منابع مشابه
A morphological comparison between giant radio halos and radio mini–halos in galaxy clusters
In this letter we present a morphological comparison between giant radio halos and radio mini-halos in galaxy clusters based on radio–X-ray luminosity, P1.4-LX, and radio luminosity-size, P1.4-RH, correlations. We report evidence that P1.4-LX and P1.4-RH trends may also exist for mini–halos: mini–halo clusters share the same region of giant halo clusters in the (P1.4, LX) plane, whereas they ar...
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Context. The Intra-Cluster Medium is characterized by thermal emission, and by the presence of large scale magnetic fields. In some clusters of galaxies a diffuse non-thermal emission is also present, located at the cluster center and named radio halo. These sources indicate the existence of relativistic particles and magnetic fields in the cluster volume. Aims. In this paper we collect data on...
متن کاملCosmic Rays in Clusters of Galaxies and Radio Halos
We calculate the fluxes of radio, hard X-rays and gamma ray emission from clusters of galaxies, in the context of a secondary electron model (SEM). In the SEM the radiating electrons are produced by the decay of charged pions in cosmic ray (CR) interactions with the intracluster medium, while gamma ray emission is mainly contributed by the decay of neutral pions. We specifically applied our cal...
متن کاملRevisiting Scaling Relations for Giant Radio Halos in Galaxy Clusters
Many galaxy clusters host Megaparsec-scale radio halos, generated by ultrarelativistic electrons in the magnetized intracluster medium. Correlations between the synchrotron power of radio halos and the thermal properties of the hosting clusters were established in the last decade, including the connection between the presence of a halo and cluster mergers. The X-ray luminosity and redshift limi...
متن کاملNon Thermal Emission from Galaxy Clusters: Radio Halos
The number of diffuse radio halos in clusters of galaxies has grown in recent years, making it possible to derive statistical properties of these sources and of the hosting clusters. We show that diffuse sources are associated with X-ray luminous clusters which have undergone recent merger processes. The radio and X-ray structures are often similar, and correlations are found between radio and ...
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ژورنال
عنوان ژورنال: Highlights of Astronomy
سال: 2002
ISSN: 1539-2996
DOI: 10.1017/s1539299600014234