Title:	Supernova connection of unidentified ultra-high-energy gamma-ray source LHAASO J2108+5157
Authors:	De Sarkar, Agnibha
Keywords:	radiation mechanisms non-thermal –ISM individual objects LHAASO J2108 + 5157 –ISM supernova rem- nants –gamma-rays ISM
Issue Date:	6-Feb-2023
Publisher:	Oxford University Press
Citation:	Monthly Notices of the Royal Astronomical Society, 2023, Vol. 521, L5
Abstract:	We present a simple phenomenological model of hadronic interaction between protons accelerated in an old supernova remnant (SNR) and cold protons situated within the associated molecular clouds (MCs). The accelerated protons from the old SNR escaped the SNR shock front, and got injected into the MCs at an earlier time, producing ultra-high-energy gamma-rays and neutrinos through inelastic proton–proton interaction. We also take into account the acceleration and subsequent escape of electrons from the SNR shock front. The escaped electrons produce gamma-rays through various radiative cooling mechanisms, after getting injected into the MCs. We use the model discussed in this letter to explain the multiwavelength spectral energy distribution of unidentified Galactic ultra-high-energy gamma-ray source LHAASO J2108 + 5157. We also discuss the feasibility of applying this model in other cases as well. Future observations can test the viability of the model discussed in this letter, which will in turn confirm that the SNRs can, in fact, accelerate particles up to PeV energies.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/8053
ISSN:	1365-2966 (Online) 0035-8711 (Print)
Alternative Location:	https://ui.adsabs.harvard.edu/abs/2023MNRAS.521L...5D/abstract https://arxiv.org/abs/2301.13451 https://doi.org/10.1093/mnrasl/slad013 https://inspirehep.net/literature/2628542
Copyright:	2023 The Author(s)
Appears in Collections:	Research Papers (A&A)

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.