Infrared parallaxes for T/Y dwarfs from CFHTLS and UKIDSS

Details Infrared parallaxes for T/Y dwarfs from CFHTLS and UKIDSS Infrared parallaxes for T/Y dwarfs from CFHTLS and UKIDSS

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..180m&link_type=abstract

NOAO Proposal ID #2007A-0180

Physics

Scientific paper

The CFHTLS and UKIDSS surveys will provide the next leap in the identification of ultracool dwarfs in the solar neighborhood. These surveys have already identified a dozen of spectroscopically confirmed T dwarfs. Some of them may actually be Y dwarfs (cooler than T) but the spectra do not have enough quality to confirm the presence of ammonia. We propose to use ISPI on the 4m Blanco telescope to measure the parallaxes of these objects. Parallaxes are a fundamental piece of data that will allow to derive luminosities and temperatures and to test the possibility that some of them may be cooler than the coolest dwarfs found in 2MASS and SDSS. As a bonus, we will also obtain proper motions and improved photometry for the objects.

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