Glitches; the Link Between the Typical Radio Pulsars and the Anomalous X- ray Pulsars Jinrong Lin & Shuangnan Zhang, 2003, in preparation Physics department & Center for Astrophysics in Tsinghua University

Contents Brief introduction to the timing feature of AXP Introduction to pulsar glitches and the post-glitch recovery Explanations for the age problem of PSR B The fate of PSR B (a future candidate of Anomalous X-ray Pulsar). Conclusions and discussion

What is AXP (Anomalous X-ray Pulsar) Mereghetti et al., 2002

glitches

Theoretical models for pulsar glitches; star quake and vortex creep

Post-glitch recovery for Vela and Crab

Detected glitch parameters for Crab

Average ratio of permanent changes to slowdown rate For Vela For Crab

propeller

Spin-down rate in the accretion model

Fate of pulsars in accretion model (P. Chatterjee et al. 2000)

Chandra detection is consistent with standard magnetospheric emission (Kaspi et al. 2001)

Estimation of the age of PSR B or similar pulsars

Glitch pulsars and their associated SNRs

“young” pulsars and their missing SNRs

Spin-down rate in the accretion model

Timing feature of AXPs

Fate of PSR B when it is yrs old;

Glitches in AXP?

Conclusions and discussion New model bases on observation; glitches We should carefully estimate the pulsars’ ages the fate of a pulsar depends on its post-glitch recovery type. The population of AXPs given by our model is reasonable.