Explaining the extended GeV gamma-ray emission adjacent to HESS J1825-137

Collins T, Rowell G, Mitchell AMW, Voisin F, Fukui Y, Sano H, Alsulami R, Einecke S (2021)

Publication Type: Journal article, Original article

Publication year: 2021

Journal

Monthly Notices of the Royal Astronomical Society Oxford University Press

Book Volume: 504

Pages Range: 1840-1853

Journal Issue: 2

DOI: 10.1093/mnras/stab983

Abstract

HESS J1825-137 is one of the most powerful and luminous TeV gamma-ray pulsar wind nebulae (PWN). To the south of HESS J1825-137, Fermi-LAT observation revealed a new region of GeV gamma-ray emission with three apparent peaks (termed here, GeV-ABC). This study presents interstellar medium (ISM) data and spectral energy distribution (SED) modelling towards the GeV emission to understand the underlying particle acceleration. We considered several particle accelerator scenarios - the PWN associated with HESS J1825-137, the progenitor SNR also associated with HESS J1825-137, plus the gamma-ray binary system LS 5039. It was found that the progenitor SNR of HESS J1825-137 has insufficient energetics to account for all GeV emission. GeV-ABC may be a reflection of an earlier epoch in the history of the PWN associated with HESS 1825-137, assuming fast diffusion perhaps including advection. LS 5039 cannot meet the required energetics to be the source of particle acceleration. A combination of HESS J1825-137 and LS 5039 could be plausible sources.

Authors with CRIS profile

Alison Mitchell

Involved external institutions

Nagoya University / 名古屋大学 JP Japan (JP) University of Adelaide AU Australia (AU) Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich CH Switzerland (CH)

How to cite

APA:

Collins, T., Rowell, G., Mitchell, A.M.W., Voisin, F., Fukui, Y., Sano, H.,... Einecke, S. (2021). Explaining the extended GeV gamma-ray emission adjacent to HESS J1825-137. Monthly Notices of the Royal Astronomical Society, 504(2), 1840-1853. https://doi.org/10.1093/mnras/stab983

MLA:

Collins, Tiffany, et al. "Explaining the extended GeV gamma-ray emission adjacent to HESS J1825-137." Monthly Notices of the Royal Astronomical Society 504.2 (2021): 1840-1853.

BibTeX: Download