Long-term variability in the x-ray emission of RX J0720.4-3125

被引：55

作者：

de Vries, CP

Vink, J

Méndez, M

Verbunt, F

机构：

[1] SRON, Natl Inst Space Res, NL-3584 CA Utrecht, Netherlands

[2] Univ Utrecht, Astron Inst, NL-3508 TA Utrecht, Netherlands

来源：

ASTRONOMY & ASTROPHYSICS | 2004年 / 415卷 / 02期

关键词：

neutron stars; X-rays;

D O I：

10.1051/0004-6361:20040009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We detect a gradual, long-term change in the shape of the X-ray spectrum of the isolated neutron star RX J0720.4-3125, such that the spectrum of the source can no longer be described as a blackbody spectrum. The change is accompanied by an energy-dependent change in the pulse profile. If the X-ray emission is influenced by the magnetic field of the pulsar, these changes in spectral shape may point to precession of the neutron star.

引用

页码：L31 / L34

页数：4

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