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  • 标题:Discovery of a Possible Early-T Thick-disk Subdwarf from the AllWISE2 Motion Survey
  • 本地全文:下载
  • 作者:Kendra Kellogg ; J. Davy Kirkpatrick ; Stanimir Metchev
  • 期刊名称:The Astronomical journal
  • 印刷版ISSN:0004-6256
  • 电子版ISSN:1538-3881
  • 出版年度:2018
  • 卷号:155
  • 期号:2
  • 页码:1-10
  • DOI:10.3847/1538-3881/aaa3f2
  • 语种:English
  • 出版社:American Institute of Physics
  • 摘要: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.
  • 关键词:brown dwarfs;infrared: stars;stars: individual (WISE J071121.36-573634.2);stars: late-type;stars: peculiar
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