Speaker
Dr
Hao Zhou
(Los Alamos National Laboratory)
Description
Nearby electron and positron accelerators, especially Pulsar Wind Nebulae, have been proposed as potential origins of the local multi-GeV positron excess. The HAWC Gamma-Ray Observatory has reported very extended TeV gamma-ray emission around two nearby middle-aged pulsars Geminga and B0656+14, suggesting ultra-relativistic electrons and positrons accelerated in our backyard. The gamma-ray profiles up to tens of parsecs around these two pulsars provide a direct constraint on the diffusion of electrons and positrons in the interstellar medium. We will present the spatial and spectral studies on these two TeV gamma-ray sources and the derived positron contribution at Earth.
Primary author
Dr
Hao Zhou
(Los Alamos National Laboratory)
