期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 485, 期 1, 页码 1001-1007出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stz462
关键词
ISM individual objects: HESS J1825; 137A; ISM: supernova remnants; gamma rays: ISM
资金
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [690575]
- Universidad de Costa Rica
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 similar to 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.
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