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SUMMARY:Detectable signature of first stars in 21-cm  - Anastasia Fialkov 
 (Tel Aviv University)
DTSTART:20121022T120000Z
DTEND:20121022T130000Z
UID:TALK39637@talks.cam.ac.uk
CONTACT:Camille Bonvin
DESCRIPTION:In this talk I will show that first stars at z~20 leave detect
 able signature in the redshifted 21-cm line of neutral hydrogen. Two effec
 ts  previously omitted in similar studies are responsible for a substantia
 l enhancement in the expected signal: the relative motion between the dark
  matter halos and the in-falling gas\, and the negative Lyman-Werner feedb
 ack of the starlight on star formation. I will explain how the two effects
  boost the power spectrum of the 21-cm signal thus making it more likely t
 o be detected. 
LOCATION:CMS\, Pav.B\, CTC Common Room (B1.19)
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