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dc.contributor.authorSchmidt, Sarah J.
dc.contributor.authorHawley, Suzanne L.
dc.contributor.authorPineda, J. Sebastian
dc.contributor.authorWest, A. A.
dc.date.accessioned2015-01-22T18:50:24Z
dc.date.available2015-01-22T18:50:24Z
dc.date.issued2010-03
dc.date.submitted2009-11
dc.identifier.issn0004-6256
dc.identifier.issn1538-3881
dc.identifier.urihttp://hdl.handle.net/1721.1/93145
dc.description.abstractWe present a sample of 484 L dwarfs, 210 of which are newly discovered from the Sloan Digital Sky Survey (SDSS) Data Release 7 spectroscopic database. We combine this sample with known L dwarfs to investigate their izJHK[subscript S] colors. Our spectroscopically selected sample has ~0.1 mag bluer median J – K[subscript S] color at a given spectral type (for L0-L4) than previously known L dwarfs, which reflects a bias toward redder L dwarfs in past selection criteria. We present photometric distance relations based on i – z and i – J colors and derive distances to our L dwarf sample. We combine the distances with SDSS/2MASS proper motions in order to examine the tangential velocities. For the majority of our spectroscopic sample, we measured radial velocities and present three-dimensional kinematics. We also provide Hα detections for the fraction of our sample with sufficient quality spectra. Comparison of the velocities of our L dwarf sample to a kinematic model shows evidence for both cold and hot dynamical populations, consistent with young and old disk components. The dispersions of these components are similar to those found for M dwarfs. We also show that J – K[subscript S] color is correlated with velocity dispersion, confirming a relationship between J – K[subscript S] color and age.en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (Grant AST 06-07644)en_US
dc.language.isoen_US
dc.publisherIOP Publishingen_US
dc.relation.isversionofhttp://dx.doi.org/10.1088/0004-6256/139/5/1808en_US
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_US
dc.sourceAmerican Astronomical Societyen_US
dc.titleCOLORS AND KINEMATICS OF L DWARFS FROM THE SLOAN DIGITAL SKY SURVEYen_US
dc.typeArticleen_US
dc.identifier.citationSchmidt, Sarah J., Andrew A. West, Suzanne L. Hawley, and J. Sebastian Pineda. “COLORS AND KINEMATICS OF L DWARFS FROM THE SLOAN DIGITAL SKY SURVEY.” The Astronomical Journal 139, no. 5 (March 23, 2010): 1808–1821. © 2010 The American Astronomical Societyen_US
dc.contributor.departmentMIT Kavli Institute for Astrophysics and Space Researchen_US
dc.contributor.mitauthorWest, Andrew A.en_US
dc.contributor.mitauthorPineda, J. Sebastianen_US
dc.relation.journalThe Astronomical Journalen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsSchmidt, Sarah J.; West, Andrew A.; Hawley, Suzanne L.; Pineda, J. Sebastianen_US
mit.licensePUBLISHER_POLICYen_US
mit.metadata.statusComplete


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