IRS Observations of the Brown Dwarf L and T Sequence

Details IRS Observations of the Brown Dwarf L and T Sequence IRS Observations of the Brown Dwarf L and T Sequence

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop...51h&link_type=abstract

Spitzer Proposal ID #51

Computer Science

Scientific paper

We examine the spectra of brown dwarfs in a study complementary to the IRS GTO proposal "IRS observations of the dwarf M-star sequence." These objects do not have sustained fusion, only temporary deuterium burning early in their evolution. L and T dwarfs are distinguished observationally by the presence of methane in the T dwarfs, but not the L dwarfs, which are too hot for methane to be stable. These observations use the IRS to observe several examples of each spectral subtype L0-L8, and T dwarfs of a variety of effective temperatures. These spectroscopic studes are important for 1) observing dust the atmospheres of these objects, which tells us about the chemical composition, temperature, and degree of convection on the object 2) observing molecular species in the atmospheres analogous to those observed in the Jovian planets of our own Solar System. The observations generally use the short-high and both low resolution modules.

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