Christopher Riseley – The Conversation

Screenshot at.

February 15, 2023

The largest structures in the Universe are still glowing with the shock of their creation

Tessa Vernstrom, The University of Western Australia and Christopher Riseley, Università di Bologna

Astronomers have detected a radio glow caused by shockwaves in the gigantic filaments between galaxy clusters in the ‘cosmic web’ which pervades the Universe.

The colliding cluster Abell 3266 as seen across the electromagnetic spectrum, using data from ASKAP and the ATCA (red/orange/yellow colours), XMM-Newton (blue) and the Dark Energy Survey (background map). Christopher Riseley (Università di Bologna)

July 31, 2022

We found some strange radio sources in a distant galaxy cluster. They’re making us rethink what we thought we knew.

Christopher Riseley, Università di Bologna and Tessa Vernstrom, The University of Western Australia

One of the objects is a ‘fossil’ radio source – a leftover from the death of a supermassive black hole that once shot out huge jets of plasma.

Contact Christopher for