okt 252012
 
A Mini-Supermassive Black Hole in a Bulgeless Spiral Galaxy

  One of the lowest mass supermassive black holes ever observed in the middle of a galaxy has been identified, thanks to NASA’s Chandra X-ray Observatory and several other observatories. The host galaxy is of a type not expected to harbor supermassive black holes, suggesting that this black hole, while related to its supermassive cousins, [continue reading]

okt 242012
 
Our Milky Way's Black Hole Caught in a Flare-Up

  NASA’s newest set of X-ray eyes in the sky, the Nuclear Spectroscopic Telescope Array (NuSTAR), has caught its first look at the giant black hole parked at the center of our galaxy. The observations show the typically mild-mannered black hole during the middle of a flare-up. NuSTAR, has captured these first, focused views of [continue reading]

okt 132012
 
Stellar Winds in High-Speed Collision

  Two massive stars racing in orbit around each other have had their colliding stellar winds X-rayed for the first time, thanks to the combined efforts of ESA’s XMM-Newton and NASA’s Swift space telescopes. XMM-Newton observation of the core of the very massive cluster Cyg OB2 located in the constellation of Cygnus, 4700 light-years from [continue reading]

okt 092012
 
Cosmic Blender Churns Galaxy Cluster

  Scientists have used a suite of X-ray observations to find evidence of large scale swirling gas motion in the Perseus galaxy cluster. The Perseus Cluster, located 237 million light-years away in the constellation of Perseus, contains thousands of galaxies immersed in a vast cloud of multimillion degree gas. Image Credit: Jean-Charles Cuillandre (CFHT) & Giovanni [continue reading]

okt 062012
 
A New Black Hole in our Galaxy Discovered

  NASA’s Swift satellite recently detected a rising tide of high-energy X-rays from a source toward the center of our Milky Way galaxy. The outburst, produced by a rare X-ray nova, announced the presence of a previously unknown stellar-mass black hole.  Swift satellite discovers rare X-ray Nova and a black hole.Image Credit: NASA “Bright X-ray [continue reading]

okt 032012
 
Active Galaxies Avoid Living Near Centers of Galaxy Clusters

  A population study of active galaxies in X-rays shows that they get discouraged from living near the centers of galaxy clusters, and that there is an important interplay between gas inside and outside the galaxies. Chandra X-ray counts image for the galaxy cluster MACS J1931.8-2634 showing the diffuse X-ray emisstion from the hit cluster [continue reading]