Discovery Of Two 4.5 Micron Selected Field Late-t Dwarfs

Details Discovery Of Two 4.5 Micron Selected Field Late-t Dwarfs Discovery Of Two 4.5 Micron Selected Field Late-t Dwarfs

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21340604g&link_type=abstract

American Astronomical Society, AAS Meeting #213, #406.04; Bulletin of the American Astronomical Society, Vol. 41, p.199

Astronomy and Astrophysics

Astronomy

Scientific paper

We report the the discovery of two cool field brown dwarfs using 3.6 and 4.5 micron data from the Spitzer Deep Wide Field Survey (SDWFS). The objects were selected to have [4.5] < 18.5 and [3.6] - [4.5] < 1.5 on the Vega system. The spectral energy distributions including near infrared J and H photometry imply spectral classes of T6 and T7 for the two objects. The proper motions for both objects are < 0.5 arcsec/year, consistent with expectations for luminosity inferred distances of > 30 pc. No objects redder than these in [3.6] - [4.5] were found. Implications for the numbers of Y dwarfs likely to be found in larger area Spitzer warm mission surveys and by WISE are discussed.

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