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arXiv 0905.2109astro-ph.GAgr-qchep-th
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用超临界黑洞驱动活动星系核

Powering AGNs with super-critical black holes

A. Avgoustidis, R. Jimenez, L. Alvarez-Gaume, M. A. Vazquez-Mozo

摘要:

我们提出了一种新的机制,通过超临界(II型)黑洞坍缩为活动星系核的中央发动机提供动力。在这张图片中,~ $10^3 M_\odot$的物质以相对论速度坍缩可以引发引力冲击,它可以以相对论速度喷射出大部分坍缩物质,留下一个“轻”的黑洞。在极向磁场的存在下,等离子体沿着两个喷流准直,并且相关的电子同步辐射可以很容易地解释所观测到的射电光度、大小和持续时间的活动星系核喷流。在洛伦兹因子为100量级,磁场为几百个$μG$的情况下,同步加速器电子可以发光$10^6$年,产生大小为100 kpc量级的喷流。这种机制也可能与伽马射线暴有关,在没有磁场的情况下,也可能与超新星爆炸有关。

英文摘要:

We propose a novel mechanism for powering the central engines of Active Galactic Nuclei through super-critical (type II) black hole collapse. In this picture, ~$10^3 M_\odot$ of material collapsing at relativistic speeds can trigger a gravitational shock, which can eject a large percentage of the collapsing matter at relativistic speeds, leaving behind a "light" black hole. In the presence of a poloidal magnetic field, the plasma collimates along two jets, and the associated electron synchrotron radiation can easily account for the observed radio luminosities, sizes and durations of AGN jets. For Lorentz factors of order 100 and magnetic fields of a few hundred $μG$, synchrotron electrons can shine for $10^6$ yrs, producing jets of sizes of order 100 kpc. This mechanism may also be relevant for Gamma Ray Bursts and, in the absence of magnetic field, supernova explosions.

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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