Dear All,
There will be an NCRA Colloquium by Andrea Botteon at 4 PM on Monday, April 28, 2025, in the NCRA Auditorium. The colloquium will also be broadcast over Zoom.
The Zoom details are:
https://zoom.us/j/98059891418?pwd=Q04DqpEzp8KcZmgBJah8z51w0hdIEn.1
Meeting ID: 980 5989 1418
Passcode: 547696
The Zoom session will be opened at ~3:45 PM, IST. Please do join the session at least a few minutes before 4:00 PM.
The colloquium details are below.
Best wishes,
Nissim
---------------------------------------------
Venue : NCRA Auditorium and Zoom
Date : 28/4/2025
Time : 4 PM
Speaker : Andrea Botteon (INAF-IRA, Bologna, Italy)
Title : Galaxy clusters in the golden age of radio astronomy
Abstract: Galaxy clusters are the largest gravitationally bound structures in the Universe. Radio observations have revealed the presence of diffuse radio sources associated with the intra-cluster medium which probe the existence of cosmic rays and magnetic fields distributed over Mpc scales. Despite significant progress in understanding extended synchrotron emission in clusters, key questions remain regarding the particle acceleration mechanisms operating in the dilute intra-cluster plasma. In this talk, I will review the observational evidence for the processes responsible for generating diffuse radio emission in clusters, including radio halos and relics. I will discuss their connection to cluster-scale phenomena such as mergers, turbulence, and shocks, as well as the role of magnetic fields and fossil relativistic electrons in the intra-cluster medium. Finally, I will highlight recent results from state-of-the-art radio instruments that introduce new challenges for modeling particle acceleration and magnetic field amplification in these extreme environments.