Detection of Gamma-Ray Emission from the Starburst Galaxies M82 and NGC 253 with the Large Area Telescope on Fermi
Fermi LAT Collaboration: A.A. Abdo, et al
TL;DR
This paper reports the first detection of gamma-ray emission from the starburst galaxies M82 and NGC 253 using Fermi LAT data, linking cosmic ray interactions to star formation activity.
Contribution
It provides the first evidence of gamma-ray emission from these galaxies, establishing a connection between starburst activity and high-energy gamma-ray production.
Findings
Detected gamma-ray emission from M82 and NGC 253 with high significance.
Gamma-ray fluxes are consistent with cosmic ray interactions in star-forming regions.
Supports the hypothesis that star formation correlates with gamma-ray emission.
Abstract
We report the detection of high-energy gamma-ray emission from two starburst galaxies using data obtained with the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. Steady point-like emission above 200 MeV has been detected at significance levels of 6.8 sigma and 4.8 sigma respectively, from sources positionally coincident with locations of the starburst galaxies M82 and NGC 253. The total fluxes of the sources are consistent with gamma-ray emission originating from the interaction of cosmic rays with local interstellar gas and radiation fields and constitute evidence for a link between massive star formation and gamma-ray emission in star-forming galaxies.
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