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METHOD:PUBLISH
BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20081118T000000
DTEND;TZID=Atlantic/Canary:20081118T010000
UID:iactalks-77
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/77
CREATED:2008-11-18T00:00:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Origin of space and time in a non-commutative cosmological model
DESCRIPTION:Origin of space and time in a non-commutative cosmological mode
 l\nDr. Carlos Hernández-Monteagudo\n\nThe amount of baryons seen in the l
 ocal Universe falls short by a factor2-5 if compared to the amount of dete
 cted baryons at intermediate (z~2)or high (z~1,100) redshift. This is the 
 so called "missing baryon" problem in Cosmology. Hydrodynamical simulation
 s of the large scale structure predict that most of those missing baryons 
 should be in the form of ionized gas present in slightly overdense regions
 , at a temperature ranging from 10^5 to 10^7 K, conforming the "Warm Hot I
 ntergalactic Medium" (WHIM). This WHIM would not form stars, and would not
  emit or absorb either in the IR, optical or UV. However, it should intera
 ct with the photons of the Cosmic Microwave Background (CMB) through two d
 ifferent channels: (i) Thompson scattering (where there is no energy excha
 nge) and (ii) Compton scattering (where hot electrons transfer energy to t
 he CMB photons, distorting their black body spectrum). I shall review the 
 status of the search for missing baryons in the context of CMB observation
 s and the currently most favored cosmological model. I shall also outline 
 new methods and prospects for detecting this missing gas with upcoming CMB
  experiments and address the link between the cosmic baryon problem and th
 e search for (so far undetected) bulk flows at scales of ~10 Mpc/h.\n\n
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