no code implementations • 5 Jan 2021 • V. Cuciti, R. Cassano, G. Brunetti, D. Dallacasa, F. de Gasperin, S. Ettori, S. Giacintucci, R. Kale, G. W. Pratt, R. J. van Weeren, T. Venturi
We found that the fraction of radio halos drops from ~70% in high mass clusters to ~35% in the lower mass systems of the sample and we showed that this result is in good agreement with the expectations from turbulent re-acceleration models.
Cosmology and Nongalactic Astrophysics
no code implementations • 5 Jan 2021 • V. Cuciti, R. Cassano, G. Brunetti, D. Dallacasa, R. J. van Weeren, S. Giacintucci, A. Bonafede, F. de Gasperin, S. Ettori, R. Kale, G. W. Pratt, T. Venturi
The aim of this paper is to compile a well-selected sample of galaxy clusters with deep radio observations to perform an unbiased statistical study of the properties of radio halos.
Cosmology and Nongalactic Astrophysics
no code implementations • 28 Dec 2020 • K. Rajpurohit, G. Brunetti, A. Bonafede, R. J. van Weeren, A. Botteon, F. Vazza, M. Hoeft, C. J. Riseley, E. Bonnassieux, M. Brienza, W. R. Forman, H. J. A. Röttgering, A. S. Rajpurohit, N. Locatelli, T. W. Shimwell, R. Cassano, G. Di Gennaro, M. Brüggen, D. Wittor, A. Drabent, A. Ignesti
The compelling evidence for a steep spectral index, the existence of a spectral break above 1. 5 GHz, and the dependence of radio and X-ray surface brightness correlation on frequency are interpreted in the context of turbulent reacceleration models.
Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics
no code implementations • 10 Feb 2006 • F. Vazza, G. Tormen, R. Cassano, G. Brunetti, K. Dolag
We present a study of the turbulent velocity fields in the Intra Cluster Medium of a sample of 21 galaxy clusters simulated by the SPH--code Gadget2, using a new numerical scheme where the artificial viscosity is suppressed outside shocks.
