Stormy cluster weather could unleash black hole power and explain lack of cosmic cooling

ScienceDaily | 10/17/2019 | Staff
DanRules394 (Posted by) Level 3
Typical clusters of galaxies have several thousand member galaxies, which can be very different to our own Milky Way and vary in size and shape. These systems are embedded in very hot gas known as the intracluster medium (ICM), all of which live in an unseen halo of so-called 'dark matter'.

A large number of galaxies have supermassive black holes in their centres, and these often have high speed jets of material stretching over thousands of light years that can inflate very hot lobes in the ICM.

Researchers - Kavli - Institute - Cosmology - Institute

The researchers, based at the Kavli Institute for Cosmology and Institute of Astronomy, performed state-of-the-art simulations looking at the jet lobes in fine detail and the X-rays emitted as a result. The model captures the birth and cosmological evolution of the galaxy cluster, and allowed the scientists to investigate with unprecedented realism how the jets and lobes they inflate interact with a dynamic ICM.

They found that the mock X-ray observations of the simulated cluster revealed the so-called "X-ray cavities" and "X-ray bright rims" generated by supermassive black hole-driven jets, which itself is distorted by motions in the cluster, remarkably resemble those found in observations of real galaxy clusters.

Dr - Martin - Bourne - Institute - Astronomy

Dr Martin Bourne of the Institute of Astronomy in Cambridge led the team. He commented: "We have developed new computational techniques, which harness the latest high-performance computing technology, to model...
(Excerpt) Read more at: ScienceDaily
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