The chandra LETGS high resolution X-ray spectrum of the isolated neutron star RX J1856.5-3754

被引：86

作者：

Burwitz, V

Zavlin, VE

Neuhäuser, R

Predehl, P

Trümper, J

Brinkman, AC

机构：

[1] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany

[2] SRON, NL-3584 CA Utrecht, Netherlands

来源：

ASTRONOMY & ASTROPHYSICS | 2001年 / 379卷 / 02期

关键词：

stars : atmospheres; stars : individual : RX J1856.5-3754; stars : neutron; X-rays : stars;

D O I：

10.1051/0004-6361:20011304

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the Chandra LETGS X-ray spectrum of the nearby (similar or equal to 60 pc) neutron star RXJ1856.5-3754. Detailed spectral analysis of the combined X-ray and optical data rules out the nonmagnetic neutron star atmosphere models with hydrogen, helium, iron and solar compositions. We also conclude that strongly magnetized atmosphere models are unable to represent the data. The data can be explained with a two-component blackbody model. The harder component with temperature of kT(bb)(infinity) similar or equal to 63 eV and a radius R-bb(infinity) similar or equal to2.2 km of the emitting region well fits the X-ray data and can be interpreted as radiation from a hot region on the star's surface.

引用

页码：L35 / L38

页数：4

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