The phase-resolved X-ray spectra of the Crab pulsar

被引：22
|
作者：
Zhang, L
Cheng, KS
机构：
[1] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
[2] Yunnan Univ, Dept Phys, Kunming 650091, Yunnan, Peoples R China
来源：
ASTROPHYSICAL JOURNAL | 2002年 / 569卷 / 02期
关键词：
pulsars : individual (Crab pulsar); X-rays : stars;
D O I：
10.1086/339347
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a theoretical study of phase-dependent X-ray emission from the Crab pulsar. In the three-dimensional outer gap model for the Crab pulsar, X-ray emission is produced by synchrotron radiation of the secondary e(+/-) pairs, which is sensitive to the local properties of the emission regions, i.e., local magnetic field strength and local number e(+/-) density. We calculate X-ray pulse profiles for different energy bands and phase-dependent spectral indices of X-rays. We show that such a model can reproduce approximately the basic properties of the observed phase-dependent X-ray spectra of the Crab pulsar.
引用
收藏
页码：872 / 877
页数：6
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