Revealing a new region of gamma-ray emission in the vicinity of HESS J1825-137

Araya M, Mitchell AMW, Parsons RD (2019)

Publication Type: Journal article, Original article

Publication year: 2019

Journal

Monthly Notices of the Royal Astronomical Society Oxford University Press

Book Volume: 485

Pages Range: 1001-1007

Journal Issue: 1

DOI: 10.1093/mnras/stz462

Abstract

HESS J1825-137 is a bright very high-energy gamma-ray source that has been firmly established as a pulsar wind nebula (PWN), and one of the most extended gamma-ray objects within this category. The progenitor supernova remnant (SNR) for this PWN has not been firmly established. We carried out an analysis of gamma-ray observations in the region of HESS J1825-137 with the Fermi-LAT that reveals emission in the direction away from the Galactic plane. The region lies beyond the PWN and reaches a distance from the pulsar compatible with the supposed location of the SNR shock front. The spectrum of the gamma-rays is hard with a photon index of ∼1.9 in the 10-250 GeV range. Several scenarios for the origin of the emission are discussed, including the SNR as a source of high-energy particles and the 'leakage' of leptons from the PWN.

Authors with CRIS profile

Alison Mitchell

Involved external institutions

University of Zurich / Universität Zürich (UZH) CH Switzerland (CH) Universidad de Costa Rica CR Costa Rica (CR) Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics DE Germany (DE)

How to cite

APA:

Araya, M., Mitchell, A.M.W., & Parsons, R.D. (2019). Revealing a new region of gamma-ray emission in the vicinity of HESS J1825-137. Monthly Notices of the Royal Astronomical Society, 485(1), 1001-1007. https://doi.org/10.1093/mnras/stz462

MLA:

Araya, M., Alison M. W. Mitchell, and R. D. Parsons. "Revealing a new region of gamma-ray emission in the vicinity of HESS J1825-137." Monthly Notices of the Royal Astronomical Society 485.1 (2019): 1001-1007.

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