The Mid-Infrared Spectra of Brown Dwarfs

Details The Mid-Infrared Spectra of Brown Dwarfs The Mid-Infrared Spectra of Brown Dwarfs

2003-10-28

arxiv.org/abs/astro-ph/0310805v1

Astronomy and Astrophysics

Astrophysics

14 pages, including 3 figures and 1 table. Submitted to ApJ Letters

Scientific paper

We present an analysis of brown dwarf model spectra in the mid-infrared spectral region (5 - 20 microns), in anticipation of data obtained with the Space Infrared Telescope Facility. The mid-infrared spectra of brown dwarfs are in several ways simpler than those in the near-infrared and yet provide powerful diagnostics of brown dwarf atmospheric physics and chemistry, especially when combined with ground-based data. We discuss the possibility of detection of new molecular species and of the silicate cloud, predict strong observational diagnostics for non-equilibrium chemistry between CO and CH4, and N2 and NH3, and speculate on the possibility of discovering brown dwarf stratospheres.

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