HESS J1809–193 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 J1809–193 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 J1809–193 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.
Volume 417 -
7th Heidelberg International Symposium on High-Energy Gamma-Ray Astronomy (Gamma2022) -
Contributed talks
Revisiting HESS J1809–193 — a very-high-energy gamma-ray source in a fascinating environment
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Pre-published on:
April 19, 2023
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Abstract
DOI: https://doi.org/10.22323/1.417.0030
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.