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New season of colloquia at the Institute of Radioastronomy

We are starting a new season of colloquia at the Institute of Radioastronomy. Our first talk will be next Monday, 23/9, at 14:30 in the meeting room (4th floor), as usual. Please find below, speaker, title, and abstract:


Dr. Ruta Kale (INAF IRA)

"Diffuse radio emission in galaxy clusters: surveys and new detections"

Abstract: Radio halos, radio relics and mini-halos are forms of diffuse radio emission in galaxy clusters giving an insight to the non-thermal processes in the intra-cluster medium.

The origins of these sources continue to puzzle theorists and observers although the understanding of these sources is growing. The Extended GMRT Radio Halo Survey aims to provide statistical properties of radio halos in a large sample of galaxy clusters.

I will present recent results from this survey which is nearing completion. The massive clusters detected by the Planck satellite and other instruments (ACT, SPT) using the Sunyaev Ze'ldovich effect are favoured hosts for diffuse radio emission. We have carried out a follow-up of Planck detected clusters with the GMRT and the JVLA to confirm the presence of suspected diffuse emission.

I will present the detections of a radio halo and a candidate new radio relic with the JVLA at 1.5 GHz and the GMRT at 610 and 240 MHz.


  • Monday 30/9, h. 14:30 (joint with IASF) Dr. Michalowski
  • Monday 21/10, h. 14:30 Dr. Yutaka Fujita (Osaka University, Japan) Stable Heating of Cluster Cool Cores by Cosmic-Rays and Non-thermal Emissions
  • Friday 25/10, h. 14:00 Dr. Tuomas Savolainen (MPIfR, Bonn)
  • Monday 4/11, h. 14:30 ALMA Regional Center
Published on 16 September 2013