News tagged with active galactic nuclei
Related topics: galaxies , astrophysical journal , supermassive black hole , black holes
On the deceleration behaviour of black holes
(PhysOrg.com) -- Researchers use the concept of "anti-kick" to explain why the speed suddenly decreases after the collision of such exotic objects.
Jun 04, 2010 |
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The turbulent past of the Milky Way's black hole
The supermassive black hole at the center of our Galaxy went through turbulent times over the past centuries. We know this thanks to its surrounding molecular clouds, whose varying X-ray and gamma-ray luminosity ...
May 28, 2010 |
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Supermassive black holes may frequently roam galaxy centers
A team of astronomy researchers at Florida Institute of Technology and Rochester Institute of Technology in the United States and University of Sussex in the United Kingdom, find that the supermassive black ...
May 25, 2010 |
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How do supermassive black holes get so big?
(PhysOrg.com) -- At the center of most galaxies lie supermassive black holes that can grow to become more than a billion times larger than our Sun. However, astrophysicists don’t fully understand the formation ...
Apr 26, 2010 |
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Black hole spin may create jets that control galaxy
(PhysOrg.com) -- Scattered throughout every galaxy are black holes, regions that gobble up matter and energy. Although we can't see black holes, scientists can infer their size, location and other properties ...
Feb 11, 2010 |
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Surveying the X-ray Sky
(PhysOrg.com) -- Astronomers have only modest laboratories to probe the mysteries of the cosmos. Mostly they have to rely on meticulous and clever observations of remote phenomena.
Jan 11, 2010 |
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Galaxy History Revealed in This Colorful Hubble View (w/ Video)
(PhysOrg.com) -- More than 12 billion years of cosmic history are shown in this unprecedented, panoramic, full-color view of thousands of galaxies in various stages of assembly.
Jan 06, 2010 |
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Massive Black Hole Implicated in Stellar Destruction
(PhysOrg.com) -- New results from NASA's Chandra X-ray Observatory and the Magellan telescopes suggest that a dense stellar remnant has been ripped apart by a black hole a thousand times as massive as the ...
Jan 04, 2010 |
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Scientists observe super-massive black holes using Keck Observatory in Hawaii
An international team of scientists has observed four super-massive black holes at the center of galaxies, which may provide new information on how these central black hole systems operate. Their findings ...
Dec 10, 2009 |
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RIT astronomer mines Spitzer Space Telescope data for massive starbursts
Understanding the evolution of galaxies is one of the biggest questions confronting astronomers today. Looking at distant astronomical objects gives scientists important clues to the origins of the Milky Way Galaxy and other ...
Dec 08, 2009 |
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Maps Unveil the Source of Starburst Galaxy's Winds
(PhysOrg.com) -- A research group at Kyoto University has discovered that shocks are the primary energy sources that excite the galactic wind region of starburst galaxy NGC 253. Their images of the center ...
Nov 18, 2009 |
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X-Ray Jets from Galaxies
(PhysOrg.com) -- Some dramatic galaxies eject gigantic, collimated jets of ionized gas millions of light-years long, powered by the massive black holes at their centers. The ionized jets are detected at radio ...
Oct 19, 2009 |
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Researcher uses 100,000 degree heat to study plasma
Using one of the greatest sources of radiation energy created by man, University of Nevada, Reno researcher and faculty member Roberto Mancini is studying ultra-high temperature and non-equilibrium plasmas ...
Sep 02, 2009 |
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Galactic nuclei offer some indication of axionlike particles
(PhysOrg.com) -- “Axionlike particles are interesting because they come up regularly when scientists study string theory. By looking at their properties, you hope to learn about string theory, or some other unified theory ...
May 28, 2009 |
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