C.
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Lindegren, L.
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Bastian, U.
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Prusti, T.
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de Bruijne, J. H. J.
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Brown, A. G. A.
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Babusiaux, C.
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Bailer-Jones, C. A. L.
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González-Marcos, A.
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González-Núñez, J.
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González-Vidal, J. J.
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Granvik, M.
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Guerrier, A.
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Walton, N. A.
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Guillout, P.
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Guiraud, J.
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Gúrpide, A.
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Osinde, J.
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Carrasco, J. M.
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Gutiérrez-Sánchez, R.
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Guy, L. P.
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Haigron, R.
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Hatzidimitriou, D.
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Haywood, M.
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Heiter, U.
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Helmi, A.
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Aerts, C.
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Hobbs, D.
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Hofmann, W.
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CASTELLANI, Marco
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PANCINO, ELENA
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Holl, B.
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Holland, G.
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Hunt, J. A. S.
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Hypki, A.
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Icardi, V.
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Irwin, M.
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Jevardat de Fombelle, G.
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Jofré, P.
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Arenou, F.
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Charlot, P.
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Jonker, P. G.
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Biermann, M.
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Jorissen, A.
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Julbe, F.
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Karampelas, A.
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Kochoska, A.
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Kohley, R.
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Kolenberg, K.
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Kontizas, E.
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Koposov, S. E.
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Charnas, J.
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Kordopatis, G.
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Cropper, M.
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Pauwels, T.
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Koubsky, P.
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Krone-Martins, A.
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Kudryashova, M.
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Kull, I.
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Bachchan, R. K.
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Lacoste-Seris, F.
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LANZA, Antonino Francesco
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Chiavassa, A.
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Lavigne, J. -B.
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Le Poncin-Lafitte, C.
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Lebreton, Y.
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Petit, J. -M.
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DRIMMEL, Ronald
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Lebzelter, T.
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LECCIA, Silvio
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Leclerc, N.
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Lecoeur-Taibi, I.
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Lemaitre, V.
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Clotet, M.
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Lenhardt, H.
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Leroux, F.
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Liao, S.
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LICATA, ENRICO
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Recio-Blanco, A.
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Lindstrøm, H. E. P.
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Høg, E.
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Lister, T. A.
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Livanou, E.
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Lobel, A.
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Cocozza, G.
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Löffler, W.
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López, M.
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Lorenz, D.
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MacDonald, I.
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Magalhães Fernandes, T.
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Robin, A. C.
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Managau, S.
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Mann, R. G.
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Katz, D.
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Mantelet, G.
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Collins, R. S.
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Marchal, O.
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Marchant, J. M.
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Marschalkó, G.
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Sarro, L. M.
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Marshall, D. J.
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Martín-Fleitas, J. M.
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Martino, M.
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Costigan, G.
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Mary, N.
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Matijevič, G.
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Mazeh, T.
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McMillan, P. J.
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Michalik, D.
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Siopis, C.
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Millar, N. R.
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Miranda, B. M. H.
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Panem, C.
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Molina, D.
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O'Mullane, W.
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Molnár, L.
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Moniez, M.
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Mor, R.
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Smith, M.
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Mora, A.
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Jasniewicz, G.
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Morel, T.
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Morgenthaler, S.
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Morris, D.
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Grebel, E. K.
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Mulone, A. F.
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Narbonne, J.
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Smith, K. W.
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Crifo, F.
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Nelemans, G.
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Noval, L.
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Ordénovic, C.
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Ordieres-Meré, J.
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Osborne, P.
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Holland, A. D.
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Pagani, C.
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Pailler, F.
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Cross, N. J. G.
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Palacin, H.
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Palaversa, L.
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Parsons, P.
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Pecoraro, M.
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Pedrosa, R.
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Pentikäinen, H.
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Pichon, B.
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Huc, C.
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Pineau, F. -X.
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Thuillot, W.
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Plachy, E.
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Plum, G.
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Poujoulet, E.
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Prša, A.
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Ragaini, S.
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Rago, S.
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Rambaux, N.
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Crowley, C.
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Passot, X.
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Ramos-Lerate, M.
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Evans, D. W.
