Marcus Brüggen

TL;DR: The morphology of the X-ray and radio-emitting features in the central ~50 kpc region around the galaxy M87 strongly suggests that buoyant bubbles of cosmic rays (inflated by an earlier nuclear active phase of the galaxy) rise through the cooling gas at roughly half the sound speed as mentioned in this paper.

TL;DR: The detection of a megaparsec-scale radio relic showing all the properties of diffusive shock acceleration expected at radio wavelengths suggests that this acceleration mechanism operates on scales larger than those of supernova remnants and implies that merging clusters of galaxies can accelerate particles to energies much higher than those achieved in supernova remnant.

TL;DR: A central question in galaxy evolution is the degree to which this process has caused the decline of star formation in large elliptical galaxies, which typically have little cold gas and few young stars, unlike spiral galaxies.

TL;DR: In this paper, the first 3D hydrodynamical simulations of ram pressure stripping of a disc galaxy orbiting in a galaxy cluster were presented, where the authors focused on the evolution of the radius and mass of the remaining gas disc.