Ultracool Dwarfs in the Ukirt Infrared Deep Sky Survey (UKIDSS)

Details Ultracool Dwarfs in the Ukirt Infrared Deep Sky Survey (UKIDSS) Ultracool Dwarfs in the Ukirt Infrared Deep Sky Survey (UKIDSS)

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.6903b&link_type=abstract

American Astronomical Society Meeting 210, #69.03; Bulletin of the American Astronomical Society, Vol. 39, p.176

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The UKIRT Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) presents an unparallelled resource for the study of field brown dwarfs. The UKIDSS Cool Dwarf Science Working Group (CDSWG) is carrying out a search for the lowest temperature brown dwarfs ever discovered, with the possibility of identifying a new spectral class of ultracool dwarf: the Y dwarf. CDSWG members identified 10 new T dwarfs in the early and first data releases of the LAS, including 2 objects with spectral types later than T7.5. One of these is thought to be the coolest T dwarf ever found with a spectral type of T8.5, and an estimated temperature of 650K. Data release 2 (DR2) took place on 1st March 2007, and already the most promising objects have been selected and followed-up photometrically and spectroscopically. In this contribution I will discuss the capabilities of UKIDSS for identifying ultracool dwarfs and summarise our latest results.

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