Discovery of the first wide L dwarf + giant binary system and eight other ultracool dwarfs in wide binaries

We identify 806 ultracool dwarfs (of which 34 are newly discovered L dwarfs) from their Sloan Digital Sky Survey (SDSS) riz photometry and obtain proper motions through cross-matching with the United Kingdom Infrared Telescope Infrared Deep Sky Survey (UKIDSS) and Two-Micron All-Sky Survey (2MASS)....

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Autores: Zhang, Z. H., Pinfield, D. J., Day-Jones, A. C., Burningham, B., Jones, H. R. A., Yu, S., Jenkins, J. S., Han, Z., Gálvez-Ortiz, M. C., Gallardo, J., García-Pérez, A. E., Weights, D., Tinney, C. G., Pokorny, R. S.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2010
País:Chile
Idioma:inglés
OAI Identifier:oai:repositorio.anid.cl:10533/245882
Acceso en línea:https://hdl.handle.net/10533/245882
Access Level:acceso abierto
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spelling Pokorny, R. S.Tinney, C. G.Weights, D.García-Pérez, A. E.Gallardo, J.Gálvez-Ortiz, M. C.Han, Z.Jenkins, J. S.Yu, S.Jones, H. R. A.Burningham, B.Day-Jones, A. C.Pinfield, D. J.Zhang, Z. H.2010 10.1111/j.1365-2966.2010.16394.xhttps://hdl.handle.net/10533/245882http://purl.org/coar/access_right/c_abf2Discovery of the first wide L dwarf + giant binary system and eight other ultracool dwarfs in wide binariesZhang, Z. H.Pinfield, D. J.Day-Jones, A. C.Burningham, B.Jones, H. R. A.Yu, S.Jenkins, J. S.Han, Z.Gálvez-Ortiz, M. C.Gallardo, J.García-Pérez, A. E.Weights, D.Tinney, C. G.Pokorny, R. S.2020-08-14T20:42:47Z2022-07-08T20:15:51Z2020-08-14T20:42:47Z2022-07-08T20:15:51Z2010We identify 806 ultracool dwarfs (of which 34 are newly discovered L dwarfs) from their Sloan Digital Sky Survey (SDSS) riz photometry and obtain proper motions through cross-matching with the United Kingdom Infrared Telescope Infrared Deep Sky Survey (UKIDSS) and Two-Micron All-Sky Survey (2MASS). Proper-motion and distance constraints show that nine of our ultracool dwarfs are members of widely separated binary systems: SDSS 0101 (K5V+M9.5V), SDSS 0207 (M1.5V+L3V), SDSS 0832 (K3III+L3.5V), SDSS 0858 (M4V+L0V), SDSS 0953 (M4V+M9.5V), SDSS 0956 (M2V+M9V), SDSS 1304 (M4.5V+L0V), SDSS 1631 (M5.5V+M8V) and SDSS 1638 (M4V+L0V). One of these (SDSS 0832) is shown to be a companion to the bright K3 giant η Cancri. Such primaries can provide age and metallicity constraints for any companion objects, yielding excellent benchmark objects. η Cancri AB is the first wide ultracool dwarf + giant binary system identified. We present new observations and analysis that constrain the metallicity of η Cancri A to be near-solar, and use recent evolutionary models to constrain the age of the giant to be 2.2–6.1 Gyr. If η Cancri B is a single object, we estimate its physical attributes to be mass = 63–82 MJup, Teff= 1800 ± 150 K, log g= 5.3–5.5, [M/H]= 0.0 ± 0.1. Its colours are non-typical when compared with other ultracool dwarfs, and we also assess the possibility that η Cancri B is itself an unresolved binary, showing that the combined light of an L4 + T4 system could provide a reasonable explanation for its colours.CENASTROFONDAPFONDAP1501000315010003virtual::46653-1WOS:000277981400014https://hdl.handle.net/10533/245882enginstname: ANIDreponame: Repositorio Digital RI2.0 10.1111/j.1365-2966.2010.16394.xhttps://academic.oup.com/mnras/article/404/4/1817/1082602info:eu-repo/semantics/openAccessDiscovery of the first wide L dwarf + giant binary system and eight other ultracool dwarfs in wide binariesMonthly Notices of the Royal Astronomical SocietyArticuloinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttps://hdl.handle.net/10533/245882FONDAPhttp://purl.org/coar/resource_type/c_2df8fbb1045fc0e1-ef55-4532-8afe-69fe789d964dvirtual::46653-1045fc0e1-ef55-4532-8afe-69fe789d964dvirtual::46653-110533/245882oai:repositorio.anid.cl:10533/2458822023-07-24 17:58:41.951https://repositorio.anid.clRepositorio ANIDaletelier@anid.cl
dc.title.none.fl_str_mv Discovery of the first wide L dwarf + giant binary system and eight other ultracool dwarfs in wide binaries
dc.title.journal.none.fl_str_mv Monthly Notices of the Royal Astronomical Society
title Discovery of the first wide L dwarf + giant binary system and eight other ultracool dwarfs in wide binaries
spellingShingle Discovery of the first wide L dwarf + giant binary system and eight other ultracool dwarfs in wide binaries
Zhang, Z. H.
