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arXiv 0906.4928astro-ph.HE
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吸积中子星周围盘的翘曲模

Warping modes in discs around accreting neutron stars

H. Meheut, M. Tagger

摘要:

研究了吸积中中子星磁层中等离子体薄片的起源和稳定性。首先,这种磁层盘的径向延伸进行了探讨。在此基础上,重新考虑了Agapitou,Papaloizou和Terquem(1997)提出的弯曲波理论,提出了磁层吸积的一种机制。我们表明,这种翘曲变得不稳定,可以达到高振幅,在一个变形的Pringle的辐射驱动模型的AGN吸积盘的翘曲(Pringle(1996))。最后讨论了这一机制如何为解释观测到的中子星双星X射线kHz QPO提供线索。

英文摘要:

The origin and stability of a thin sheet of plasma in the magnetosphere of an accreting neutron star is investigated. First the radial extension of such a magnetospheric disc is explored. Then a mechanism for magnetospheric accretion is proposed, reconsidering the bending wave explored by Agapitou, Papaloizou & Terquem (1997), that was found to be stable in ideal MHD. We show that this warping becomes unstable and can reach high amplitudes, in a variant of Pringle's radiation-driven model for the warping of AGN accretion discs (Pringle (1996)). Finally we discuss how this mechanism might give a clue to explain the observed X-ray kHz QPO of neutron star binaries.

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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