Primordial magnetic fields with X-ray and Sunyaev-Zel’divich cluster surveys
نویسندگان
چکیده
منابع مشابه
X-ray Constraints on Cluster Magnetic Fields
Lower limits to the intracluster magnetic field are derived from modeling broad band X-ray spectra of 6 galaxy clusters with radio halos (A401, A754, A1367, Coma (A1656), A2256, and A2319). The 0.7 10 keV spectra for all clusters were obtained with the Advanced Satellite for Cosmology and Astrophysics (ASCA) Gas Imaging Spectrometer (GIS). For A401, A754, A1367, and A1656, data from the HEAO1-A...
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Hydrodynamical simulations are used in combination with the PressSchechter expression to simulate Sunyaev-Zel’dovich (SZ) galaxy cluster sky maps. These are used to gauge the ability of future SZ observations to provide information about the cosmological parameters H0, ΩM, and the gas fraction fg in clusters. This work concentrates on prospects for AMI, the Arcminute MicroKelvin Imager, a new t...
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The explanation of the observed galactic magnetic fields may require the existence of a primordial magnetic field. Such a field may arise during the early cosmological phase transitions, or because of other particle physics related phenomena in the very early universe reviewed here. The turbulent evolution of the initial, randomly fluctuating microscopic field to a large-scale macroscopic field...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2012
ISSN: 0035-8711
DOI: 10.1111/j.1365-2966.2012.21239.x