Abstract
The presence of a significant population of relic relativistic electrons — created at an early epoch of the Universe — has been invoked to explain the diffuse EUV emission excess observed in a number of galaxy clusters. While the postulated inverse Compton scattering of the 3° K background radiation by cosmic ray electrons might indeed be utilized as an important diagnostic tool for the physical nature of the intracluster cosmic rays, it is shown here that continuous generation plus reacceleration would be necessary if the conditions on the observed energy spectral distribution and energy supply rate are to be met in the case of clusters with large radio halos.
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Ip, WH., Axford, W.I. (1999). Cosmic Rays And Clusters Of Galaxies. In: Büchner, J., Axford, I., Marsch, E., Vasyliūnas, V. (eds) Plasma Astrophysics And Space Physics. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4203-8_33
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DOI: https://doi.org/10.1007/978-94-011-4203-8_33
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