News tagged with gamma
Proposed gamma-ray laser could emit 'nuclear light'
(PhysOrg.com) -- Building a nuclear gamma-ray laser has been a challenge for scientists for a long time, but a new proposal for such a device has overcome some of the most difficult problems. In the new study, Eugene Tkalya ...
May 02, 2011 |
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Dark Matter May be Easier to Detect than Previously Thought
(PhysOrg.com) -- The Milky Way, like many other galaxies, is thought to be embedded in massive, lumpy amounts of dark matter that release gamma rays and other emissions. Although at first these emissions seem ...
Aug 10, 2009 |
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Single-Molecule Magnets Open New Door for Information Technology
(PhysOrg.com) -- Recent research by scientists in Italy and France shows that that single molecules have the ability to store information via their magnetic state. Their work is a first step toward a new generation ...
Mar 09, 2009 |
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Where do the highest-energy cosmic rays come from? Not from gamma-ray bursts, says IceCube study
The IceCube neutrino telescope encompasses a cubic kilometer of clear Antarctic ice under the South Pole, a volume seeded with an array of 5,160 sensitive digital optical modules (DOMs) that precisely track ...
Apr 18, 2012 |
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Fermi observations of dwarf galaxies provide new insights on dark matter
(PhysOrg.com) -- There's more to the cosmos than meets the eye. About 80 percent of the matter in the universe is invisible to telescopes, yet its gravitational influence is manifest in the orbital speeds ...
Apr 02, 2012 |
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Fermi shows that Tycho's star shines in gamma rays
(PhysOrg.com) -- In early November 1572, observers on Earth witnessed the appearance of a "new star" in the constellation Cassiopeia, an event now recognized as the brightest naked-eye supernova in more than ...
Dec 13, 2011 |
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Physicists set strongest limit on mass of dark matter
Brown University physicists have set the strongest limit for the mass of dark matter, the mysterious particles believed to make up nearly a quarter of the universe. The researchers report in Physical Review Le ...
Nov 23, 2011 |
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Challenge theoretical models, Crab pulsar beams most energetic gamma rays ever detected from a pulsar
A thousand years ago, a brilliant beacon of light blazed in the sky, shining brightly enough to be seen even in daytime for almost a month. Native American and Chinese observers recorded the eye-catching event. ...
Oct 06, 2011 |
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WISE mission captures black hole's wildly flaring jet
(PhysOrg.com) -- Astronomers using NASA's Wide-field Infrared Survey Explorer (WISE) have captured rare data of a flaring black hole, revealing new details about these powerful objects and their blazing jets. ...
Sep 21, 2011 |
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Brightest gamma ray on Earth -- for a safer, healthier world
The brightest gamma ray beam ever created- more than a thousand billion times more brilliant than the sun- has been produced in research led at the University of Strathclyde- and could open up new possibilities ...
Sep 19, 2011 |
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Fermi gamma-ray space telescope confirms puzzling preponderance of positrons
(PhysOrg.com) -- By finding a clever way to use the Earth itself as a scientific instrument, members of a SLAC-led research team turned the Fermi Gamma-ray Space Telescope into a positron detector – and ...
Sep 13, 2011 |
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Fermi's latest gamma-ray census highlights cosmic mysteries
(PhysOrg.com) -- Every three hours, NASA's Fermi Gamma-ray Space Telescope scans the entire sky and deepens its portrait of the high-energy universe. Every year, the satellite's scientists reanalyze all of ...
Sep 09, 2011 |
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Integral challenges physics beyond Einstein
(PhysOrg.com) -- ESA's Integral gamma-ray observatory has provided results that will dramatically affect the search for physics beyond Einstein. It has shown that any underlying quantum 'graininess' of space ...
Jun 30, 2011 |
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'Odd couple' binary makes dual gamma-ray flares
(PhysOrg.com) -- In December 2010, a pair of mismatched stars in the southern constellation Crux whisked past each other at a distance closer than Venus orbits the sun. The system possesses a so-far unique ...
Jun 29, 2011 |
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Unusual gamma-ray flash may have come from star being eaten by massive black hole
A bright flash of gamma rays observed March 28 by the Swift satellite may have been the death rattle of a star falling into a massive black hole and being ripped apart, according to a team of astronomers led ...
Jun 16, 2011 |
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