Resonant scattering of X-ray emission lines in the hot intergalactic medium - Astrophysics > High Energy Astrophysical PhenomenaReport as inadecuate




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Abstract: While very often a hot intergalactic medium IGM is optically thin tocontinuum radiation, the optical depth in resonant lines can be of order unityor larger. Resonant scattering in the brightest X-ray emission lines can causedistortions in the surface brightness distribution, spurious variations in theabundance of heavy elements, changes in line spectral shapes and evenpolarization of line emission. The magnitude of these effects not only dependson the density, temperature and ionization state of the gas, but is alsosensitive to the characteristics of the gas velocity field. This opens apossibility to use resonant scattering as a convenient and powerful tool tostudy IGM properties. We discuss the application of these effects to galaxyclusters.



Author: E. Churazov, I. Zhuravleva, S. Sazonov, R. Sunyaev

Source: https://arxiv.org/







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