1. 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

2. 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 B1757-24 The fate of PSR B1757-24 (a future candidate of Anomalous X-ray Pulsar). Conclusions and discussion

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

6. glitches

7. Theoretical models for pulsar glitches; star quake and vortex creep

8. Post-glitch recovery for Vela and Crab

9. Detected glitch parameters for Crab

10. Average ratio of permanent changes to slowdown rate For Vela 0.00092 For Crab 0.00009

12. propeller

13. Spin-down rate in the accretion model

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

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

17. Estimation of the age of PSR B1757-24 or similar pulsars

18. Glitch pulsars and their associated SNRs

19. “young” pulsars and their missing SNRs

20. Spin-down rate in the accretion model

21. Timing feature of AXPs

22. Fate of PSR B1757-24 when it is 290000 yrs old;

24. Glitches in AXP?

25. 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.