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arXiv 2302.14403astro-ph.HE
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论磁捕获盘中的塞曼效应

On the Zeeman Effect in Magnetically-Arrested Disks

Yoshiyuki Inoue

AI总结:

提出磁捕获盘(MAD)的强磁场会引起X射线双星和活动星系核中Fe K$α$荧光线的塞曼分裂,未来卫星XRISM和Athena有望观测到该效应,为MAD提供观测证据。

摘要:

磁捕获盘(MAD)被认为是实现相对论性喷流形成的关键吸积阶段。然而,由于缺乏对吸积系统的磁场测量,MAD尚未得到观测证实。我们提出,伴随MAD的强磁场将在X射线双星和活动星系核中引起相对论性展宽的Fe K$α$荧光线的塞曼分裂,其中我们考虑了内吸积盘中的两相介质,即磁主导的热冕和冷反射体。这种几何结构由X射线观测所建议,并最近被数值模拟证实。尽管吸积流中的湍流会使分裂的谱线展宽,但未来的X射线高能量分辨率卫星XRISM和Athena将能够在具有MAD构型的情况下观测到X射线双星中Fe线的塞曼效应。塞曼分裂谱线的特征将为MAD提供观测证据。

英文摘要:

Magnetically arrested disk (MAD) has been argued as the key accretion phase to realize the formation of relativistic jets. However, due to the lack of magnetic field measurements of accreting systems, MAD has not been observationally confirmed yet. Here we propose that a strong magnetic field accompanied by MAD would induce the Zeeman splitting of relativistically broadened Fe K$α$ fluorescence lines in X-ray binaries and active galactic nuclei, where we consider a two-phase medium in the inner accretion disk, magnetically dominated hot corona and cold reflector. Such a geometrical configuration is suggested from X-ray observations and recently confirmed by numerical simulations. Although turbulence in accretion flows would broaden the split lines, future X-ray high-energy resolution satellites, XRISM and Athena, would be capable of seeing the Zeeman effect on the Fe lines in X-ray binaries in the case with the MAD configuration. The signature of the Zeeman split lines would provide observational evidence for MAD.

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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