Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/31273
Campo DC | Valore | Lingua |
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dc.contributor.author | Tremblay, P. -E. | en_US |
dc.contributor.author | Hollands, M. A. | en_US |
dc.contributor.author | Gentile Fusillo, N. P. | en_US |
dc.contributor.author | McCleery, J. | en_US |
dc.contributor.author | Izquierdo, P. | en_US |
dc.contributor.author | Gänsicke, B. T. | en_US |
dc.contributor.author | Cukanovaite, E. | en_US |
dc.contributor.author | Koester, D. | en_US |
dc.contributor.author | Brown, W. R. | en_US |
dc.contributor.author | Charpinet, S. | en_US |
dc.contributor.author | Cunningham, T. | en_US |
dc.contributor.author | Farihi, J. | en_US |
dc.contributor.author | Giammichele, N. | en_US |
dc.contributor.author | van Grootel, V. | en_US |
dc.contributor.author | Hermes, J. J. | en_US |
dc.contributor.author | Hoskin, M. J. | en_US |
dc.contributor.author | Jordan, S. | en_US |
dc.contributor.author | Kepler, S. O. | en_US |
dc.contributor.author | Kleinman, S. J. | en_US |
dc.contributor.author | Manser, C. J. | en_US |
dc.contributor.author | Marsh, T. R. | en_US |
dc.contributor.author | DE MARTINO, Domitilla | en_US |
dc.contributor.author | Nitta, A. | en_US |
dc.contributor.author | Parsons, S. G. | en_US |
dc.contributor.author | Pelisoli, I. | en_US |
dc.contributor.author | Raddi, R. | en_US |
dc.contributor.author | Rebassa-Mansergas, A. | en_US |
dc.contributor.author | Ren, J. -J. | en_US |
dc.contributor.author | Schreiber, M. R. | en_US |
dc.contributor.author | SILVOTTI, Roberto | en_US |
dc.contributor.author | Toloza, O. | en_US |
dc.contributor.author | Toonen, S. | en_US |
dc.contributor.author | Torres, S. | en_US |
dc.date.accessioned | 2021-12-28T12:22:10Z | - |
dc.date.available | 2021-12-28T12:22:10Z | - |
dc.date.issued | 2020 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/31273 | - |
dc.description.abstract | We present a spectroscopic survey of 230 white dwarf candidates within 40 pc of the Sun from the William Herschel Telescope and Gran Telescopio Canarias. All candidates were selected from Gaia Data Release 2 (DR2) and in almost all cases, had no prior spectroscopic classifications. We find a total of 191 confirmed white dwarfs and 39 main-sequence star contaminants. The majority of stellar remnants in the sample are relatively cool (<T<SUB>eff</SUB>> = 6200 K), showing either hydrogen Balmer lines or a featureless spectrum, corresponding to 89 DA and 76 DC white dwarfs, respectively. We also recover two DBA white dwarfs and 9-10 magnetic remnants. We find two carbon-bearing DQ stars and 14 new metal-rich white dwarfs. This includes the possible detection of the first ultra-cool white dwarf with metal lines. We describe three DZ stars for which we find at least four different metal species, including one that is strongly Fe- and Ni-rich, indicative of the accretion of a planetesimal with core-Earth composition. We find one extremely massive (1.31 ± 0.01 M<SUB>⊙</SUB>) DA white dwarf showing weak Balmer lines, possibly indicating stellar magnetism. Another white dwarf shows strong Balmer line emission but no infrared excess, suggesting a low-mass sub-stellar companion. A high spectroscopic completeness (>99 per cent) has now been reached for Gaia DR2 sources within 40-pc sample, in the Northern hemisphere (δ > 0°) and located on the white dwarf cooling track in the Hertzsprung-Russell diagram. A statistical study of the full northern sample is presented in a companion paper. | en_US |
dc.language.iso | eng | en_US |
dc.title | Gaia white dwarfs within 40 pc - I. Spectroscopic observations of new candidates | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/staa1892 | en_US |
dc.identifier.scopus | 2-s2.0-85091631576 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/497/1/130/5866510 | en_US |
dc.identifier.url | https://arxiv.org/pdf/2006.00965.pdf | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 497 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 130 | en_US |
dc.relation.lastpage | 145 | en_US |
dc.relation.numberofpages | 16 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | GBR | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2020MNRAS.497..130T | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.fulltext | With Fulltext | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.dept | O.A. Torino | - |
crisitem.author.orcid | 0000-0002-5069-4202 | - |
crisitem.author.orcid | 0000-0002-1295-8174 | - |
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