منابع مشابه
Observations of extended radio emission in clusters
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Context. The dying radio sources represent a very interesting and largely unexplored stage of the active galactic nucleus (AGN) evolution. They are considered to be very rare, and almost all of the few known ones were found in galaxy clusters. However, considering the small number detected so far, it has not been possible to draw any firm conclusions about their X-ray environment. Aims. We pres...
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We present new radio continuum observations of two dwarf starburst galaxies, NGC3125 and NGC5408, with observations at 4.80GHz (6cm) and 8.64GHz (3cm), taken with the Australia Telescope Compact Array (ATCA). Both galaxies show a complex radio morphology with several emission regions, mostly coincident with massive young star clusters. The radio spectral indices of these regions are negative (w...
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The main component of the intracluster medium (ICM) in clusters of galaxies is represented by the X-ray emitting thermal plasma. In addition, the presence of relativistic electrons and largescale magnetic fields in a fraction of galaxy clusters is demonstrated by the detection of largescale synchrotron radio sources, which have no optical counterpart and no obvious connection to the cluster gal...
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We use mock Sunyaev-Zel’dovich effect (SZE) maps to investigate how well the Planck mission might find and characterize clusters of galaxies. We discuss different combinations of frequency maps and different methods for identifying cluster candidates. The resulting catalogues are not complete even for relatively high mass thresholds, but the full sky nature of the mission ensures a large sample...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 2013
ISSN: 0004-6337
DOI: 10.1002/asna.201211852