News tagged with accretion disk
VLBA locates superenergetic bursts near giant black hole
Jul 02, 2009 |
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(PhysOrg.com) -- Using a worldwide combination of diverse telescopes, astronomers have discovered that a giant galaxy's bursts of very high energy gamma rays are coming from a region very close to the supermassive ...
Erratic black holes regulate their growth (w/Videos)
Mar 25, 2009 |
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(PhysOrg.com) -- New results from NASA's Chandra X-ray Observatory have made a major advance in explaining how a special class of black holes may shut off the high-speed jets they produce. These results suggest ...
Polarizing filter allows astronomers to see disks surrounding black holes
Jul 23, 2008 |
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(PhysOrg.com) -- For the first time, a team of international researchers has found a way to view the accretion disks surrounding black holes and verify that their true electromagnetic spectra match what astronomers ...
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A jet of molecular hydrogen arising from a forming high-mass star
Mar 07, 2007 |
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A team of European astronomers offer new evidence that high-mass stars could form in a similar way to low-mass stars, that is, from accretion of gas and dust through a disk surrounding the forming star. Their ...
Infrared Image of Circumstellar Disk Illuminates Massive Star Formation Process
Nov 24, 2009 |
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(PhysOrg.com) -- A team of astronomers from Ibaraki University, Japan Aerospace Exploration Agency, Kanagawa University, University of Tokyo, Academica Sinica, and National Astronomical Observatory of Japan ...
How to Spot the Speediest Black Holes
Space & Earth / Space Exploration
May 28, 2007 |
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Astronomers are hunting an elusive target: rogue black holes that have been ejected from the centers of their home galaxies. Some doubted that the quarry could be spotted, since a black hole must be gobbling matter from an ...
Why Are Galaxies without Black Holes Uncommon?
May 30, 2007 |
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Recent calculations indicate that when two galaxies, and the supermassive black holes that lie at their centers, merge, these galactic 'marriages' frequently produce gravitational forces strong enough to kick the new combined ...
Ideas on gas-giant planet formation take shape
Mar 22, 2006 |
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Rocky planets such as Earth and Mars are born when small particles smash together to form larger, planet-sized clusters in a planet-forming disk, but researchers are less sure about how gas-giant planets such as Jupiter and ...
Young stellar objects: The source of gas emission around Herbig Ae/Be stars
Oct 10, 2008 |
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This week, Astronomy & Astrophysics is publishing new observations with AMBER/VLTI of the gas component in the vicinity of young stars. An international team of astronomers led by E. Tatulli (Grenoble, France) and S. Kra ...
Study confirms supermassive black holes produce powerful galaxy-shaping winds
Oct 31, 2007 |
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Supermassive black holes can produce powerful winds that shape a galaxy and determine their own growth, confirms a group of scientists from Rochester Institute of Technology.
Close-up movie shows hidden details in the birth of super-suns (w/ Video)
Nov 16, 2009 |
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(PhysOrg.com) -- The constellation of Orion is a hotbed of massive star formation, most prominently in the Great Nebula that sits in Orion's sword. The glowing gas of the Nebula is powered by a group of young ...
Researchers Test the Physics of Star Formation in the Lab
Nov 16, 2006 |
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The formation of stars and planets remains one of the big questions in astrophysical science. Currently, scientists do not understand the required conditions and the accretion, or matter collection process, ...
Dirty stars make good solar system hosts (w/ Video)
Oct 06, 2009 |
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Some stars are lonely behemoths, with no surrounding planets or asteroids, while others sport a skirt of attendant planetary bodies. New research published this week in The Astrophysical Journal Letters explains why the co ...
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