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 &...
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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
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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
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What is AXP (Anomalous X-ray Pulsar) Mereghetti et al., 2002
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glitches
23
69
10 to10
10 to10
P
P
P
P
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Theoretical models for pulsar glitches; star quake and vortex creep
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Post-glitch recovery for Vela and Crab
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Detected glitch parameters for Crab
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Average ratio of permanent changes to slowdown rate
For Vela 0.00092
For Crab 0.00009
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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
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Spin-down rate in the accretion model
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Fate of pulsars in accretion model (P. Chatterjee et al. 2000)
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Chandra detection is consistent with standard magnetospheric emission (Kaspi et al. 2001)
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Estimation of the age of PSR B1757-24 or similar pulsars
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Glitch pulsars and their associated SNRs
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“young” pulsars and their missing SNRs
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Spin-down rate in the accretion model
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Timing feature of AXPs
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Fate of PSR B1757-24when it is 290000 yrs old;
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Glitches in AXP?
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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.