The Onset of Methane in L Dwarfs

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 01 Oct 2000Embargo end date: 01 Jan 2000Publisher:American Astronomical SocietyJournal:The Astrophysical Journal, volume 541, pages L75-L78 (issn: 0004-637X,

Copyright policy )Funded by:NSF | Innovations in Giant Plan...

Authors: Noll, Keith S.; Geballe, T. R.; Leggett, S. K.; Marley, Mark S.;

doi: 10.1086/312906 , 10.48550/arxiv.astro-ph/0007449

arXiv: astro-ph/0007449

The Onset of Methane in L Dwarfs

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Abstract

We have detected weak absorption features produced by the strong nu(3) methane band at 3.3 microns in two L dwarfs, 2MASSW J1507476-162738 and 2MASSI J0825196+211552, classified by Kirkpatrick et al. (2000) as spectral types L5 and L7.5 respectively. These absorptions occur in objects warmer than any in which methane previously has been detected, and mark the first appearance of methane in the ultracool star-to-brown dwarf spectral sequence.

12 pages, 2 figures; accepted by ApJ Letters

Related Organizations

New Mexico State University Alamogordo
United States
Space Telescope Science Institute
United States
New Mexico State University
United States
International Gemini Observatory

Keywords

Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics

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