Expected Counts of Galaxy Cluster Radio Halos in Low-Frequency Radio Surveys

Details Expected Counts of Galaxy Cluster Radio Halos in Low-Frequency Radio Surveys Expected Counts of Galaxy Cluster Radio Halos in Low-Frequency Radio Surveys

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.2102r&link_type=abstract

American Astronomical Society, AAS Meeting #212, #21.02; Bulletin of the American Astronomical Society, Vol. 40, p.218

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We present a first estimate based on a cosmological gasdynamics simulation of galaxy cluster radio halo counts to be expected in forthcoming low-frequency radio surveys. Our estimate is based on a FLASH simulation of the ΛCDM model for which we have generated mock radio sky maps by using the observed X-ray-radio correlation for clusters to normalize projections of the turbulent gas pressure <ρv2>. Under the assumption that acceleration of the cosmic rays responsible for radio halos takes place due to intracluster turbulence, the radio surface brightness distribution should trace this quantity. Appropriate observational scatter and cold-core corrections are included.

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