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Discovery of a Possible Early-T Thick-disk Subdwarf from the AllWISE2 Motion Survey

Kellogg, Kendra and Kirkpatrick, J. Davy and Metchev, Stanimir and Gagné, Jonathan and Faherty, Jacqueline K. (2018) Discovery of a Possible Early-T Thick-disk Subdwarf from the AllWISE2 Motion Survey. Astronomical Journal, 155 (2). Art. No. 87. ISSN 1538-3881. https://resolver.caltech.edu/CaltechAUTHORS:20180131-152815121

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Abstract

We have discovered a potential T0 ± 1 subdwarf from a search for sources in the AllWISE2 Motion Survey that do not have counterparts in surveys at shorter wavelengths. With a tangential velocity of ~170 km s^(-1), this object—WISE J071121.36–573634.2—has kinematics that are consistent with the thick-disk population of the Milky Way. Spectral fits suggest a low-metallicity for this object but also allow for the possibility of unresolved multiplicity. If WISE J0711–5736 is indeed an sdT0 dwarf, it would be only the second early-T subdwarf discovered to date.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.3847/1538-3881/aaa3f2DOIArticle
http://iopscience.iop.org/article/10.3847/1538-3881/aaa3f2/metaPublisherArticle
https://arxiv.org/abs/1712.08658arXivDiscussion Paper
ORCID:
AuthorORCID
Kellogg, Kendra0000-0002-1819-3387
Kirkpatrick, J. Davy0000-0003-4269-260X
Metchev, Stanimir0000-0003-3050-8203
Gagné, Jonathan0000-0002-2592-9612
Faherty, Jacqueline K.0000-0001-6251-0573
Additional Information:© 2018 The American Astronomical Society. Received 2017 July 6; revised 2017 December 20; accepted 2017 December 21; published 2018 January 25. This paper includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile. We thank the anonymous referees for their very constructive comments that helped improve this paper. K.K. acknowledges support via the IPAC Visiting Graduate Student Program. This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. Facility: Magellan: Baade (FIRE).
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
Infrared Processing and Analysis Center (IPAC)UNSPECIFIED
NASA/JPL/CaltechUNSPECIFIED
Subject Keywords:brown dwarfs – infrared: stars – stars: individual (WISE J071121.36-573634.2) – stars: late-type – stars: peculiar
Issue or Number:2
Record Number:CaltechAUTHORS:20180131-152815121
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180131-152815121
Official Citation:Kendra Kellogg et al 2018 AJ 155 87
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84612
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:01 Feb 2018 00:29
Last Modified:03 Mar 2020 13:01

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