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Starburst Galaxies: Explainably Juicy

3 Apr 2020, 11:30 UTC
Starburst Galaxies: Explainably Juicy
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Title: The γ-ray Emission of Star-Forming GalaxiesAuthors: Marco Ajello, Mattia Di Mauro, Vaidehi S. Paliya, and Simone GarrappaFirst Author’s Institution: Department of Physics and Astronomy, Clemson University, Kinard Lab of Physics, Clemson, SCStatus: Submitted to ApJ
Galaxies at gamma raysTo truly understand the intricacies of our Universe, we must look at it in different ways, or more specifically, in different wavelengths. Most astrophysical objects are brighter at some wavelengths and dimmer in others. Looking in optical we can see galaxies and their beautiful structures. X-rays tell us about the hot gas in environment, and radio observations can teach us about relativistic jets (for more on this, check out this nifty guide).At the highest energies (tiny wavelength, huge frequency), we call photons gamma rays. These gamma rays can reveal the secrets about different forms of particle acceleration that occur within cosmic accelerators. While some gamma rays may be produced from scattering off of high-energy electrons or emitted from electrons gyrating around magnetic field lines, they are also thought to be generated in interactions between ultra-relativistic atomic nuclei, otherwise known as ultra-high-energy cosmic rays. Detecting gamma rays from cosmic-ray interactions, so called “hadronic gamma rays,” could help unravel numerous ongoing mysteries in ...

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