title_short Discovery of the first wide L dwarf + giant binary system and eight other ultracool dwarfs in wide binaries
title_full Discovery of the first wide L dwarf + giant binary system and eight other ultracool dwarfs in wide binaries
title_fullStr Discovery of the first wide L dwarf + giant binary system and eight other ultracool dwarfs in wide binaries
title_full_unstemmed Discovery of the first wide L dwarf + giant binary system and eight other ultracool dwarfs in wide binaries
title_sort Discovery of the first wide L dwarf + giant binary system and eight other ultracool dwarfs in wide binaries
dc.creator.none.fl_str_mv Zhang, Z. H.
Pinfield, D. J.
Day-Jones, A. C.
Burningham, B.
Jones, H. R. A.
Yu, S.
Jenkins, J. S.
Han, Z.
Gálvez-Ortiz, M. C.
Gallardo, J.
García-Pérez, A. E.
Weights, D.
Tinney, C. G.
Pokorny, R. S.
author Zhang, Z. H.
author_facet Zhang, Z. H.
Pinfield, D. J.
Day-Jones, A. C.
Burningham, B.
Jones, H. R. A.
Yu, S.
Jenkins, J. S.
Han, Z.
Gálvez-Ortiz, M. C.
Gallardo, J.
García-Pérez, A. E.
Weights, D.
Tinney, C. G.
Pokorny, R. S.
author_role author
author2 Pinfield, D. J.
Day-Jones, A. C.
Burningham, B.
Jones, H. R. A.
Yu, S.
Jenkins, J. S.
Han, Z.
Gálvez-Ortiz, M. C.
Gallardo, J.
García-Pérez, A. E.
Weights, D.
Tinney, C. G.
Pokorny, R. S.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
description We identify 806 ultracool dwarfs (of which 34 are newly discovered L dwarfs) from their Sloan Digital Sky Survey (SDSS) riz photometry and obtain proper motions through cross-matching with the United Kingdom Infrared Telescope Infrared Deep Sky Survey (UKIDSS) and Two-Micron All-Sky Survey (2MASS). Proper-motion and distance constraints show that nine of our ultracool dwarfs are members of widely separated binary systems: SDSS 0101 (K5V+M9.5V), SDSS 0207 (M1.5V+L3V), SDSS 0832 (K3III+L3.5V), SDSS 0858 (M4V+L0V), SDSS 0953 (M4V+M9.5V), SDSS 0956 (M2V+M9V), SDSS 1304 (M4.5V+L0V), SDSS 1631 (M5.5V+M8V) and SDSS 1638 (M4V+L0V). One of these (SDSS 0832) is shown to be a companion to the bright K3 giant η Cancri. Such primaries can provide age and metallicity constraints for any companion objects, yielding excellent benchmark objects. η Cancri AB is the first wide ultracool dwarf + giant binary system identified. We present new observations and analysis that constrain the metallicity of η Cancri A to be near-solar, and use recent evolutionary models to constrain the age of the giant to be 2.2–6.1 Gyr. If η Cancri B is a single object, we estimate its physical attributes to be mass = 63–82 MJup, Teff= 1800 ± 150 K, log g= 5.3–5.5, [M/H]= 0.0 ± 0.1. Its colours are non-typical when compared with other ultracool dwarfs, and we also assess the possibility that η Cancri B is itself an unresolved binary, showing that the combined light of an L4 + T4 system could provide a reasonable explanation for its colours.
publishDate 2010
dc.date.issued.none.fl_str_mv 2010
dc.date.accessioned.none.fl_str_mv 2020-08-14T20:42:47Z
2022-07-08T20:15:51Z
dc.date.available.none.fl_str_mv 2020-08-14T20:42:47Z
2022-07-08T20:15:51Z
dc.type.none.fl_str_mv Articulo
dc.type.driver.none.fl_str_mv info:eu-repo/semantics/article
dc.type.openaire.none.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.folio.none.fl_str_mv 15010003
15010003
dc.identifier.idwos.none.fl_str_mv WOS:000277981400014
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/10533/245882
identifier_str_mv 15010003
WOS:000277981400014
url https://hdl.handle.net/10533/245882
dc.language.iso.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv instname: ANID
reponame: Repositorio Digital RI2.0
dc.relation.doi.none.fl_str_mv  10.1111/j.1365-2966.2010.16394.x
dc.relation.uri.none.fl_str_mv https://academic.oup.com/mnras/article/404/4/1817/1082602
dc.rights.driver.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
repository.name.fl_str_mv Repositorio ANID
repository.mail.fl_str_mv aletelier@anid.cl
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