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Ray Tracing: Energetic cosmic rays linked to giant black holes
11-10-2007 · Science News OnlineNew observations suggest that ultrahigh-energy cosmic rays originate in the cores of nearby galaxies harboring supermassive black holes.
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Keywords: ray, tracing, energetic, cosmic, rays, linked, giant, black, holes, hole
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- Cosmic ray mystery solved?
11-08-2007 · EurekAlert!
The most energetic particles in the universe -- ultrahigh-energy cosmic rays -- likely come from supermassive black holes in the hearts of nearby active galaxies, says a study by scientists from nearly 90 research institutions worldwide, including the University of Utah.
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- Distant black holes may be source of high-energy cosmic rays
11-09-2007 · EurekAlert!
Breakthrough astrophysics research may have established the hitherto mysterious source of exceptionally high-energy cosmic ray emissions, according to recently published research that culminates a project developed by a scientist at the US Department of Energy's Argonne National Laboratory.
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- A new mechanism for producing cosmic gamma rays from starlight is proposed
03-19-2007 · EurekAlert!
In 2002, when astronomers first detected cosmic gamma rays coming from the constellation Cygnus, they were surprised and perplexed. The region lacked the extreme electromagnetic fields that they thought were required to produce such energetic rays. But now a team of theoretical physicists propose a mechanism that can explain this mystery and may also help account for another type of cosmic ray, the high-energy nuclei that rain down on Earth in the billions.
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- Chandra discovers light echo from the Milky Way's Black Hole
01-10-2007 · EurekAlert!
Like cold case investigators, astronomers have used NASA's Chandra X-ray Observatory to uncover evidence of a powerful outburst from the giant black hole at the Milky Way's center.
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- Astronomers discover new kind of black-hole explosion
12-20-2006 · EurekAlert!
Scientists have discovered what appears to be a new kind of cosmic explosion -- a "hybrid gamma-ray burst" -- which will be the subject of four articles to be published in the journal Nature on 21 December 2006. The scientists include four astrophysicists at Penn State University as well as others around the globe. The nature of the explosion is a puzzle in "virtually uncharted territory" for space scientists.
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- EuroNews looks at Integral
06-08-2007 · European Space Agency (ESA)
Integral is the first space observatory that can simultaneously observe objects in gamma rays, X-rays, and visible light. Its principal targets are gamma-ray bursts, powerful supernova explosions, and regions in the Universe thought to contain black holes. EuroNews talks to various scientists who are obtaining fascinating results from this laboratory.
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- Auger Observatory links highest-energy cosmic rays with violent black holes
11-08-2007 · EurekAlert!
Scientists of the Pierre Auger Collaboration, which includes New York University physics professor Glennys R. Farrar, have concluded that active galactic nuclei are the most likely candidate for the source of the highest-energy cosmic rays that hit Earth. Using the Pierre Auger Observatory in Argentina, a team of scientists from 17 countries found that the sources of the highest-energy particles are nearby galaxies that have active nuclei in their centers.
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- Black hole survey
11-18-2006 · Science News Online
Scanning the sky for high-energy X rays, a NASA satellite found more than 200 supermassive black holes within 400 million light-years of Earth.
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- Auger Observatory closes in on mystery, links highest-energy cosmic rays with violent black holes
11-08-2007 · EurekAlert!
The Pierre Auger Collaboration announced that active galactic nuclei are the most likely candidate for the source of the highest-energy cosmic rays that hit Earth. Using the Pierre Auger Observatory in Argentina, the team of scientists found that the sources of the highest-energy particles are not distributed uniformly across the sky. Instead, the Auger results link the origins of these mysterious particles to the locations of nearby galaxies that have active nuclei in their centers.
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- UO plays key role in LIGO's new view of a cosmic event
01-03-2008 · EurekAlert!
An international team of physicists, including University of Oregon scientists, has concluded that last February's intense burst of gamma rays possibly coming from the Andromeda Galaxy lacked a gravitational wave. That absence, they say, rules out an initial interpretation that the burst came from merging neutron stars or black holes within Andromeda.
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