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Latest Gamma-ray burst Stories

Astronomers Locate New Type Of Stellar Blast - The Kilonova
2013-08-04 05:03:18

redOrbit Staff & Wire Reports - Your Universe Online Researchers using the Hubble Space Telescope have discovered new evidence that the merger of two small, super-dense stellar objects is responsible for producing short-duration gamma ray bursts, according to research published Saturday in a special online edition of the journal Nature. Thanks to observations provided using NASA's low-orbit aperture telescope, the study authors were able to locate a new type of stellar blast known...

2013-08-03 16:20:05

WASHINGTON, Aug. 3, 2013 /PRNewswire/ -- NASA's Hubble Space Telescope recently provided the strongest evidence yet that short-duration gamma ray bursts are produced by the merger of two small, super-dense stellar objects. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO ) The evidence is in the detection of a new kind of stellar blast called a kilonova, which results from the energy released when a pair of compact objects crash together. Hubble observed the fading...

The Largest Magnetic Fields In The Universe
2013-07-29 04:11:34

John P. Millis, Ph.D. for redOrbit.com - Your Universe Online Gamma-ray bursts (GRBs) are thought to be the most powerful, energetic events in the Universe. They can release as much energy in one second as an entire galaxy expels in an entire year. But while astronomers have some solid theories on what drives these events, many of the details are still widely debated. One of the complicating matters comes from the fact GRBs appear to fall into two separate classes: long and short burst...

Gold Created By Colliding Stars
2013-07-18 04:18:47

[ Watch the Video: Merging Neutron Stars ] redOrbit Staff & Wire Reports - Your Universe Online A gamma-ray burst (GRB) created by the collision of two neutron stars has given researchers new insight into how gold, one of the rarest elements on Earth, and in the entire universe, is formed. Lead author Edo Berger of the Harvard-Smithsonian Center for Astrophysics (CfA) and his colleagues explain that unlike elements such as carbon or iron, gold cannot be created inside of a star....

Liverpool Telescope Successor In The Works
2013-07-02 04:32:37

Lee Rannals for redOrbit.com - Your Universe Online The scientific community is designing a successor to the 2-meter Liverpool Telescope (LT) located on La Palma. The Astrophysics Research Institute of Liverpool John Moores University (LJMU), which owns and operates LT, is developing plans for the new telescope. So far, they've said Liverpool Telescope 2 (LT2) will be a 4-meter class facility. "We've been having productive talks with the Instituto de Astrofisica de Canarias and hope...

NuSTAR Observatory Busy High Energy Events
2013-06-18 11:08:53

Brett Smith for redOrbit.com - Your Universe Online NASA´s NuSTAR orbiting observatory is designed to investigate high-energy events throughout the universe, and the cosmos has been keeping it busy in recent months, producing one event after another. In early April, the galaxy Markarian 421 produced a high-energy event that increased its brightness by more than 50 times its usual level. Markarian 421 is known as a blazer, a unique class of galaxies with supermassive "feeding" black...

2013-05-29 12:21:17

WASHINGTON, May 29, 2013 /PRNewswire-USNewswire/ -- Astronomers using NASA's Swift X-ray Telescope have observed a spinning neutron star suddenly slowing down, yielding clues they can use to understand these extremely dense objects. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) A neutron star is the crushed core of a massive star that ran out of fuel, collapsed under its own weight, and exploded as a supernova. A neutron star can spin as fast as 43,000 times per minute and...

Black Hole Birth In A Cosmic Flash
2013-05-05 06:07:14

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online Stars sustain themselves by fusing elements in their core, producing even heavier atoms, releasing energy that keeps the immense force of gravity at bay. But eventually, the fusion process will no longer produce enough outward radiation pressure to sustain the star, and it will begin to collapse in on itself. In the grandest of cases, the progenitor is a truly massive object, perhaps tens or hundreds of times the mass...

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...

Dark Lightning And Visible Lightning May Be Connected
2013-04-25 11:02:17

Watch the video "Scientists Detect Dark Lightning Linked To Visible Lightning" Brett Smith for redOrbit.com - Your Universe Online Discovered in 1991, dark lightning is an electrical phenomenon that occurs deep within a thunderhead and is responsible for producing a powerful burst of radio waves and gamma rays. Now, new research from an international team of scientists has found that dark lightning and visible lightning may be connected, according to a report in Geophysical...


Latest Gamma-ray burst 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...

6_f3739d4b04b11a1c267bfcc286610ef92
2004-10-19 04:45:41

Hypernova -- A hypernova is a theoretical type of supernova produced when exceptionally large stars collapse at the end of their lifespan. In a hypernova, the core of the star collapses directly into a black hole and two extremely energetic jets of plasma are emitted from its rotational poles at nearly light speed. These jets emit intense gamma rays, and are a candidate explanation for gamma ray bursts. Theorists have come up with several plausible explanations for hypernovae. It may...

6_f5324ad7d5514381282c99963af8be7c2
2004-10-19 04:45:41

Gamma-Ray Burst -- In astronomy, Gamma-ray bursters (GRBs) are flashes of gamma rays that last from seconds to hours, the longer ones being followed by several days of X-ray afterglow. They occur at random positions in the sky several times each day. They are now believed to result from tremendous explosions in far away galaxies, during the creation of a black hole from a dying star or two colliding neutron stars. The black hole, surrounded by a rotating disk of matter falling into it,...

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