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Ranalli, P.
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Rauw, G.
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Read, A.
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Regibo, S.
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Reylé, C.
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Ribeiro, R. A.
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Rimoldini, L.
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Dafonte, C.
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Perryman, M.
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van Reeven, W.
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Rixon, G.
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Roelens, M.
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Romero-Gómez, M.
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Rowell, N.
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Royer, F.
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Ruiz-Dern, L.
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Damerdji, Y.
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Sadowski, G.
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Sagristà Sellés, T.
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Sahlmann, J.
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Salgado, J.
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Viala, Y.
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Bramante, L.
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Salguero, E.
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Savietto, H.
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Schultheis, M.
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Dapergolas, A.
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Segol, M.
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Segovia, J. C.
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Segransan, D.
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Shih, I. -C.
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Cacciari, C.
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Solano, E.
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David, P.
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Solitro, F.
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Soria Nieto, S.
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Souchay, J.
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Spoto, F.
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Abreu Aramburu, A.
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Stampa, U.
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Steele, I. A.
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Castañeda, J.
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David, M.
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Steidelmüller, H.
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Stephenson, C. A.
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Stoev, H.
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Suess, F. F.
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Süveges, M.
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Surdej, J.
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Szabados, L.
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Accart, S.
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Szegedi-Elek, E.
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Tapiador, D.
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De Cat, P.
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Taris, F.
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Chaoul, L.
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Tauran, G.
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Taylor, M. B.
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Teixeira, R.
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Terrett, D.
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Tingley, B.
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Trager, S. C.
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Aguado, J. J.
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Turon, C.
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Jordan, S.
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Ulla, A.
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Utrilla, E.
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Cheek, N.
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van Elteren, A.
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Van Hemelryck, E.
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vanLeeuwen, M.
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Varadi, M.
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Allan, P. M.
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Pourbaix, D.
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Veljanoski, J.
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Via, T.
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Vicente, D.
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Vogt, S.
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Voss, H.
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De Angeli, F.
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Votruba, V.
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Voutsinas, S.
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Walmsley, G.
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Weiler, M.
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de Felice, F.
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Allasia, W.
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Weingrill, K.
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Wevers, T.
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Wyrzykowski, Ł.
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Yoldas, A.
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Žerjal, M.
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Zucker, S.
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Fabricius, C.
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Zurbach, C.
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Zwitter, T.
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de Laverny, P.
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Alecu, A.
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Allen, M.
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Allende Prieto, C.
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Amorim, A.
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Anglada-Escudé, G.
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Arsenijevic, V.
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Azaz, S.
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Balm, P.
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Guerra, R.
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Beck, M.
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Bernstein, H. -H.
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Álvarez, M. A.
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Bigot, L.
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Bijaoui, A.
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Blasco, C.
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Bonfigli, M.
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Bono, G.
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Boudreault, S.
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Bressan, A.
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De March, R.
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Brown, S.
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Hernández, J.
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Brunet, P. -M.
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Eyer, L.
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Bunclark, P.
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Buonanno, R.
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Butkevich, A. G.
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Carret, C.
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Carrion, C.
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Chemin, L.
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Chéreau, F.
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Darmigny, E.
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Jean-Antoine-Piccolo, A.
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Alves, J.
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de Boer, K. S.
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de Teodoro, P.
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de Zeeuw, P. T.
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Delle Luche, C.
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Domingues, C. D.
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de Souza, R.
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Dubath, P.
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Fodor, F.
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Frézouls, B.
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Fries, A.
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Fustes, D.
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Anderson, R. I.
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Masana, E.
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Fyfe, D.
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Gallardo, E.
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Gallegos, J.
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Debosscher, J.
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Gebran, M.
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Gomboc, A.
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Gómez, A.
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Grux, E.
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Gueguen, A.
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Andrei, A. H.
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Heyrovsky, A.
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Messineo, R.
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Hoar, J.
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del Pozo, E.
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Iannicola, G.
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Isasi Parache, Y.
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Janotto, A. -M.
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Joliet, E.
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Jonckheere, A.
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Keil, R.
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Kim, D. -W.
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Anglada Varela, E.
