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Journal Article

Gamma-ray astrophysics in the MeV range


Kanbach,  Gottfried
High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;

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Angelis, A. D., Tatischeff, V., Argan, A., Brandt, S., Bulgarelli, A., Bykov, A., et al. (2021). Gamma-ray astrophysics in the MeV range. Experimental Astronomy, (2021). doi:10.1007/s10686-021-09706-y.

Cite as: https://hdl.handle.net/21.11116/0000-0009-2EEF-8
The energy range between about 100 keV and 1 GeV is of interest for a vast class of astrophysical topics. In particular, (1) it is the missing ingredient for understanding extreme processes in the multi-messenger era; (2) it allows localizing cosmic-ray interactions with background material and radiation in the Universe, and spotting the reprocessing of these particles; (3) last but not least, gamma-ray emission lines trace the formation of elements in the Galaxy and beyond. In addition, studying the still largely unexplored MeV domain of astronomy would provide for a rich observatory science, including the study of compact objects, solar- and Earth-science, as well as fundamental physics. The technological development of silicon microstrip detectors makes it possible now to detect MeV photons in space with high efficiency and low background. During the last decade, a concept of detector (“ASTROGAM”) has been proposed to fulfil these goals, based on a silicon hodoscope, a 3D position-sensitive calorimeter, and an anticoincidence detector. In this paper we stress the importance of a medium size (M-class) space mission, dubbed “ASTROMEV”, to fulfil these objectives.