Chandra X-ray & Hubble Optical/Infrared Images of GRB 150101B. A distant cosmic relative to the first source that astronomers detected in both gravitational waves and light may have been discovered. These images show Chandra data of this object, known as GRB 150101B, in context with a Hubble optical and infrared image of GRB 150101B. The observations from Chandra and other telescopes show that GRB 150101B share remarkable similarities to GW170817, the first source identified to emit both gravitational waves and light. This suggests these two sources are likely both associated with a merger of neutron stars. (Credit: X-ray: ASA/CXC/GSFC/UMC/E. Troja et al.; Optical and infrared: NASA/STScI.)
On the left, an optical image from the Digitized Sky Survey shows Cygnus X-1, outlined in a red box. Cygnus X-1 is located near large active regions of star formation in the Milky Way, as seen in this image that spans some 700 light years across. An artist's illustration on the right depicts what astronomers think is happening within the Cygnus X-1 system. Cygnus X-1 is a so-called stellar-mass black hole, a class of black holes that comes from the collapse of a massive star. The black hole pulls material from a massive, blue companion star toward it. This material forms a disk (shown in red and orange) that rotates around the black hole before falling into it or being redirected away from the black hole in the form of powerful jets. Credit Optical: DSS; Illustration: NASA/CXC/M.Weiss
Released 26 March 2.015, link to publication. Astronomers using observations from the NASA/ESA Hubble Space Telescope and NASA’s Chandra X-ray Observatory have studied how dark matter in clusters of galaxies behaves when the clusters collide. The results, published in the journal Science on 27 March 2015, show that dark matter interacts with itself even less… Sigue leyendo Dark matter even darker than once thought.