The paper supplies an introductory lecture-style summary of observational techniques, astronomical sources, and physical processes across the four main messengers in multi-messenger astronomy.
Attenuation of VHE gamma rays by the Milky Way interstellar radiation field
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abstract
The attenuation of very high energy gamma rays by pair production on the Galactic interstellar radiation field has long been thought of as negligible. However, a new calculation of the interstellar radiation field consistent with multi-wavelength observations by DIRBE and FIRAS indicates that the energy density of the Galactic interstellar radiation field is higher, particularly in the Galactic center, than previously thought. We have made a calculation of the attenuation of very high energy gamma rays in the Galaxy using this new interstellar radiation field which takes into account its nonuniform spatial and angular distributions. We find that the maximum attenuation occurs around 100 TeV at the level of about 25% for sources located at the Galactic center, and is important for both Galactic and extragalactic sources.
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astro-ph.HE 1years
2019 1verdicts
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Introduction to multi-messenger astronomy
The paper supplies an introductory lecture-style summary of observational techniques, astronomical sources, and physical processes across the four main messengers in multi-messenger astronomy.