The Late-T Dwarf Population Revealed by WISE

Details The Late-T Dwarf Population Revealed by WISE The Late-T Dwarf Population Revealed by WISE

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21933001m&link_type=abstract

American Astronomical Society, AAS Meeting #219, #330.01

Astronomy and Astrophysics

Astronomy

Scientific paper

We present over 150 spectroscopically confirmed T dwarfs discovered by the Wide-field Infrared Survey Explorer (WISE). More than 100 of these new discoveries have spectral types ≥ T6, nearly tripling the known sample. Using spectral indices, spectrophotometric colors, and the atmosphere models of Marley & Saumon, we discuss the late-T dwarfs as a population. The characteristics of the "average" late-T dwarf are considered and are compared to spectral standards in the literature. Once this has been done, we can discuss the outliers in terms of gravity and metallicity indicators. Finally, we review the classification of the latest dwarfs in our sample (T9-9.5) in the context of the new Y dwarf spectral class.

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