A Biased Survey of the X-Ray Universe

Dr. Daniel Wik
Department of Physics and Astronomy
University of Utah

Energetic events and environments nearly ubiquitously emit X-ray light, from supernova explosions and their neutron star and black hole remnants, to supermassive black holes in the centers of galaxies, to galaxy clusters, the most massive bound objects in the universe.  They all produce both thermal and non-thermal X-rays through their interaction with intervening gas, offering clues about the processes affecting the formation and evolution of galaxies and clusters of galaxies.  I will introduce the constituents of the X-ray sky and review recent developments in the field, with a particular emphasis on what we've learned about galaxies and clusters from the first focusing hard X-ray telescope, NuSTAR.  Surveys of "empty" fields, massive clusters (with a focus on the Bullet cluster), and nearby galaxies (with a focus on the Andromeda galaxy, M31) will be discussed.