A two-temperature supernova fallback disk model for anomalous X-ray pulsars

被引：4
作者：
Lu, Y [1 ]
Cheng, KS
机构：
[1] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
[2] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
来源：
CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS | 2002年 / 2卷 / 02期
关键词：
pulsars : general; pulsars; stars : neutron; X-rays : stars; accretion disk; instability;
D O I：
10.1088/1009-9271/2/2/161
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a case study of the relevance of the radially pulsational instability of a two-temperature accretion disk around a neutron star to anomalous X-ray pulsars (AXPs). Our estimates are based on the approximation that such a neutron star disk with mass in the range of 10(-6)-10(-5) M-circle dot is formed by supernova fallback. We derive several peculiar properties of the accretion disk instability: a narrow interval of X-ray pulse periods; lower X-ray luminosities; a period derivative and an evolution time scale. All these results are in good agreement with the observations of the AXPs.
引用
收藏
页码：161 / 168
页数：8
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