New Source Of Very High Energy Gamma Rays Detected Around A Supernova Remnant

Posted: Dec 30 2018, 7:05am CST | by , Updated: Dec 30 2018, 7:08am CST, in Latest Science News


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New Source of Very High Energy Gamma Rays Detected Around a Supernova Remnant
MAGIC J1835–069 is marked with a blue line. Credit: Acciari et al., 2018.

The newly found source of very high energy gamma-ray emission , designated MAGIC J1835–069, resides some 16,300 light years from Earth.

In a region around the supernova remnant (SNR) G24.7+0.6, astronomers have discovered a new source of very high energy gamma-ray emission. The newly found source, designated MAGIC J1835–069, is located around 16,300 light years from Earth and could be helpful in improving our understanding about the nature of gamma rays in general.

Universe is filled with all sorts of collisions and explosions. Most powerful explosions in the universe are known as gamma rays and they may come from pulsars, quasars, supernova remnants and other extreme cosmic objects and events. Since these explosions spew light and particles in all directions, they are often picked up by ground and space based telescopes.

The detection of the new source of gamma rays was made possible using MAGIC (Major Atmospheric Gamma Imaging Cherenkov Telescopes) and NASA's Fermi Gamma-ray Space Telescope. The very high energy gamma-ray emission originated from a region around the supernova remnant SNR G24.7+0.6 - a 9,500 year-old radio and gamma-ray SNR.

Usually, researchers distinguish three types of supernova remnants or SNRs, one of which is the composite SNR. Composite SNRs are known to accelerate particles to very high energies (VHE), up to hundreds of TeV or beyond. Therefore, such objects are excellent targets for finding new sources of VHE emission.

Using MAGIC telescopes and NASA's Fermi, researchers identified a VHE emission from an extended source located 0.34 degrees away from the center of G24.7+0.6. The emission from the new source was found at energies above 150 GeV and has been detected up to 5 TeV. The new source MAGIC J1835–069 lies between two known extended sources called FGES J1836.5–0652 and the FGES J1834.1– 0706.

“In this paper, we study the interesting region centered around SNR G24.7+0.6 with Fermi-LAT in the energy range between 60 MeV and 500 GeV. We also explore with the MAGIC telescopes the region around it to investigate the spectral behavior above 150 GeV in order to constrain the emission region observed by Fermi-LAT around the SNR," researchers wrote in the paper. "The detected gamma-ray emission can be interpreted as the results of proton-proton interaction between the supernova and the CO-rich surrounding."

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<a href="/latest_stories/all/all/47" rel="author">Hira Bashir</a>
The latest discoveries in science are the passion of Hira Bashir (). With years of experience, she is able to spot the most interesting new achievements of scientists around the world and cover them in easy to understand reporting.




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