PeV Emission of the Crab Nebula: Constraints on the Proton Content in Pulsar Wind and Implications
PeV Emission of the Crab Nebula: Constraints on the Proton Content in Pulsar Wind and Implications
Abstract Recently, two photons from the Crab Nebula with energy of approximately 1 PeV were detected by the Large High Altitude Air Shower Observatory (LHAASO), opening an ultrahigh-energy window for studying pulsar wind nebulae (PWNe). Remarkably, the LHAASO spectrum at the highest-energy end shows a possible hardening, which could indicate …