大质量Seyfert星系中磁通量的中心积累作为触发高能宇宙射线的可能引擎
Central accumulation of magnetic flux in massive Seyfert galaxies as a possible engine to trigger ultrahigh energy cosmic rays
摘要：
在本文中，我们研究了从Seyferts产生的高能宇宙射线（UHECR）。我们讨论了两种可能的发动机触发模型：纯辐射转移和极向磁通量的能量提取获得的UHECR光度。第一种情况是由克尔细长盘或邦迪吸积机制。由于假设塞弗特的宽带光谱表明至少它们的吸积盘的外部是冷的和几何薄的，并且由于我们的结果指出随之而来的辐射能量传递是低效的，我们建立了第二种方法，其基础是具有足够中心极向磁场的大质量塞弗茨，以触发磁驱动带电粒子的外流，从而能够解释观测到的UHECR和伽马在地球实验中，来自给定的塞弗特源的射线。
英文摘要：
In the present paper we investigate the production of ultrahigh energy cosmic rays (UHECRs) from Seyferts. We discuss the UHECR luminosities obtained by two possible engine trigger models: pure radiative transfer and the energy extraction from poloidal magnetic flux. The first case is modeled by Kerr slim disk or Bondi accretion mechanisms. Since it is assumed that the broadband spectra of Seyferts indicate that at least the outer portions of their accretion disks are cold and geometrically thin, and since our results point that the consequent radiative energy transfer is inefficient, we build the second approach based on massive Seyferts with sufficient central poloidal magnetic field to trigger an outflow of magnetically driven charged particles capable to explain the observed UHECRs and gamma rays in Earth experiments from a given Seyfert source.
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