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2MASS J06164006-6407194: THE FIRST OUTER HALO L SUBDWARF

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dc.contributor.author Cushing, Michael C.
dc.contributor.author Looper, Dagny
dc.contributor.author Burgasser, Adam J.
dc.contributor.author Kirkpatrick, J. Davy
dc.contributor.author Faherty, Jacqueline
dc.contributor.author Cruz, Kelle L.
dc.contributor.author Sweet, Anne
dc.contributor.author Sanderson, Robyn Ellyn
dc.date.accessioned 2010-03-18T13:23:55Z
dc.date.available 2010-03-18T13:23:55Z
dc.date.issued 2009-04
dc.date.submitted 2009-01
dc.identifier.issn 0004-637X
dc.identifier.other arXiv:0902.1059v1
dc.identifier.uri http://hdl.handle.net/1721.1/52700
dc.description.abstract We present the serendipitous discovery of an L subdwarf in the Two Micron All Sky Survey (2MASS) J06164006–6407194, in a search of the 2MASS for T dwarfs. Its spectrum exhibits features indicative of both a cool and metal poor atmosphere including a heavily pressure-broadened K I resonant doublet, Cs I and Rb I lines, molecular bands of CaH, TiO, CrH, FeH, and H[subscript 2]O, and enhanced collision induced absorption of H[subscript 2]. We assign 2MASS J0616–6407 a spectral type of sdL5 based on a comparison of its red optical spectrum to that of near solar-metallicity L dwarfs. Its high proper motion (μ = 1farcs405 ± 0.008 yr[superscript –1]), large radial velocity (V rad = 454 ± 15 km s[superscript –1]), estimated u, v, w velocities (94, –573, 125) km s[superscript –1] and Galactic orbit with an apogalacticon at ~29 kpc are indicative of membership in the outer halo making 2MASS J0616–6407 the first ultracool member of this population. en
dc.language.iso en_US
dc.publisher American Astronomical Society en
dc.relation.isversionof http://dx.doi.org/10.1088/0004-637x/696/1/986 en
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. en
dc.source author/dept web page en
dc.title 2MASS J06164006-6407194: THE FIRST OUTER HALO L SUBDWARF en
dc.type Article en
dc.identifier.citation Cushing, Michael C. et al "2MASS J06164006-6407194: THE FIRST OUTER HALO L SUBDWARF." The Astrophysical Journal 696.1 (2009): 986. en
dc.contributor.department Kavli Institute for Astrophysics and Space Research en_US
dc.contributor.department Massachusetts Institute of Technology. Department of Physics en_US
dc.contributor.approver Burgasser, Adam J.
dc.contributor.mitauthor Burgasser, Adam J.
dc.contributor.mitauthor Sanderson, Robyn Ellyn
dc.relation.journal Astrophysical Journal en
dc.identifier.mitlicense PUBLISHER_POLICY en
dc.eprint.version Original manuscript en
dc.type.uri http://purl.org/eprint/type/SubmittedJournalArticle en
eprint.status http://purl.org/eprint/status/PeerReviewed en
dspace.orderedauthors Cushing, Michael C.; Looper, Dagny; Burgasser, Adam J.; Kirkpatrick, J. Davy; Faherty, Jacqueline; Cruz, Kelle L.; Sweet, Anne; Sanderson, Robyn E. en


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