Predictions for high-frequency radio surveys of extragalactic sources

Details Predictions for high-frequency radio surveys of extragalactic sources Predictions for high-frequency radio surveys of extragalactic sources

2004-10-28

arxiv.org/abs/astro-ph/0410709v1

Astronomy and Astrophysics

Astrophysics

12 pages, 14 figures, to be published in A&A

Scientific paper

10.1051/0004-6361:20042108

We present detailed predictions of the contributions of the various source populations to the counts at frequencies of tens of GHz. New evolutionary models are worked out for flat-spectrum radio quasars, BL Lac objects, and steep-spectrum sources. Source populations characterized by spectra peaking at high radio frequencies, such as extreme GPS sources, ADAF/ADIOS sources and early phases of gamma-ray burst afterglows are also dealt with. The counts of different populations of star-forming galaxies (normal spirals, starbursts, high-z galaxies detected by SCUBA and MAMBO surveys, interpreted as proto-spheroidal galaxies) are estimated taking into account both synchrotron and free-free emission, and dust re-radiation. Our analysis is completed by updated counts of Sunyaev-Zeldovich effects in clusters of galaxies and by a preliminary estimate of galactic-scale Sunyaev-Zeldovich signals associated to proto-galactic plasma.

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