Extragalactic source contributions to arcminute-scale Cosmic Microwave Background anisotropies

Details Extragalactic source contributions to arcminute-scale Cosmic Microwave Background anisotropies Extragalactic source contributions to arcminute-scale Cosmic Microwave Background anisotropies

2004-10-25

arxiv.org/abs/astro-ph/0410605v2

Astron.Astrophys. 438 (2005) 475

Astronomy and Astrophysics

Astrophysics

7 pages, 3 figures, A&A in press

Scientific paper

10.1051/0004-6361:20042158

The possible contributions of the various classes of extragalactic sources (including, in addition to the canonical radio sources, GHz Peaked Spectrum sources, advection-dominated sources, starburst galaxies, high-redshift proto-spheroidal galaxies) to the arcminute scale fluctuations measured by the CBI, BIMA, and ACBAR experiments are discussed. At 30 GHz, fluctuations due to radio sources undetected by ancillary low-frequency surveys may be higher than estimated by the CBI and BIMA groups. High-redshift dusty galaxies, whose fluctuations may be strongly enhanced by the effect of clustering, could contribute to the BIMA excess signal, and dominate at 150 GHz (the ACBAR frequency). Moreover, in the present data situation, the dust emission of these high-redshift sources set an unavoidable limit to the detection of primordial CMB anisotropies at high multipoles, even at frequencies as low as $\simeq 30$ GHz. It is concluded that the possibility that the excess power at high multipoles is dominated by unsubtracted extragalactic sources cannot be ruled out. On the other hand, there is room for a contribution from the Sunyaev-Zeldovich effect within clusters of galaxies, with a density fluctuation amplitude parameter $\sigma_8$ consistent with the values preferred by current data.

Affiliated with

Also associated with

No associations

Rating

Extragalactic source contributions to arcminute-scale Cosmic Microwave Background anisotropies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Extragalactic source contributions to arcminute-scale Cosmic Microwave Background anisotropies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extragalactic source contributions to arcminute-scale Cosmic Microwave Background anisotropies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-477085