The Gaia Ultra-Cool Dwarf Sample – III: seven new multiple systems containing at least one Gaia DR2 ultracool dwarf
We present 10 new ultracool dwarfs in seven wide binary systems discovered using Gaia second data release data, identified as part of our Gaia Ultra-Cool Dwarf Sample project. The seven systems presented here include an L1 companion to the G5 IV star HD 164507, an L1: companion to the V478 Lyr AB sy...
| Autores: | , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Instituto Nacional de Técnica Aeroespacial (INTA) |
| Repositorio: | DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial |
| OAI Identifier: | oai:digital.inta.es:20.500.12666/300 |
| Acceso en línea: | https://academic.oup.com/mnras/article/494/4/4891/5820239 http://hdl.handle.net/20.500.12666/300 |
| Access Level: | acceso abierto |
| Palabra clave: | Binaries: visual Brown dwarfs Stars: individual: HD 164507 V478 Lyr CD-28 8692 LT UMa Stars: low-mass |
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The Gaia Ultra-Cool Dwarf Sample – III: seven new multiple systems containing at least one Gaia DR2 ultracool dwarfMarocco, F.Smart, R. L.Mamajek, E. E.Sarro, L. M.Burgasser, A. J.Caballero, J. A.Rees, J. M.Caselden, D.Cruz, K. L.Van Linge, R.Pinfield, David J.Binaries: visualBrown dwarfsStars: individual: HD 164507V478 LyrCD-28 8692LT UMaStars: low-massWe present 10 new ultracool dwarfs in seven wide binary systems discovered using Gaia second data release data, identified as part of our Gaia Ultra-Cool Dwarf Sample project. The seven systems presented here include an L1 companion to the G5 IV star HD 164507, an L1: companion to the V478 Lyr AB system, an L2 companion to the metal-poor K5 V star CD-28 8692, an M9 V companion to the young variable K0 V star LT UMa, and three low-mass binaries consisting of late Ms and early Ls. The HD 164507, CD-28 8692, V478 Lyr, and LT UMa systems are particularly important benchmarks, because the primaries are well characterized and offer excellent constraints on the atmospheric parameters and ages of the companions. We find that the M8 V star 2MASS J23253550+4608163 is ∼2.5 mag overluminous compared to M dwarfs of similar spectral type, but at the same time it does not exhibit obvious peculiarities in its near-infrared spectrum. Its overluminosity cannot be explained by unresolved binarity alone. Finally, we present an L1+L2 system with a projected physical separation of 959 au, making this the widest L + L binary currently known.FM acknowledges support by the NASA Postdoctoral Program at the Jet Propulsion Laboratory, administered by Universities Space Research Association under a contract with NASA. SPLAT is a collaborative project of research students in UCSD Cool Star Lab. Contributors to SPLAT have included Christian Aganze, Jessica Birky, Daniella Bardalez Gagliuffi, Adam Burgasser (PI), Caleb Choban, Andrew Davis, Ivanna Escala, Aishwarya Iyer, Yuhui Jin, Mike Lopez, Alex Mendez, Gretel Mercado, Elizabeth Moreno Hilario, Johnny Parra, Maitrayee Sahi, Adrian Suarez, Melisa Tallis, Tomoki Tamiya, Chris Theissen and Russell van Linge. This project is supported by the National Aeronautics and Space Administration under grant no. NNX15AI75G. This publication makes use of VOSA, developed under the Spanish Virtual Observatory project supported by the Spanish MINECO through grant AyA2017-84089; With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737).Peer reviewOxford Academics: Oxford University PressUnidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-07370000-0002-5622-51910000-0002-4424-47660000-0002-6523-9536National Aeronautics and Space Administration (NASA)Agencia Estatal de Investigación (AEI)202120212020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501application/pdfhttps://academic.oup.com/mnras/article/494/4/4891/5820239http://hdl.handle.net/20.500.12666/300reponame:DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacialinstname:Instituto Nacional de Técnica Aeroespacial (INTA)InglésEL OBSERVATORIO VIRTUAL ESPAÑOL. EXPLOTACION CIENTIFICO-TECNICA DE ARCHIVOS ASTRONOMICOSinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2017-84089-PAttribution-NonCommercial-NoDerivatives 4.0 InternationalCopyright © 2020, Oxford University Presshttps://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:digital.inta.es:20.500.12666/3002026-06-23T12:46:37Z |
| dc.title.none.fl_str_mv |
The Gaia Ultra-Cool Dwarf Sample – III: seven new multiple systems containing at least one Gaia DR2 ultracool dwarf |
| title |
The Gaia Ultra-Cool Dwarf Sample – III: seven new multiple systems containing at least one Gaia DR2 ultracool dwarf |
| spellingShingle |
