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SUMMARY:Cosmological insight from our neighbour\, the Andromeda galaxy - S
 cott Chapman (IoA)
DTSTART:20071105T130000Z
DTEND:20071105T140000Z
UID:TALK8157@talks.cam.ac.uk
CONTACT:Antony Lewis
DESCRIPTION:Cosmology can be tested by "near-field" studies. Highlights fr
 om our recent Keck spectroscopic survey of Andromeda include (1) a giant e
 xtended disk out to 90kpc\; (2) an underlying "smooth" metal-poor halo\; (
 3) a rogue dwarf galaxy\, And-XII\, which appears to be arriving at the Lo
 cal Group virial radius on its first infall: it is a pristine fossil. Thes
 e three discoveries are used to discuss near-field cosmological issues:\n-
 what is the Dark Matter extent\, nature\, spatial distribution?\n-where/wh
 at are the missing satellites?\n-are DM profiles universal? (cuspy NFW?)\n
 -how were MW and M31 constructed: are they typical disks?\n-what is the ro
 le of accretion in forming the halo\, disk\, bulge?\n
LOCATION:CMS\, Pav.B\, First Floor Common Room (B1.19)
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