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Latest Gamma-ray astronomy Stories

Looking At Magnetic Fields Of Gamma-ray Bursts
2013-12-04 16:25:22

NASA A new study using observations from a novel instrument provides the best look to date at magnetic fields at the heart of gamma-ray bursts, the most energetic explosions in the universe. An international team of astronomers from Britain, Slovenia and Italy has glimpsed the infrastructure of a burst's high-speed jet. Gamma-ray bursts are the most luminous explosions in the cosmos. Most are thought to be triggered when the core of a massive star runs out of nuclear fuel, collapses...

2013-11-21 16:20:41

WASHINGTON, Nov. 21, 2013 /PRNewswire-USNewswire/ -- On April 27, a blast of light from a dying star in a distant galaxy became the focus of astronomers around the world. The explosion, known as a gamma-ray burst and designated GRB 130427A, tops the charts as one of the brightest ever seen. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) A trio of NASA satellites, working in concert with ground-based robotic telescopes, captured never-before-seen details that challenge...

Mexico Observatory To Hunt For Gamma Rays In Known Universe
2013-08-22 07:35:15

April Flowers for redOrbit.com - Your Universe Online A new observatory has begun formal operations in Mexico. The High-Altitude Water Cherenkov (HAWC) Gamma Ray Observatory is designed to study the origins of very high-energy cosmic rays and observe the most energetic objects in the known universe. The HAWC uses a unique detection technique that is different from the classical astronomical design of mirrors, lenses, and antennae, making the extraordinary observatory a significant boost...

Measuring All Light Since Big Bang May Provide Answers To Evolution Of Universe
2013-05-24 14:07:39

Lee Rannals for redOrbit.com — Your Universe Online Researchers wrote in The Astrophysical Journal that they have made the best measurement of all the light in the universe since the Big Bang yet. Measuring the number and energy of each particle of light or photon since the Big Bang could provide secrets about the nature and evolution of the Universe, such as how similar or different ancient galaxies were compared to the galaxies today. The researchers made the most accurate...

Shockingly Bright Gamma-Ray Burst Observed By Fermi, Swift
2013-05-06 04:44:26

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online On Saturday, April 27, the Fermi Gamma-ray Telescope detected a sudden, powerful flux of high-energy gamma-rays, indicating a historic burst event in a distant galaxy. The instrument then notified other telescopes located in space and on the ground that a Gamma-ray Burst (GRB) had been detected. Fermi´s main instrument the Large Area Telescope (LAT) detected gamma-rays as high as 94 giga-electron volts (GeV),...

Blowing Bubbles: The Hunt For Dark Matter Is On At SNOLAB
2013-05-03 05:07:09

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online The search for dark matter has been heating up over the last year or so. First, researchers using the Fermi Gamma-ray Telescope announced that a preliminary analysis of the soft gamma-ray data suggested evidence of dark matter annihilations coming from the galactic center. Then, early results from the Alpha Magnetic Spectrometer found an excess of positrons in their data, an expected signature of dark matter...

2013-05-02 16:20:35

WASHINGTON, May 2, 2013 /PRNewswire-USNewswire/ -- NASA astrophysicist Chryssa Kouveliotou, a senior scientist at NASA's Marshall Space Flight Center in Huntsville, Ala., has been selected for membership in the National Academy of Sciences, in recognition of her distinguished and continuing achievements in original scientific research. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) Kouveliotou, a longtime leading researcher in NASA's space science mission, conducts extensive...

Most Distant Source Of High-Energy Gamma Rays Comes From Distant Blazar
2013-04-19 04:57:41

April Flowers for redOrbit.com - Your Universe Online Of all the active galactic nuclei, blazars are the brightest and emit very high-energy gamma rays. A team led by physicists from the University of California, Santa Cruz (UCSC), has made new observations of the blazar known as PKS 1424+240 that reveal it is the most distant known source of very high-energy gamma rays. The emission spectrum of PKS 1424+240 now appears highly unusual in the light of new data. Data from the Hubble Space...

Where Do Cosmic Rays Come From?
2013-03-01 05:33:26

[ Listen to the Webcast ] John P. Millis, Ph.D. for redOrbit.com — Your Universe Online As we search the heavens, one of the striking observations is that we are constantly bombarded by a stream of extremely high energy charged particles, traveling at nearly the speed of light. Known as Cosmic Rays — composed mostly (90%) of protons with the rest mostly heavy nuclei and a small number of electrons — these particles appear to come from all directions. But where do...

Fermi Telescope Turns to Dark Matter Search
2013-01-21 10:58:25

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online For much of the last century, scientists have been searching for a mysterious substance thought to make up about 85 percent of the total mass of the Universe. Without it, galactic rotation curves, galaxy interactions and the very structure of the Universe are inconsistent with our knowledge of physics. Yet, this so-called dark matter remains elusive. One reason researchers have had such a difficult time finding and...


Latest Gamma-ray astronomy Reference Libraries

7_7ab115b117284658644e345b89f5ba712
2004-10-19 04:45:43

Gamma-Ray Astronomy -- Gamma-ray astronomy is the astronomical study of gamma rays. Long before experiments could detect gamma rays emitted by cosmic sources, scientists had known that the universe should be producing these photons. Work by Feenberg and Primakoff in 1948, Hayakawa and Hutchinson in 1952, and, especially, Morrison in 1958 had led scientists to believe that a number of different processes which were occurring in the universe would result in gamma-ray emission. These...

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