Glitches; the Link Between the Typical Radio Pulsars and the Anomalous X- ray Pulsars Jinrong Lin &...
Transcript of Glitches; the Link Between the Typical Radio Pulsars and the Anomalous X- ray Pulsars Jinrong Lin &...
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 B1757-24 The fate of PSR B1757-24 (a future candidate of
Anomalous X-ray Pulsar). Conclusions and discussion
What is AXP (Anomalous X-ray Pulsar) Mereghetti et al., 2002
glitches
23
69
10 to10
10 to10
P
P
P
P
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 0.00092
For Crab 0.00009
propeller
eq
eq mBPP
mB
P
7/315
7/612
Mc
7/215
7/412
8M
3/28c
7.4
RR when happenspropeller
106.4R
:radius ericmagnetosph
cm107.1R
:radius corotationKeplerian
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 B1757-24 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 B1757-24when it is 290000 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.