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arXiv 1408.2397astro-ph.HE
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长周期孤立X射线源的形成

A scenario of the formation of isolated X-ray pulsars with anomalously long period

N. R. Ikhsanov, V. Yu. Kim, N. G. Beskrovnaya

摘要:

孤立的X射线辐射源的形成的情况进行了讨论与应用程序的最好的研究对象之一,这类1 E 161348-5055。这颗中等亮度的脉冲星,亮度为10^33 - 10^35 erg/s,光谱相对较软,kT约为0.6-0.8 keV,与一颗孤立的中子星有关,中子星位于年轻(约2000年)致密超新星遗迹RCW 103的中心附近,并稳定旋转(|dν/dt| < 2.6 x 10^-18 Hz/s),周期为6.7 hr.我们表明,在当前的历元中,中子星处于吸积体状态.源辐射的参数可以用磁悬浮吸积的假设来解释,在这种假设中,表面磁场为10^12 G的恒星以10^14 g/s的速率从非开普勒磁性化石盘吸积物质到其表面。中子星可以在大质量X射线双星(HMXB)中演化到这种状态,HMXB在其大质量成分的核心坍缩提供动力的超新星爆炸中解体。以这种方式形成的孤立X射线脉冲星的寿命可以长达几千年。

英文摘要:

A scenario of the formation of isolated X-ray pulsars is discussed with an application to one of the best studied objects of this class 1E 161348-5055. This moderately luminous, 10^33 - 10^35 erg/s, pulsar with a relatively soft spectrum, kT ~ 0.6-0.8 keV, is associated with an isolated neutron star, which is located near the center of the young (~2000 yr) compact supernova remnant RCW 103 and rotates steadily (|dν/dt| < 2.6 x 10^-18 Hz/s) with the period of 6.7 hr. We show that in the current epoch the neutron star is in the accretor state. The parameters of the source emission can be explained in terms of the magnetic-levitation accretion scenario in which the star with the surface magnetic field of 10^12 G accretes material onto its surface from a non-Keplerian magnetic fossil disk at the rate 10^14 g/s. A neutron star could evolve to this state in a High-Mass X-ray Binary (HMXB), which had disintegrated during the supernova explosion powered by the core-collapse of its massive component. The life-time of an isolated X-ray pulsar formed this way can be as long as a few thousand years.

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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