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Klagyivik, P.
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Klar, J.
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Delbo, M.
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Mowlavi, N.
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Knude, J.
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Kochukhov, O.
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Kolka, I.
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Kos, J.
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Kutka, A.
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Lainey, V.
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LeBouquin, D.
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Antiche, E.
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Liu, C.
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Kontizas, M.
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Makarov, V. V.
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Nienartowicz, K.
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Marseille, M. G.
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Martayan, C.
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Martinez-Rubi, O.
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Massart, B.
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Meynadier, F.
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Mignot, S.
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Antoja, T.
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Delgado, A.
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Nguyen, A. -T.
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Nordlander, T.
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O'Flaherty, K. S.
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Ordóñez-Blanco, D.
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Ocvirk, P.
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Olias Sanz, A.
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Ortiz, P.
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Osorio, J.
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Oszkiewicz, D.
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Antón, S.
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Ouzounis, A.
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Palmer, M.
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Park, P.
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Pasquato, E.
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Peltzer, C.
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Panuzzo, P.
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Peralta, J.
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Péturaud, F.
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Pieniluoma, T.
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Delgado, H. E.
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Pigozzi, E.
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Arcay, B.
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Poels, J.
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Prat, G.
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Prod'homme, T.
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Raison, F.
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Rebordao, J. M.
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Risquez, D.
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Portell, J.
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Rocca-Volmerange, B.
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Di Matteo, P.
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Rosen, S.
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Ruiz-Fuertes, M. I.
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Bach, N.
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Sembay, S.
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Serraller Vizcaino, I.
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Short, A.
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Siebert, A.
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Silva, H.
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Sinachopoulos, D.
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Diakite, S.
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Richards, P. J.
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Slezak, E.
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Soffel, M.
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Baker, S. G.
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Sosnowska, D.
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Straižys, V.
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ter Linden, M.
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Terrell, D.
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Theil, S.
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Tiede, C.
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Troisi, L.
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Tsalmantza, P.
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Riello, M.
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Tur, D.
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Jansen, F.
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Vaccari, M.
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Vachier, F.
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Valles, P.
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Van Hamme, W.
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Veltz, L.
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Dolding, C.
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Virtanen, J.
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Wallut, J. -M.
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Wichmann, R.
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Wilkinson, M. I.
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Seabroke, G. M.
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Balaguer-Núñez, L.
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Ziaeepour, H.
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Zschocke, S.
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Tanga, P.
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Thévenin, F.
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Dos Anjos, S.
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Torra, J.
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Els, S. G.
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Gracia-Abril, G.
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Garcia-Reinaldos, M.
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Lock, T.
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Barache, C.
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Mercier, E.
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Altmann, M.
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Andrae, R.
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Drazinos, P.
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Astraatmadja, T. L.
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Bellas-Velidis, I.
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Benson, K.
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Berthier, J.
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Blomme, R.
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Busso, G.
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Carry, B.
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Barata, C.
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Durán, J.
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Cowell, S.
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Creevey, O.
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Cuypers, J.
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Davidson, M.
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De Ridder, J.
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de Torres, A.
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Delchambre, L.
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Barbier, A.
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Ducourant, C.
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Korn, A. J.
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Frémat, Y.
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García-Torres, M.
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Gosset, E.
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Halbwachs, J. -L.
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Hambly, N. C.
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Harrison, D. L.
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Hauser, M.
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Hestroffer, D.
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Hodgkin, S. T.
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Barblan, F.
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Dzigan, Y.
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Huckle, H. E.
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Hutton, A.
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Barrado y Navascués, D.
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Barros, M.
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Barstow, M. A.
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Klioner, S. A.
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Bello García, A.
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Belokurov, V.
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Edvardsson, B.
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Bendjoya, P.
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Berihuete, A.
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Bianchi, L.
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Bienaymé, O.
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Billebaud, F.
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Blagorodnova, N.
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Blanco-Cuaresma, S.
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Boch, T.
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Lammers, U.
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Bombrun, A.
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Sartoretti, P.
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Borrachero, R.
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Bouquillon, S.
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Bourda, G.
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Bouy, H.
