Revisiting HESS J1809193 — a very-high-energy gamma-ray source in a fascinating 
environment

H.E.S.S. Collaboration; Mohrmann, L.; Joshi, V.; Hinton, J.; Funk, S.

doi:10.22323/1.417.0030

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Revisiting HESS J1809193 — a very-high-energy gamma-ray source in a fascinating environment

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Mohrmann, L.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Hinton, J.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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H.E.S.S. Collaboration, Mohrmann, L., Joshi, V., Hinton, J., & Funk, S. (in press). Revisiting HESS J1809193 — a very-high-energy gamma-ray source in a fascinating environment. Proceedings of Science, 417: 30.

Cite as: https://hdl.handle.net/21.11116/0000-0010-09F0-5

Abstract

HESS J1809193 is one of the unidentified very-high-energy gamma-ray sources in the H.E.S.S. Galactic Plane Survey (HGPS). It is located in a rich environment, with an energetic pulsar and associated X-ray pulsar wind nebula, several supernova remnants, and molecular clouds in the vicinity. Furthermore, HESS J1809193 was recently detected at energies above 56 TeV with HAWC, which makes it a PeVatron candidate, that is, a source capable of accelerating cosmic rays up to PeV energies. We present a new analysis of the TeV gamma-ray emission of HESS J1809193 with H.E.S.S., based on improved analysis techniques. We find that the emission is best described by two components with distinct morphologies and energy spectra. We complement this study with an analysis of Fermi-LAT data in the same region. Finally, taking into account further multi- wavelength data, we interpret our results both in a hadronic and leptonic framework.