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Proceedings Paper

NIRSPEC brown dwarf spectroscopic survey
Author(s): Mavourneen K. Wilcox; Ian S. McLean; Eric E. Becklin; Donald Frank Figer; Andrea M. Gilbert; James R. Graham; James E. Larkin; N. A. Levenson; Harry I. Teplitz; J. Davy Kirkpatrick; Adam J. Burgasser
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Paper Abstract

The NIRSPEC Brown Dwarf Spectroscopic Survey is a project to obtain a consistent set of high-quality near-IR spectra for each spectral class and sub-class of low-mass and/or sub- stellar objects to provide a new data base for models of the atmosphere of brown dwarfs and extra-solar giant planets. Most of the current targets are L-dwarfs and T-dwarfs discovered by the 2MASS. The survey is begin performed with the recently-commissioned near-IR spectrometer, NIRSPEC, a 1-5 micrometers cryogenic spectrograph at the WM Keck Observatory on Mauna Kea, using resolving powers of R equals 2,500-25,000. Preliminary results for four sources, three L-dwarfs and one T-dwarf, are presented here. Spectra from 1.13-2.33 micrometers at an average resolution of R equals 2,500 illustrate the development of deep steam bands and the weakening of FeH through the L-sequence, and the emergence of methane bands in the T-dwarfs. Complex detail in the spectra are the result of blending of numerous unresolved molecular transitions.

Paper Details

Date Published: 29 June 2000
PDF: 5 pages
Proc. SPIE 4005, Discoveries and Research Prospects from 8- to 10-Meter-Class Telescopes, (29 June 2000); doi: 10.1117/12.390148
Show Author Affiliations
Mavourneen K. Wilcox, Univ. of California/Los Angeles (United States)
Ian S. McLean, Univ. of California/Los Angeles (United States)
Eric E. Becklin, Univ. of California/Los Angeles (United States)
Donald Frank Figer, Space Telescope Science Institute (United States)
Andrea M. Gilbert, Univ. of California/Berkeley (United States)
James R. Graham, Univ. of California/Berkeley (United States)
James E. Larkin, Univ. of California/Los Angeles (United States)
N. A. Levenson, Johns Hopkins Univ. (United States)
Harry I. Teplitz, NASA Goddard Space Flight Ctr. (United States)
J. Davy Kirkpatrick, California Institute of Technology (United States)
Adam J. Burgasser, California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 4005:
Discoveries and Research Prospects from 8- to 10-Meter-Class Telescopes
Jacqueline Bergeron, Editor(s)

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