Prof. Guo-Jin Qiao (Peking Univ.) visit our group and give colloquium speech

Jan 28, 2011

enough to produce gamma-rays.

“The Annular Gap Model and Pulsar High Energy and Radio Emission”

An annular gap model of pulsars will be presented. In this model, the advantages of both the polar cap/slot gap model and outer gap model are retained. The annular gap region would play an important role for both young normal pulsars and millisecond pulsars, since the potential drops in the annular region can be high.

 This is consistent with pulsar observations by the Fermi satellite. The annular gap could be formed regardless of whether pulsars are neutron stars or quark stars. Besides the annular gap, a core gap would also form. Particles accelerated from the two gaps can explain both radio and gamma-ray emission of pulsars. The radio emission is powered by Inverse Compton scattering (ICS) in strong magnetic fields. Recent results of the annular gap model will be presented both theoretically and observationally.