| Expected Number Counts of Radio Galaxy Clusters |
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| 作者姓名： | Wei Zhou National Astronomical Observatories Chinese Academy of Sciences Beijing |
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| 作者单位： | Wei Zhou National Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012 |
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| 摘 要： | 1 INTRODUCTION Over the past years, diffuse radio halos have been detected in a few tens of nearby, richclusters. They often extend to a distance of 1 Mpc from the cluster centers, and have regularshape, low surface brightness and steep radio spectrum. Some clusters also contain peculiarradio structures called radio relics. Both radio halos and relics are believed to arise from themerging of sub-cluster structures (Buote 2001). The first radio halo, Coma C, was detected about 30 years a…
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| 关 键 词： | 银河系 弥漫星云 宇宙论 无线电源 |
Expected Number Counts of Radio Galaxy Clusters |
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| Wei Zhou National Astronomical Observatories,Chinese Academy of Sciences,Beijing .Expected Number Counts of Radio Galaxy Clusters[J].Chinese Journal of Astronomy and Astrophysics,2002,2(2):106-111. |
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| Authors: | Wei Zhou |
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| Institution: | NationalAstronomicalObservatories,ChineseAcademyofSciences,Beijing100012 |
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| Abstract: | Clusters of galaxies may contain radio sources if they still experience successive mergers at present. This has been confirmed by radio observations that about 30% of nearby clusters possess radio halos. We present a theoretical prediction of radio cluster counts using a semi-analytic approach which incorporates the empirical correlation between radio power and dynamical mass of clusters, and the cluster mass function described by the press-Schechter formalism. The total population of radio clusters over the whole sky and their redshift distribution are given. |
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| Keywords: | cosmology: theory-galaxies: cluster: general-radio sources:extended |
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