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Low frequency observations of radio relics and halos

Published online by Cambridge University Press:  07 April 2020

Ruta Kale Open the ORCID record for Ruta Kale [Opens in a new window]
Ruta Kale*
Affiliation:
National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, S. P. Pune University Campus, Ganeshkhind, Pune411007, India email: ruta@ncra.tifr.res.in
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Abstract

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Diffuse radio emission from galaxy clusters in the form of radio halos and relics are tracers of the shocks and turbulence in the intra-cluster medium. The imprints of the physical processes that govern their origin and evolution can be found in their radio morphologies and spectra. The role of mildly relativistic population of electrons may be crucial for the acceleration mechanisms to work efficiently. Low frequency observations with telescopes that allow imaging of extended sources over a broad range of low frequencies (<2 GHz) offer the best tools to study these sources. I will review the Giant Metrewave Radio Telescope (GMRT) observations in the past few years that have led to: i) statistical studies of large samples of galaxy clusters, ii) opening of the discovery space in low mass clusters and iii) tracing the spectra of seed relativistic electrons using the Upgraded GMRT.

Keywords

acceleration of particlesradiative mechanisms: non-thermalshock wavesturbulencegalaxies:clusters:general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S342: Perseus in Sicily: From Black Hole to Cluster Outskirts , May 2018 , pp. 37 - 43
Copyright
© International Astronomical Union 2020

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