Diffuse continuum emission and large extended sources at MeV energies
High Energy Astrophysical Phenomena
2025-10-09 v1
Abstract
Future gamma-ray survey instruments, such as newASTROGAM and AMEGO-X, will significantly improve previous and current all-sky surveys at MeV energies. In this paper we discuss the continuum emission from the Milky Way, two prominent large extended sources, the Fermi bubbles and Loop I, and the extragalactic gamma-ray background. We highlight the importance of measurements in the MeV to GeV energy range for understanding CR production and propagation in the Galaxy, for the determination of the nature of the Fermi bubbles and Loop I, and for exploring the origin of the extragalactic gamma-ray background.
Cite
@article{arxiv.2510.07311,
title = {Diffuse continuum emission and large extended sources at MeV energies},
author = {Markus Ackermann and Denys Malyshev and Dmitry V. Malyshev},
journal= {arXiv preprint arXiv:2510.07311},
year = {2025}
}
Comments
27 pages, 5 figures, part of the "Unveiling the MeV Universe in the Multi-Messenger Era" collection in Space Science Reviews