Program: GS-2006A-Q-16
| Title: | Spectroscopic Investigation of Three Exceptionnally Cool Brown Dwarf Candidates |
| PI: | Loic Albert |
| Co-I(s): | Thierry Forveille, Rene Doyon, Etienne Artigau, Chris Willott |
Abstract
The CFHT Legacy Survey (CFHTLS) is starting to deliver a goldmine of
information. A search covering 37 square degrees has isolated about 25 red
objects, most of which are probably T dwarfs or dwarfs at the L-T transition.
Among those, three exceptionally red objects with i-z>4 are redder than the
coldest T dwarf known (GJ570D, 750 K) and could well be the the first
candidates of a new class of BDs - the Y dwarfs - expected to harbor ammonia
absorption bands. We propose to obtain cross-dispersed spectra with GNIRS on
these 3 targets (H=19.7,19.1,17.2) to assess their temperature and look for ammonia
spectral features.
Publications using this program's data
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[data]
[ADS] The extinction law at high redshift and its implications
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[data]
[ADS] 37 New T-type Brown Dwarfs in the Canada-France Brown Dwarfs Survey
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[data]
[ADS] The dust attenuation law in z 6 quasars
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[data]
[ADS] Four Quasars above Redshift 6 Discovered by the Canada-France High-z Quasar Survey
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[data]
[ADS] Eddington-limited Accretion and the Black Hole Mass Function at Redshift 6
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[data]
[ADS] Finding ultracool brown dwarfs with MegaCam on CFHT: method and first results