多加速区gamma射线脉冲星辐射模型.ppt

Pulsar’s Multi-Accelerator Radiation model 李柯伽 导师：乔国俊 Peking University Outline The difficulties of present pulsar models The apocalypse from observation theoretical research A new acceleration region and a new model Properties of this model Comparing to observations Pulsars Difficulties of present model There are two kinds of models For Polar Gap Model (Muslimov Harding 2003) Require small inclination angle and impact angle For Outer Gap Model(Cheng et al 1986, 1994, 2000...) No off-pulse emission No Tev cut-off Too sharp rise of pulse profile Observation Spectra The apocalypse from observation Pulse profile show: The radio radiation comes from a compact region while gamma-ray radiation comes from a wide region Spectra show Tev cut-off require the radiation location not far from the pulsar The theory of pulsar radiation Polar Gap Model Radiation locates at the magnetic pole of the pulsar Outer Gap Model Radiation locates outside the null surface,far from the pulsar Reasons for Difficulties of Present Model New Radiation Location We note the so called “Mid-Gap” It locates near than Outer Gap Farther than Polar Gap Input Physics The radiation direction The intensity of radiation NOTE: only at this time! We will calculate the physics very soon. Determine the Radiation Geometry Abbreviation Correction The abbreviation will affect the direction of radiation. The Calculation for the Radiation Map Relative intensity Radio? We also consider the radio radiation in this region Take the Inverse Compton Scatter model to calculate the radio radiation Have the intrinsic Beauty of Unification! Not a machine made model ICS model sketch map Calculation for Radio Radiation Unified Results The result of our model Vision Multi-bands Fitting of Observations Predictions  Gamma-B Process Gamma-B process Geometry Condition The Escape Membrane of the Photons Spectra Result Our Work Further Work Dynamic Kinetic Thanks * * W m + - - + Null surface Strong magnetic fie