Discovery of VHE gamma-rays from the vicinity of the shell-type SNR G318.2+0.1 with H.E.S.S

TL;DR

This paper reports the discovery of extended very-high-energy gamma-ray emission near the shell-type supernova remnant G318.2+0.1 using H.E.S.S., suggesting possible interactions with molecular clouds, and discusses its properties with multi-wavelength data.

Contribution

First detection of VHE gamma-ray emission from the vicinity of SNR G318.2+0.1 with detailed morphological analysis and multi-wavelength context.

Findings

Discovery of VHE gamma-ray source HESSJ1457-593 near SNR G318.2+0.1

Extended gamma-ray emission correlates with molecular cloud regions

Morphological analysis supports potential SNR/molecular cloud interaction

Abstract

The on-going H.E.S.S. Galactic Plane Survey continues to reveal new sources of VHE gamma-rays. In particular, recent re-observations of the region around the shell-type supernova remnant (SNR) G318.2+0.1 have resulted in the discovery of statistically-significant very-high-energy (VHE) gamma-ray emission from an extended region. Although the source remains unidentified, archival observations of CO12 in the region provide an opportunity to investigate a potential SNR/molecular cloud interaction. The morphological properties of this newly-discovered VHE gamma-ray source HESSJ1457-593 are presented and discussed in light of the multi-wavelength data available.