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arXiv 0905.3238astro-ph.HEastro-ph.SR
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磁星、伽马射线暴和非常接近的双星

Magnetars, Gamma-ray Bursts, and Very Close Binaries

A. I. Bogomazov, S. B. Popov

摘要:

我们认为可能存在一个共同的通道的演化的双星系统,这导致在一个黑洞的形成过程中的伽马射线暴或磁星的诞生在一个中子星的形成。我们假设坍缩恒星核心的快速旋转可以用非常接近的双星的潮汐同步来解释。计算出的快速旋转中子星的形成速率与磁星形成速率的估计在性质上是一致的。然而,我们对具有短旋转周期的新生致密天体的二进制性的分析表明,其中二进制的比例大大超过了观测估计。为了使这个比例与磁星的统计数据相一致,磁星在形成过程中获得的额外速度必须主要垂直于超新星爆炸前的轨道平面,并且很大。

英文摘要:

We consider the possible existence of a common channel of evolution of binary systems, which results in a gamma-ray burst during the formation of a black hole or the birth of a magnetar during the formation of a neutron star. We assume that the rapid rotation of the core of a collapsing star can be explained by tidal synchronization in a very close binary. The calculated rate of formation of rapidly rotating neutron stars is qualitatively consistent with estimates of the formation rate of magnetars. However, our analysis of the binarity of newly-born compact objects with short rotational periods indicates that the fraction of binaries among them substantially exceeds the observational estimates. To bring this fraction into agreement with the statistics for magnetars, the additional velocity acquired by a magnetar during its formation must be primarily perpendicular to the orbital plane before the supernova explosion, and be large.

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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