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. doi:10.3847/1538-3881/aaa3f2. 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:

URL	URL Type	Description
https://doi.org/10.3847/1538-3881/aaa3f2	DOI	Article
http://iopscience.iop.org/article/10.3847/1538-3881/aaa3f2/meta	Publisher	Article
https://arxiv.org/abs/1712.08658	arXiv	Discussion Paper

ORCID:

Author	ORCID
Kellogg, Kendra	0000-0002-1819-3387
Kirkpatrick, J. Davy	0000-0003-4269-260X
Metchev, Stanimir	0000-0003-3050-8203
Gagné, Jonathan	0000-0002-2592-9612
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 Agency	Grant Number
Infrared Processing and Analysis Center (IPAC)	UNSPECIFIED
NASA/JPL/Caltech	UNSPECIFIED

Subject Keywords:

brown dwarfs – infrared: stars – stars: individual (WISE J071121.36-573634.2) – stars: late-type – stars: peculiar

Issue or Number:

DOI:

10.3847/1538-3881/aaa3f2

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:

15 Nov 2021 20:21

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