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arXiv 2409.02181astro-ph.HEastro-ph.COastro-ph.GAastro-ph.SR
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邻近潮汐瓦解事件数年后出现的准周期X射线爆发

Quasi-periodic X-ray eruptions years after a nearby tidal disruption event

M. Nicholl, D. R. Pasham, A. Mummery, M. Guolo, K. Gendreau, G. C. Dewangan, E. C. Ferrara, R. Remillard, C. Bonnerot, J. Chakraborty, A. Hajela, V. S. Dhillon,… 展开作者

M. Nicholl, D. R. Pasham, A. Mummery, M. Guolo, K. Gendreau, G. C. Dewangan, E. C. Ferrara, R. Remillard, C. Bonnerot, J. Chakraborty, A. Hajela, V. S. Dhillon, A. F. Gillan, J. Greenwood, M. E. Huber, A. Janiuk, G. Salvesen, S. van Velzen, A. Aamer, K. D. Alexander, C. R. Angus, Z. Arzoumanian, K. Auchettl, E. Berger, T. de Boer, Y. Cendes, K. C. Chambers, T. -W. Chen, R. Chornock, M. D. Fulton, H. Gao, J. H. Gillanders, S. Gomez, B. P. Gompertz, A. C. Fabian, J. Herman, A. Ingram, E. Kara, T. Laskar, A. Lawrence, C. -C. Lin, T. B. Lowe, E. A. Magnier, R. Margutti, S. L. McGee, P. Minguez, T. Moore, E. Nathan, S. R. Oates, K. C. Patra, P. Ramsden, V. Ravi, E. J. Ridley, X. Sheng, S. J. Smartt, K. W. Smith, S. Srivastav, R. Stein, H. F. Stevance, S. G. D. Turner, R. J. Wainscoat, J. Weston, T. Wevers, D. R. Young

AI总结:

本文报道在邻近潮汐瓦解事件AT2019qiz中探测到九次准周期X射线爆发,平均复发时间约48小时,并通过吸积盘多波段辐射建模提出绕转天体与盘碰撞是QPEs的合理解释。

摘要:

准周期爆发(QPEs)是来自星系核的软X射线明亮爆发,以数小时至数周的时间尺度重复出现。这些罕见系统背后的机制尚不确定,但大多数理论涉及超大质量黑洞(SMBHs)周围的吸积盘,这些吸积盘经历不稳定性或与近轨道上的恒星天体相互作用。有观点认为,该吸积盘可能在超大质量黑洞瓦解一颗经过的恒星时形成,这意味着许多QPEs之前应当存在可观测的潮汐瓦解事件(TDEs)。两个已知的QPE源显示出与TDEs一致的静息光度长期衰减,两个观测到的TDEs表现出与单次爆发一致的X射线耀发。TDEs和QPEs也优先出现在相似的星系中。然而,尚未有确认的重复性QPEs与光谱学确认的TDE或在峰值亮度时观测到的光学TDE相关联。在此我们报告从AT2019qiz——一个邻近且被广泛研究的光学选择TDE——探测到九次X射线QPEs,平均复发时间约为48小时。我们对来自吸积盘的X射线、紫外和光学辐射进行了探测和建模,并表明一个绕转天体与该吸积盘碰撞为这些QPEs提供了合理的解释。

英文摘要:

Quasi-periodic Eruptions (QPEs) are luminous bursts of soft X-rays from the nuclei of galaxies, repeating on timescales of hours to weeks. The mechanism behind these rare systems is uncertain, but most theories involve accretion disks around supermassive black holes (SMBHs), undergoing instabilities or interacting with a stellar object in a close orbit. It has been suggested that this disk could be created when the SMBH disrupts a passing star, implying that many QPEs should be preceded by observable tidal disruption events (TDEs). Two known QPE sources show long-term decays in quiescent luminosity consistent with TDEs, and two observed TDEs have exhibited X-ray flares consistent with individual eruptions. TDEs and QPEs also occur preferentially in similar galaxies. However, no confirmed repeating QPEs have been associated with a spectroscopically confirmed TDE or an optical TDE observed at peak brightness. Here we report the detection of nine X-ray QPEs with a mean recurrence time of approximately 48 hours from AT2019qiz, a nearby and extensively studied optically-selected TDE. We detect and model the X-ray, ultraviolet and optical emission from the accretion disk, and show that an orbiting body colliding with this disk provides a plausible explanation for the QPEs.

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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