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Diffuse radio sources in galaxy clusters

Abstract : The knowledge on the origin of Radio Halos (Rhs), Mpc-scale low surface brightness diffuse radio emission observed in massive galaxy clusters, has moved towards a general consensus on the recent years. The generally accepted scenario for the mechanism responsible of this kind of diffuse emission is the re-acceleration of relativistic electrons by the turbulence generated in cluster mergers. On this framework, it is expected from models that a larger fraction of RH occurrence may appear at z=0.3-0.4. However, radio observations of galaxy clusters in this redshift regime are still limited. The MACS-Planck Radio Halo Cluster Project has the aim of exploring the origin and occurrence of RHs, as well as their connection with the dynamical state of the host systems by exploring a higher redshift range than previous studies. In this thesis, I present the published data of the ATCA subsample of the project and prospects for the future work.
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Submitted on : Thursday, March 1, 2018 - 11:57:08 AM
Last modification on : Monday, October 12, 2020 - 11:10:19 AM
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  • HAL Id : tel-01720462, version 1



Gerardo Martinez Aviles. Diffuse radio sources in galaxy clusters. Astrophysics [astro-ph]. Université Côte d'Azur, 2017. English. ⟨NNT : 2017AZUR4076⟩. ⟨tel-01720462⟩



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