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dc.contributor.authorCushing, Michael C.
dc.contributor.authorLooper, Dagny L.
dc.contributor.authorBurgasser, Adam J.
dc.contributor.authorKirkpatrick, J. Davy
dc.contributor.authorFaherty, Jacqueline K.
dc.contributor.authorCruz, Kelle L.
dc.contributor.authorSweet, Anne
dc.contributor.authorSanderson, Robyn Ellyn
dc.date.accessioned2010-03-18T13:23:55Z
dc.date.available2010-03-18T13:23:55Z
dc.date.issued2009-04
dc.date.submitted2009-01
dc.identifier.issn0004-637X
dc.identifier.otherarXiv:0902.1059v1
dc.identifier.urihttp://hdl.handle.net/1721.1/52700
dc.description.abstractWe 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.isoen_US
dc.publisherAmerican Astronomical Societyen
dc.relation.isversionofhttp://dx.doi.org/10.1088/0004-637x/696/1/986en
dc.rightsArticle 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.sourceauthor/dept web pageen
dc.title2MASS J06164006-6407194: THE FIRST OUTER HALO L SUBDWARFen
dc.typeArticleen
dc.identifier.citationCushing, Michael C. et al "2MASS J06164006-6407194: THE FIRST OUTER HALO L SUBDWARF." The Astrophysical Journal 696.1 (2009): 986.en
dc.contributor.departmentKavli Institute for Astrophysics and Space Researchen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.approverBurgasser, Adam J.
dc.contributor.mitauthorBurgasser, Adam J.
dc.contributor.mitauthorSanderson, Robyn Ellyn
dc.relation.journalAstrophysical Journalen
dc.eprint.versionOriginal manuscripten
dc.type.urihttp://purl.org/eprint/type/SubmittedJournalArticleen
eprint.statushttp://purl.org/eprint/status/PeerRevieweden
dspace.orderedauthorsCushing, Michael C.; Looper, Dagny; Burgasser, Adam J.; Kirkpatrick, J. Davy; Faherty, Jacqueline; Cruz, Kelle L.; Sweet, Anne; Sanderson, Robyn E.en
dc.identifier.orcidhttps://orcid.org/0000-0003-3939-3297
mit.licensePUBLISHER_POLICYen


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