天文系A类岗位考核聘任汇报.ppt

文档介绍：Qiao,. Dept. of Astronomy, Peking Univ.Collaborators:Zhang, B.(University of Nevada), Xu, .(PKU), Han,.(NAOC), Lin,.(SHO),Lee,.(PKU)Xia,.
Radio and Gamma-ray emission of pulsars
Radio and Gamma-ray emission of pulsars
I. Radio emission (pton scattering model: ICS )II. Inner annular gap & gamma-ray emission Radio + Gamma ray emissionIII. Pulsar: Neuron stars or Strange stars?
Core beam
Beam-frequency
Mode changing
Bi-drifting
Gamma-ray
Core gap
Annular gap
Strange stars
Pulsar emission beams
Observations
Emission beams
Rankin, 1983, ApJ,274,333
Theories
Ruderman & Sutherland (RS) Model
Ruderman & Shutherland,1975, ApJ,196,51
Emission beams in RS model
Ruderman & Sutherland, 1975
Emission beams
Hollow cone only!
Obs. & Theory(ICS)
(1) Core + Cones
(2) e
from different locations
(3) Pulse profile shapes
changing with freq.
(4) Mode changing
(5) Bi-drifting
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Pulsars: NS or Strange stars?