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arXiv 0708.1792astro-ph
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X射线脉冲双星的辐射柱和光变曲线

Radiative Column and Light Curve of X-Ray Binary Pulsars

S. Karino

摘要:

我们研究了117个已发表的X射线双星的光变曲线(LC),着重于它们的光变曲线对观测能带的依赖性。结果表明,只有当X射线光度大于~ 5 × 10^36 erg/s时,液晶的能量依赖性才出现。假设光变曲线的行为与中子星表面的辐射吸积柱有关,这个能量阈值可以认为是Basko和Sunyaev提出的吸积柱形成的观测证明。一旦我们掌握了辐射柱的存在,我们也可以获得一些关于中子星性质的有用信息。作为一个例子,我们进行了磁轴的取向角的统计分析,我们发现,磁轴的倾角应该是小的,以解释所观察到的统计。

英文摘要:

We examine the published light curves (LCs) of 117 X-ray binary pulsars, focusing on the dependence of their light curves on the observed energy bands. It is found that the energy dependence of the LCs appears only when the X-ray luminosity is larger than ~ 5 x 10^36 erg/s. Assuming that the behavior of light curve is related to the radiative accretion column on the neutron star surface, this energy threshold can be considered as the observational proof of the accretion column formation proposed by Basko and Sunyaev. Once we can grasp the existence of radiative column, we can also obtain several useful informations on the neutron star properties. As an instance, we perform the statistical analysis of the orientation angle of the magnetic axis, and we find that the inclination angle of magnetic axis should be small in order to explain the observed statistics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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