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

Kendra Kellogg; J. Davy Kirkpatrick; Stanimir Metchev; Jonathan Gagne; Jacqueline Faherty

doi:10.3847/1538-3881/aaa3f2

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

Solar and Stellar Astrophysics 2018-02-14 v1

Authors: Kendra Kellogg , J. Davy Kirkpatrick , Stanimir Metchev , Jonathan Gagne , Jacqueline Faherty

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Abstract

We have discovered a potential T0 $\pm$ 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 $\sim$ 170 kms, 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.

Keywords

subdwarf thick disk T dwarf AllWISE2 motion survey kinematics low metallicity

Cite

@article{arxiv.1712.08658,
  title  = {Discovery of a Possible Early-T Thick-Disk Subdwarf from the AllWISE2 Motion Survey},
  author = {Kendra Kellogg and J. Davy Kirkpatrick and Stanimir Metchev and Jonathan Gagne and Jacqueline Faherty},
  journal= {arXiv preprint arXiv:1712.08658},
  year   = {2018}
}

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11 pages, 6 figures, accepted to AJ

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

Abstract

Keywords

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