HESS J1852.000: A Very High Energy Gamma-ray source near the Supernova Remnant Kes 78

摘要

Many new sources of very-high-energy (VHE) gamma rays have been discovered thanks to deeper observations in the on-going H.E.S.S. Galactic Plane Survey. Of these new sources, some can be at least tentatively associated with remnants of supernova explosions, which are well-known sites of high-energy particle acceleration. Here, we present a new unidentified gamma-ray source that may be partially associated with either with an interaction of the elongated shell-type SNR Kes 78 with a nearby molecular cloud, or with a previously undiscovered pulsar-wind nebula. Several emission scenarios are discussed along with a multi-wavelength search for counterparts.