Observations of extended very-high-energy halos around Geminga and Monogem with the LHAASO-KM2A

Discussion timeslot (ZOOM-Meeting): 20. July 2021 - 18:00
ZOOM-Meeting URL: https://desy.zoom.us/j/98542982538
ZOOM-Meeting ID: 98542982538
ZOOM-Meeting Passcode: ICRC2021
Corresponding Session: https://icrc2021-venue.desy.de/channel/53-PWN-and-Halos-GAD-GAI/84
Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Discussion-04/5

Abstract:
'Gamma-ray halos around pulsars at very-high energies are an effective probe of particle propagation in the interstellar medium. Using the data collected by the half-array of the Large High Altitude Air Shower Observatory (LHAASO), we study the morphologies and spectra of the larger 25 TeV gamma-ray emission around Geminga and Monogem. The significance of Geminga (Monogem) above 25 TeV is ~10sigma (~7sigma) assuming a point source template with one-year’s exposure of the half array. Energy-dependent morphologies are investigated, which are very useful in constraining the energy-dependence of the diffusion coefficient. The energy spectra of Geminga and Monogem are also analyzed.'

Authors: yingying Guo
Co-Authors: yi zhang | qiang yuan | hongbo hu
Collaboration: Lhaaso

Indico-ID: 964
Proceeding URL: https://pos.sissa.it/395/852