arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0903.4173astro-ph.HE
收藏

微类星体GRS 1915+105吸积盘风对喷流的抑制

Jet Suppression by Accretion Disk Winds in the Microquasar GRS 1915+105

Joseph Neilsen, Julia C. Lee

摘要:

具有相对论喷流的恒星质量黑洞,也被称为微类星体,模仿类星体和活动星系核的行为。由于恒星质量黑洞周围的时间尺度比更遥远的超大质量黑洞周围的时间尺度小几个数量级,因此微类星体是研究黑洞系统中吸积盘演化和喷流形成的理想"实验室“。尽管对黑洞的研究揭示了一系列复杂的吸积活动,但触发和抑制喷流形成的机制仍然是一个谜。在这里,我们报告发现了一个广泛的发射线期间的强烈的硬X射线通量在微类星体GRS 1915+105,和高度电离的窄吸收线在较软的状态。我们认为,宽发射线时出现的内部吸积盘是由硬X射线照射,可能从喷流。相反,在较软的状态下,当喷流较弱或不存在时,吸收线出现,因为黑洞周围的强大辐射场将热风从吸积盘中驱走。我们的分析强烈地表明,这种风携带了足够的质量远离圆盘,阻止物质流入射电喷流。

英文摘要:

Stellar-mass black holes with relativistic jets, also known as microquasars, mimic the behavior of quasars and active galactic nuclei. Because timescales around stellar-mass black holes are orders of magnitude smaller than those around more distant supermassive black holes, microquasars are ideal nearby `laboratories' for studying the evolution of accretion disks and jet formation in black-hole systems. Although studies of black holes have revealed a complex array of accretion activity, the mechanisms that trigger and suppress jet formation remain a mystery. Here we report the discovery of a broad emission line during periods of intense hard X-ray flux in the microquasar GRS 1915+105, and highly ionized narrow absorption lines during softer states. We argue that the broad emission line arises when the inner accretion disk is illuminated by hard X-rays, possibly from the jet. In contrast, during softer states, when the jet is weak or absent, absorption lines appear as the powerful radiation field around the black hole drives a hot wind off the accretion disk. Our analysis strongly suggests that this wind carries enough mass away from the disk to halt the flow of matter into the radio jet.

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。

↑