The gamma-ray emission toward HESS J1813-178 with Fermi-LAT

Discussion timeslot (ZOOM-Meeting): 16. July 2021 - 18:00
ZOOM-Meeting URL: https://icrc2021.desy.de/pf_access_abstracts
Corresponding Session: https://icrc2021-venue.desy.de/channel/Presenter-Forum-1-Evening-All-Categories/48
Abstract:
' HESS J1813-178 is one of the brightest and most compact objects detected by the HESS Galactic Plane Survey and MAGIC observations. A young supernova remnant (SNR) G12.8–0.0 locates within the TeV extent of HESS J1813-178. And a pulsar wind nebula (PWN) driven by an energetic X-ray pulsar PSR J1813-1749 is embedded in the SNR, together with a young stellar cluster, C1 1813-178, detected in this region. The origin of the gamma-ray emission from HESS J1813-178 is still not clear. Previous studies show that the GeV emission around HESS J1813-178 is much more extended than its TeV emission. With the Fermi-LAT data analysis, we did a detailed morphological and spectral analysis in the region of HESS J1813-178 and found that the GeV gamma-ray morphology above 20 GeV is much smaller, which is close to the TeV gamma-ray contours. Meanwhile, the GeV spectrum above 20 GeV is hard with an index of ~2.07, which connects smoothly with that of HESS J1813-178.'

Authors: Yuliang Xin | Xiaolei Guo
Indico-ID: 729
Proceeding URL: https://pos.sissa.it/395/625