POSTER PAPER 2.07

Near Infrared Photometry of L and T Dwarfs
Denise C. Stephens, Mark S. Marley, Keith S. Noll

Institute: New Mexico State University
Institute: Space Sciences Division/NASA Ames Research Center
Institute: Space Telescope Science Institute
Contact Email: densteph@nmsu.edu

Abstract: To better understand and model the atmospheres of L (Teff ~2200 K to 1400 K) and T (Teff < 1300 K) dwarfs, we've obtained K- and L- band photometry with the Keck I telescope for a representative sample. These observations were motivated in part by our desire to understand the abundance of CH4 and H2O particularly at the L to T transition where CO reacts with H2 to produce these molecules. Here we present our most recent observations, discuss the trends we observe in color, and compare the Keck K and L' filters with the new Mauna Kea Observatory (MKO) K and L' filters.

Near Infrared Photometry of L and T Dwarfs [PDF - Type 1 fonts]

Near Infrared Photometry of L and T Dwarfs [PS]

Index Keywords: Brown Dwarfs; Spectral Classification; Near Infrared Photometry

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Manuscript submitted: 2001-Sep-06
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown, G. M. Harper, & T. R. Ayres. Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems, & The Sun,
© 2003 University of Colorado.