Accurate Effective Temperatures for M, L, and T Dwarfs

Details Accurate Effective Temperatures for M, L, and T Dwarfs Accurate Effective Temperatures for M, L, and T Dwarfs

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40257r&link_type=abstract

Spitzer Proposal ID #40257

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Scientific paper

We will use a modified form of the infrared flux method to determine an accurate and consistent effective temperature scale for M, L, and T dwarfs. This work depends on the very accurate photometry available at 24 microns with MIPS and the consistent absolute calibration we have derived, good to 2% from 1 through 25 microns. The effective temperatures will provide a check of spectroscopic work by others (similarly to the use of the infrared flux method in studies of hotter stars). It should provide accurate temperatures across the L dwarf range where presently spectroscopic methods have difficulty because of the effects of atmospheric dust. Our method is also capable of identifying close binary pairs of brown dwarfs, and hence of testing the hypothesis that the peculiar behavior across the L/T transition is due to undetected binarity.

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