X-RAY PULSAR PROFILE ANALYSIS

被引：22

作者：

LEAHY, DA

机构：

[1] Department of Physics, University of Calgary, 2500 University Dr. N. W., Calgary, T2N 1N4, AB

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1990年 / 242卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1093/mnras/242.2.188

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Observed X-ray pulsar profiles are analysed by fitting to model pulse profiles. A polar-cap emission model for X-rays emitted by accreting neutron stars is constructed using the local X-ray intensity distribution for radiation from a magnetized plasma (Mészáros & Nagel). Model pulse profiles are computed from the intensity distribution from a filled or annular polar-cap emission region and fitted by least squares to observed pulse profiles of 15 X-ray pulsars. Parameters such as orientation of neutron star spin and magnetic axes and polar-cap size are derived. The mean angle between the rotation and magnetic axis is found to be ≈ 24°, much smaller than that expected for random orientations. Nine of the 15 X-ray pulsars have profiles which indicate annular shaped polar-cap emission regions. © Royal Astronomical Society. Provided by the NASA Astrophysics Data System.

引用

页码：188 / 193

页数：6

共 6 条

[1] ACCRETION BY ROTATING MAGNETIC NEUTRON STARS .3. ACCRETION TORQUES AND PERIOD CHANGES IN PULSATING X-RAY SOURCES [J].