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SUMMARY:Looking for cool brown dwarfs in wide field surveys - Philippe Del
 orme (University of St Andrews)
DTSTART:20100125T160000Z
DTEND:20100125T170000Z
UID:TALK22071@talks.cam.ac.uk
CONTACT:Laurène Jouve
DESCRIPTION:I will present some results of our wide field survey brown dwa
 rf search.\nBrown dwarfs are in many ways the link between stars and plane
 ts and\ntheir atmospheres\, dominated by broad molecular absorption bands\
 , are\ncloser to planetary atmospheres than to stellar one.\nWe are lookin
 g for ultracool brown dwarfs\, whose effective temperature\nis below 700K\
 ,  using Wircam and MegaCam cameras on the CFHT telescope.\nBrown dwarfs s
 tands out among the millions of sources on the images\nbecause of their ex
 tremely red colours. Our objectives are to constrain\nultracool atmosphere
  physics by finding a large sample of  cool objects\nand  to put the\nfirs
 t constraints on the ultracool brown dwarf mass function.\n\nAfter a gener
 al introduction to brown dwarfs and wide fields surveys\, I\nwill describe
  our brown dwarfs selection techniques and present the\nspectra of some of
  the coolest brown dwarfs known to science.
LOCATION:MR14\, DAMTP\, Pav. F
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