2005A&A...438..475T


Query : 2005A&A...438..475T

2005A&A...438..475T - Astronomy and Astrophysics, volume 438, 475-480 (2005/8-1)

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

TOFFOLATTI L., NEGRELLO M., GONZALEZ-NUEVO J., DE ZOTTI G., SILVA L., GRANATO G.L. and ARGUEESO F.

Abstract (from CDS):

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 30GHz, 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 150GHz (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 ≃30GHz. 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 σ8 consistent with the values preferred by current data.

Abstract Copyright:

Journal keyword(s): cosmic microwave background - galaxies: general - radio continuum: galaxies

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 M 77 GiP 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4351 2
2 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1198 3

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2022.08.13-23:44:35

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