Abstract Details
| Name: Ruta Kale Affiliation: NCRA-TIFR Conference ID: ASI2018_427 Title : Clusters of galaxies with the Upgraded GMRT Authors and Co-Authors : Ruta Kale (National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune) Abstract Type : Invited Abstract Category : Plenary Abstract : Clusters of galaxies are the largest gravitationally-bound systems in the Universe composed of dark matter, galaxies and diffuse intra-cluster medium (ICM). Fundamental questions of the non-thermal energy content in the ICM and the role of ICM in the evolution of embedded radio sources are still not answered. Extended radio sources associated with cluster galaxies and those associated with the ICM itself are the direct probes of the non-thermal components, namely, the magnetic field and cosmic rays. The feedback at the cluster core and the merging of sub-clusters stir the ICM and drive shocks and turbulence in it. Thus galaxy clusters are ideal laboratories to study the evolution of radio galaxy lobes in dense environments, the acceleration of particles in shocks and turbulence and the amplification of magnetic fields. These phenomena leave imprints on the radio spectra and can be probed by detailed spatial and spectral study in radio bands. The Upgraded Giant Metrewave Radio Telescope (U-GMRT) has key capabilities that are well suited to study radio source evolution in clusters. The broadband spectral coverage and the corresponding enhancement in the sampling of extended sources provide an unprecedented view of the spectral morphology of extended cluster radio sources. I will present results from our application of U-GMRT observations of galaxy clusters to probe the physical conditions in relic radio sources and particle acceleration in the ICM. |