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Breddels, M. A.
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Brouillet, N.
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Brüsemeister, T.
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Luri, X.
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Enke, H.
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Burgess, P.
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Burgon, R.
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Burlacu, A.
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Caffau, E.
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Cambras, J.
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Campbell, H.
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Cancelliere, R.
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Cantat-Gaudin, T.
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Evans, N. W.
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Mignard, F.
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Carlucci, T.
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Eynard Bontemps, G.
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Fabre, C.
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Faigler, S.
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Falcão, A. J.
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Farràs Casas, M.
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Federici, L.
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Fedorets, G.
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Siddiqui, H. I.
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Fernández-Hernández, J.
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Fernique, P.
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Fienga, A.
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Figueras, F.
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Filippi, F.
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Findeisen, K.
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Manteiga, M.
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Fonti, A.
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Fouesneau, M.
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Fraile, E.
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Fraser, M.
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Soubiran, C.
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Fuchs, J.
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Galluccio, L.
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Garabato, D.
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Moitinho, A.
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García-Sedano, F.
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Garralda, N.
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Gavras, P.
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Gerssen, J.
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Valette, V.
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Geyer, R.
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Gilmore, G.
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Girona, S.
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Giuffrida, G.
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Muinonen, K.
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Gomes, M.
Abstract
Context. The first Gaia Data Release contains the Tycho-Gaia Astrometric Solution (TGAS). This is a subset of about 2 million stars for which, besides the position and photometry, the proper motion and parallax are calculated using Hipparcos and Tycho-2 positions in 1991.25 as prior information.
Aims: We investigate the scientific potential and limitations of the TGAS component by means of the astrometric data for open clusters.
Methods: Mean cluster parallax and proper motion values are derived taking into account the error correlations within the astrometric solutions for individual stars, an estimate of the internal velocity dispersion in the cluster, and, where relevant, the effects of the depth of the cluster along the line of sight. Internal consistency of the TGAS data is assessed.
Results: Values given for standard uncertainties are still inaccurate and may lead to unrealistic unit-weight standard deviations of least squares solutions for cluster parameters. Reconstructed mean cluster parallax and proper motion values are generally in very good agreement with earlier Hipparcos-based determination, although the Gaia mean parallax for the Pleiades is a significant exception. We have no current explanation for that discrepancy. Most clusters are observed to extend to nearly 15 pc from the cluster centre, and it will be up to future Gaia releases to establish whether those potential cluster-member stars are still dynamically bound to the clusters.
Conclusions: The Gaia DR1 provides the means to examine open clusters far beyond their more easily visible cores, and can provide membership assessments based on proper motions and parallaxes. A combined HR diagram shows the same features as observed before using the Hipparcos data, with clearly increased luminosities for older A and F dwarfs.
Aims: We investigate the scientific potential and limitations of the TGAS component by means of the astrometric data for open clusters.
Methods: Mean cluster parallax and proper motion values are derived taking into account the error correlations within the astrometric solutions for individual stars, an estimate of the internal velocity dispersion in the cluster, and, where relevant, the effects of the depth of the cluster along the line of sight. Internal consistency of the TGAS data is assessed.
Results: Values given for standard uncertainties are still inaccurate and may lead to unrealistic unit-weight standard deviations of least squares solutions for cluster parameters. Reconstructed mean cluster parallax and proper motion values are generally in very good agreement with earlier Hipparcos-based determination, although the Gaia mean parallax for the Pleiades is a significant exception. We have no current explanation for that discrepancy. Most clusters are observed to extend to nearly 15 pc from the cluster centre, and it will be up to future Gaia releases to establish whether those potential cluster-member stars are still dynamically bound to the clusters.
Conclusions: The Gaia DR1 provides the means to examine open clusters far beyond their more easily visible cores, and can provide membership assessments based on proper motions and parallaxes. A combined HR diagram shows the same features as observed before using the Hipparcos data, with clearly increased luminosities for older A and F dwarfs.
Tables D.1 to D.19 are also available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/601/A19
Volume
601
Start page
A19
Issn Identifier
0004-6361
Ads BibCode
2017A&A...601A..19G
Rights
open.access
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