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June 13, 2012

NASA detects powerful gamma rays solar 06/12/2012



During a solar storm of March 7, the gamma-ray Telescope NASA's Fermi detected a light never before associated with a burst of X-ray solar flare.It was historically the largest gamma ray recorded by the Sun, with over 100 million electrovolts (MeV), the report published yesterday Fermi.

The peak of the flare was 2 billion times the energy of visible light, or about 4 billion electron volts (GeV), a record never detected during or after a solar flare. (See videos and image gallery).Was a gamma ray flux equivalent to more than 100 million electron volts (100 MeV), equivalent to 1000 times the release of gamma rays of the sun normal basalAnother notable features is that this high energy was recorded for 20 hours, which means a period of more than two and a half times as recorded historically.

The X-ray explosion March 7 was a magnitude X5.4, on a scale from A, B, C, M, where X is the strongest.So far, in four years of investigations, as the star physicist at the University of California, Nicola Omodei, the Sun had only weak and stable gamma ray sources.

"Now we can see what the Sun is able to do," Omodei described the meeting 220ava American Astronomical Society in Anchorage, Alaska.Fermi's team reviews the sky every 3 hours searching for gamma-ray energy range 20 MeV to about 300 MeV.With a second instrument, the Gamma-Ray Monitor (GBM), detects weaker energy of 8,000 eV to 40 MeV, which are energy ranges that detect interesting phenomena observed in the sky space, reports NASA.

With both teams on June 12, 2010, a sharp Fermi gamma ray, but much less than that observed on March 7, 2012.ImageryThe Fermi image shows the powerful gamma-ray flare detected on March 7, which indicates that measurement is greater than 100 million electron volts and (MeV), a thousand times its usual release. On the other side shows the ray source Vela star press.The sun produces gamma rays after a release of protons.

Particles accelerated protons collide with each other generating a pion particle emitting gamma rays. (See gallery)The first video shows how to form a gamma ray burst. The second is for the Solar Dynamic Observatory images (SDO), SLAR storm on March 7.

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