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]

sep 122012
 
Massive Star Has Extreme Large Magnetic Field

  A group of astronomers led by Gregg Wade of the Royal Military College of Canada have used the Hobby-Eberly Telescope (HET) at The University of Texas at Austin’s McDonald Observatory and the Canada-France Hawaii Telescope (CFHT) on Hawaii’s Mauna Kea to measure the most magnetic massive star yet. Their work is published in yesterday’s [continue reading]

jul 272012
 
The Brightest Stars Have a Close Companion

A new study using the European Southern Observatory’s (ESO) Very Large Telescope (VLT) has shown that most very bright high-mass stars, which drive the evolution of galaxies, do not live alone. Almost three-quarters of these stars are found to have a close companion star, far more than previously thought. Surprisingly most of these pairs are [continue reading]

mei 312012
 
There's More Star-Stuff Out There But It's Not Dark Matter

  More atomic hydrogen gas – the ultimate fuel for stars – is lurking in today’s Universe than we thought, CSIRO astronomer Dr Robert Braun has found. A radio image of  the Large Magellanic Cloud, made with CSIRO radio telescopes. The bright areas are where the most atomic hydrogen gas is found. Image credit: S. Kim [continue reading]

mei 052012
 
The Most Distant Protocluster of Galaxies Discovered

Using the Subaru Telescope, a team of astronomers led by Jun Toshikawa (The Graduate University for Advanced Studies, Japan), Dr. Nobunari Kashikawa (National Astronomical Observatory of Japan), and Dr. Kazuaki Ota (Kyoto University) has discovered the most distant protocluster of galaxies ever found–one that existed less than one billion years after the Big Bang. Since [continue reading]