Clouds and Chemistry: Probing the Atmospheres of Ultracool Dwarfs with Spitzer

Details Clouds and Chemistry: Probing the Atmospheres of Ultracool Dwarfs with Spitzer Clouds and Chemistry: Probing the Atmospheres of Ultracool Dwarfs with Spitzer

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..384..111c&link_type=abstract

14th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun ASP Conference Series, Vol. 384, proceedings of the conferen

Physics

Scientific paper

The launch of the has opened a heretofore untapped wavelength range fore the study of ultracool dwarfs. Absorption bands of H_2O, CO, CH_4, and NH_3 shape their emergent spectra from 3 to 15 μm and provide important insights into the chemistry and dynamics of ultracool dwarf atmospheres. In this contribution, I will review what has been learned to date from Spitzer spectroscopy of M, L, and T dwarfs. In particular I will discuss the tentative direct detection of the silicate clouds that form in the atmospheres of L dwarfs and the detection of non-equilibrium affects on the abundance of NH_3.

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