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Near-infrared spectroscopic characterisation of Gaia ultra-cool dwarf candidates. Spectral types and peculiarities

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dc.contributor.authorRavinet, Thomas
dc.contributor.authorReylé, Céline
dc.contributor.authorLagarde, Nadège
dc.contributor.authorBurgasser, Adam J.
dc.contributor.authorSmart, R. L.
dc.contributor.authorMoya, Wisthon Aby Haro
dc.contributor.authorMarocco, Federico
dc.contributor.authorScholz, Ralf
dc.contributor.authorCooper, W. J.
dc.contributor.authorCruz, Kelle
dc.contributor.authorFernández Trincado, José G.
dc.contributor.authorHomeier, Derek
dc.contributor.authorSarro Baro, Luis Manuel
dc.contributor.orcidhttps://orcid.org/0000-0001-8652-2835
dc.contributor.orcidhttps://orcid.org/0000-0003-2258-2403
dc.contributor.orcidhttps://orcid.org/0000-0003-0108-3859
dc.contributor.orcidhttps://orcid.org/0000-0002-6523-9536
dc.contributor.orcidhttps://orcid.org/0000-0002-4424-4766
dc.contributor.orcidhttps://orcid.org/0000-0003-3642-6903
dc.contributor.orcidhttps://orcid.org/0000-0001-7519-1700
dc.contributor.orcidhttps://orcid.org/0000-0002-0894-9187
dc.contributor.orcidhttps://orcid.org/0000-0003-3501-8967
dc.contributor.orcidhttps://orcid.org/0000-0002-1821-0650
dc.contributor.orcidhttps://orcid.org/0000-0003-3526-5052
dc.contributor.orcidhttps://orcid.org/0000-0002-8546-9128
dc.date.accessioned2024-05-30T17:38:23Z
dc.date.available2024-05-30T17:38:23Z
dc.date.issued2024-04-30
dc.descriptionThe registered version of this article, first published in Astronomy & Astrophysics (A&A), is available online at the publisher's website: EDP Sciences, https://doi.org/10.1051/0004-6361/202347954
dc.descriptionLa versión registrada de este artículo, publicado por primera vez en Astronomy & Astrophysics (A&A), está disponible en línea en el sitio web del editor: EDP Sciences, https://doi.org/10.1051/0004-6361/202347954
dc.description.abstractContext. The local census of very low-mass stars and brown dwarfs is crucial to improving our understanding of the stellar-substellar transition and their formation history. These objects, known as ultra-cool dwarfs (UCDs), are essential targets for searches of potentially habitable planets. However, their detection poses a challenge because of their low luminosity. The Gaia survey has identified numerous new UCD candidates thanks to its large survey and precise astrometry. Aims. We aim to characterise 60 UCD candidates detected by Gaia in the solar neighbourhood with a spectroscopic follow-up to confirm that they are UCDs, as well as to identify peculiarities. Methods. We acquired the near-infrared (NIR) spectra of 60 objects using the SOFI spectrograph between 0.93 and 2.5 µm (R~ 600). We identified their spectral types using a template-matching method. Their binarity is studied using astrometry and spectral features. Results. We confirm that 60 objects in the sample have ultra-cool dwarf spectral types close to those expected from astrometry. Their NIR spectra reveal that seven objects could host an unresolved coolest companion and seven UCDs share the same proper motions as other stars. The characterisation of these UCDs is part of a coordinated effort to improve our understanding of the Solar neighbourhood.en
dc.description.versionversión publicada
dc.identifier.citationNear-infrared spectroscopic characterisation of Gaia ultra-cool dwarf candidates - Spectral types and peculiarities T. Ravinet, C. Reylé, N. Lagarde, A. Burgasser, R. L. Smart, W. H. Moya, F. Marocco, R.-D. Scholz, W. J. Cooper, K. L. Cruz, J. G. Fernández-Trincado, D. Homeier and L. M. Sarro A&A, 685 (2024) A6 DOI: https://doi.org/10.1051/0004-6361/202347954
dc.identifier.doihttps://doi.org/10.1051/0004-6361/202347954
dc.identifier.issn0004-6361 - eISSN 1432-0746
dc.identifier.urihttps://hdl.handle.net/20.500.14468/22237
dc.journal.titleAstronomy & Astrophysics (A&A)
dc.journal.volume685
dc.language.isoen
dc.publisherEDP Sciences
dc.relation.centerE.T.S. de Ingeniería Informática
dc.relation.departmentInteligencia Artificial
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject33 Ciencias Tecnológicas
dc.subject.keywordssurveysen
dc.subject.keywordsbrown dwarfsen
dc.subject.keywordsstars: late-typeen
dc.subject.keywordsstars: low-massen
dc.subject.keywordsinfrared: starsen
dc.titleNear-infrared spectroscopic characterisation of Gaia ultra-cool dwarf candidates. Spectral types and peculiaritiesen
dc.typejournal articleen
dc.typeartículoes
dspace.entity.typePublication
relation.isAuthorOfPublication9f881bbd-b55d-43bd-87b0-41f8f72cff48
relation.isAuthorOfPublication.latestForDiscovery9f881bbd-b55d-43bd-87b0-41f8f72cff48
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