The Gaia Ultra-Cool Dwarf Sample – III: seven new multiple systems containing at least one Gaia DR2 ultracool dwarf Marocco, F. Binaries: visual Brown dwarfs Stars: individual: HD 164507 V478 Lyr CD-28 8692 LT UMa Stars: low-mass |
| title_short |
The Gaia Ultra-Cool Dwarf Sample – III: seven new multiple systems containing at least one Gaia DR2 ultracool dwarf |
| title_full |
The Gaia Ultra-Cool Dwarf Sample – III: seven new multiple systems containing at least one Gaia DR2 ultracool dwarf |
| title_fullStr |
The Gaia Ultra-Cool Dwarf Sample – III: seven new multiple systems containing at least one Gaia DR2 ultracool dwarf |
| title_full_unstemmed |
The Gaia Ultra-Cool Dwarf Sample – III: seven new multiple systems containing at least one Gaia DR2 ultracool dwarf |
| title_sort |
The Gaia Ultra-Cool Dwarf Sample – III: seven new multiple systems containing at least one Gaia DR2 ultracool dwarf |
| dc.creator.none.fl_str_mv |
Marocco, F. Smart, R. L. Mamajek, E. E. Sarro, L. M. Burgasser, A. J. Caballero, J. A. Rees, J. M. Caselden, D. Cruz, K. L. Van Linge, R. Pinfield, David J. |
| author |
Marocco, F. |
| author_facet |
Marocco, F. Smart, R. L. Mamajek, E. E. Sarro, L. M. Burgasser, A. J. Caballero, J. A. Rees, J. M. Caselden, D. Cruz, K. L. Van Linge, R. Pinfield, David J. |
| author_role |
author |
| author2 |
Smart, R. L. Mamajek, E. E. Sarro, L. M. Burgasser, A. J. Caballero, J. A. Rees, J. M. Caselden, D. Cruz, K. L. Van Linge, R. Pinfield, David J. |
| author2_role |
author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737 0000-0002-5622-5191 0000-0002-4424-4766 0000-0002-6523-9536 National Aeronautics and Space Administration (NASA) Agencia Estatal de Investigación (AEI) |
| dc.subject.none.fl_str_mv |
Binaries: visual Brown dwarfs Stars: individual: HD 164507 V478 Lyr CD-28 8692 LT UMa Stars: low-mass |
| topic |
Binaries: visual Brown dwarfs Stars: individual: HD 164507 V478 Lyr CD-28 8692 LT UMa Stars: low-mass |
| description |
We present 10 new ultracool dwarfs in seven wide binary systems discovered using Gaia second data release data, identified as part of our Gaia Ultra-Cool Dwarf Sample project. The seven systems presented here include an L1 companion to the G5 IV star HD 164507, an L1: companion to the V478 Lyr AB system, an L2 companion to the metal-poor K5 V star CD-28 8692, an M9 V companion to the young variable K0 V star LT UMa, and three low-mass binaries consisting of late Ms and early Ls. The HD 164507, CD-28 8692, V478 Lyr, and LT UMa systems are particularly important benchmarks, because the primaries are well characterized and offer excellent constraints on the atmospheric parameters and ages of the companions. We find that the M8 V star 2MASS J23253550+4608163 is ∼2.5 mag overluminous compared to M dwarfs of similar spectral type, but at the same time it does not exhibit obvious peculiarities in its near-infrared spectrum. Its overluminosity cannot be explained by unresolved binarity alone. Finally, we present an L1+L2 system with a projected physical separation of 959 au, making this the widest L + L binary currently known. |
| publishDate |
2020 |
| dc.date.none.fl_str_mv |
2020 2021 2021 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 |
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article |
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publishedVersion |
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https://academic.oup.com/mnras/article/494/4/4891/5820239 http://hdl.handle.net/20.500.12666/300 |
| url |
https://academic.oup.com/mnras/article/494/4/4891/5820239 http://hdl.handle.net/20.500.12666/300 |
| dc.language.none.fl_str_mv |
Inglés |
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Inglés |
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EL OBSERVATORIO VIRTUAL ESPAÑOL. EXPLOTACION CIENTIFICO-TECNICA DE ARCHIVOS ASTRONOMICOS info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2017-84089-P |
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Attribution-NonCommercial-NoDerivatives 4.0 International Copyright © 2020, Oxford University Press https://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
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Attribution-NonCommercial-NoDerivatives 4.0 International Copyright © 2020, Oxford University Press https://creativecommons.org/licenses/by-nc-nd/4.0/ |
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openAccess |
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application/pdf |
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Oxford Academics: Oxford University Press |
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Oxford Academics: Oxford University Press |
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