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Title:
L-Band Photometry of L and T Dwarfs
Authors:
Stephens, Denise C.; Marley, Mark S.; Noll, Keith S.; Chanover, Nancy
Affiliation:
AA(Astronomy Department, New Mexico State University, Box 30001, MSC 4500, Las Cruces, NM 88012; ), AB(Space Sciences Division, NASA/Ames Research Center, Moffett Field, CA 94035; and Astronomy Department, New Mexico State University, Box 30001, MSC 4500, Las Cruces, NM 88012; ), AC(Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218; ), AD(Astronomy Department, New Mexico State University, Box 30001, MSC 4500, Las Cruces, NM 88012; )
Publication:
The Astrophysical Journal, Volume 556, Issue 2, pp. L97-L101. (ApJL Homepage)
Publication Date:
08/2001
Origin:
UCP
ApJ Keywords:
Stars: Low-Mass, Brown Dwarfs
DOI:
10.1086/322938
Bibliographic Code:
2001ApJ...556L..97S

Abstract

We present K- and L-band photometry obtained with the Keck I telescope for a representative sample of L and T dwarfs. These observations were motivated in part by the dominant role H2O and CH4 play in shaping the flux near 2 and 3 μm and by the potential use of these bands as indicators of spectral class in the infrared. In addition, these observations aid the determination of the bolometric luminosity of L and T dwarfs. Here we report the K, L', and Ls magnitudes of our objects and the trends observed in the (K-L') and (K-Ls) colors as a function of L and T dwarf spectral class. We compare these colors with theoretical models, derive a relationship between effective temperature and L spectral class, and compare our temperature estimates with others.
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