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http://hdl.handle.net/20.500.12386/36737| Title: | WALLABY - an SKA Pathfinder HI survey | Authors: | Koribalski, Bärbel S. Staveley-Smith, L. Westmeier, T. SERRA, Paolo Spekkens, K. Wong, O.~I. Lee-Waddell, K. Lagos, C.~D.~P. Obreschkow, D. Ryan-Weber, E.~V. Zwaan, M. Kilborn, V. Bekiaris, G. Bekki, K. Bigiel, F. Boselli, A. Bosma, A. Catinella, B. Chauhan, G. Cluver, M.~E. Colless, M. Courtois, H.~M. Crain, R.~A. de Blok, W.~J.~G. Dénes, H. Duffy, A.~R. Elagali, A. Fluke, C.~J. For, B. -Q. Heald, G. Henning, P.~A. Hess, K.~M. Holwerda, B.~W. Howlett, C. Jarrett, T. Jones, D.~H. Jones, M.~G. Józsa, G.~I.~G. Jurek, R. Jütte, E. Kamphuis, P. Karachentsev, I. Kerp, J. KLEINER, DANE Kraan-Korteweg, R.~C. López-Sánchez, Á. R. Madrid, J. Meyer, M. Mould, J. Murugeshan, C. Norris, R.~P. Oh, S. -H. Oosterloo, T.~A. Popping, A. Putman, M. Reynolds, T.~N. Rhee, J. Robotham, A.~S.~G. Ryder, S. Schröder, A.~C. Shao, Li Stevens, A.~R.~H. Taylor, E.~N. van̂A der Hulst, J.~M. Verdes-Montenegro, L. Wakker, B.~P. Wang, J. Whiting, M. Winkel, B. Wolf, C. |
Issue Date: | 2020 | Journal: | ASTROPHYSICS AND SPACE SCIENCE | Number: | 365 | Issue: | 7 | Abstract: | The Widefield ASKAP L-band Legacy All-sky Blind surveY (wallaby) is a next-generation survey of neutral hydrogen (H i) in the Local Universe. It uses the widefield, high-resolution capability of the Australian Square Kilometer Array Pathfinder (ASKAP), a radio interferometer consisting of -m dishes equipped with Phased-Array Feeds (PAFs), located in an extremely radio-quiet zone in Western Australia. wallaby aims to survey three-quarters of the sky () to a redshift of , and generate spectral line image cubes at ∼30 arcsec resolution and ∼1.6 mJy beam−1 per 4 km s−1 channel sensitivity. ASKAP’s instantaneous field of view at 1.4 GHz, delivered by the PAF’s 36 beams, is about 30 sq deg. At an integrated signal-to-noise ratio of five, wallaby is expected to detect around half a million galaxies with a mean redshift of (∼200 Mpc). The scientific goals of wallaby include: (a) a census of gas-rich galaxies in the vicinity of the Local Group; (b) a study of the H i properties of galaxies, groups and clusters, in particular the influence of the environment on galaxy evolution; and (c) the refinement of cosmological parameters using the spatial and redshift distribution of low-bias gas-rich galaxies. For context we provide an overview of recent and planned large-scale H i surveys. Combined with existing and new multi-wavelength sky surveys, wallaby will enable an exciting new generation of panchromatic studies of the Local Universe. — First results from the wallaby pilot survey are revealed, with initial data products publicly available in the CSIRO ASKAP Science Data Archive (CASDA). | URI: | http://hdl.handle.net/20.500.12386/36737 | URL: | https://link.springer.com/article/10.1007/s10509-020-03831-4 | ISSN: | 0004-640X | DOI: | 10.1007/s10509-020-03831-4 | Fulltext: | open |
| Appears in Collections: | 1.01 Articoli in rivista |
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|---|---|---|---|---|
| 2002.07311v2_LR.pdf | Preprint | 3.27 MB | Adobe PDF | View/Open |
| s10509-020-03831-4 compr..pdf | [Administrators only] | 1.89 MB | Adobe PDF |
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