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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20100223T000000
DTEND;TZID=Atlantic/Canary:20100223T010000
UID:iactalks-88
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/88
CREATED:2010-02-23T00:00:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:The small scale angular anisotropy at 145 GHz as seen by the Atacam
 a Cosmology Telescope
DESCRIPTION:The small scale angular anisotropy at 145 GHz as seen by the At
 acama Cosmology Telescope\nDr. Carlos Hernández-Monteagudo\n\nThe Atacama
  Cosmology Telescope (ACT) has been observing the southern sky in the mill
 imeter range with an angular resolution at the arc-minute level. An analys
 is of 228 square degrees observed at 148 GHz along a stripe centered at de
 clination -53 degrees reveals the presence of the Silk damping tail in the
  temperature angular power spectrum of the Cosmic Microwave Background (CM
 B). This decaying tail becomes truncated by a rising spectrum at scales co
 rresponding to few arcmins (l ~ 3000) whose origin is compatible with a un
 clustered  population of unresolved point sources and some residual anisot
 ropy due to Compton scattering of CMB photons off free electrons (the Suny
 aev-Zel'dovich effect). Comparisons with other observations and constraint
 s on different components giving rise to this secondary spectrum are discu
 ssed.
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