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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Escape conditions of radiative-driven strati from luminous accretion disks
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Escape conditions of radiative-driven strati from luminous accretion disks

机译：辐射驱动地层从吸积盘逃逸的条件

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摘要

We examine the dynamical motion and escape conditions of continuum-driven strati (flat cloud) with finite optical depth from luminous accretion disks around a black hole. We adopt the near-disk approximation, and treat the problem in the framework of special relativity, where the radiation drag force as well as the radiation pressure are included. We find that the optically thin strati are easy to accelerate, compared with the particles, and the escape condition of the stratus is reduced. That is, when the disk luminosity is around the Eddington luminosity, the optically thin strati can escape from the inner disk (less than or similar to 20 r(g); r(g) being the Schwarzschild radius). When the disk luminosity is about half the Eddington luminosity, it can escape at around 5 r(g). This is due to the translucent effect. In addition, the trajectories of the strati are not vertical, but a funnel-like shape due to the centrifugal force. Stratus outflow could easily blow out from usual accretion disks with sub-Eddington luminosities, and this may explain outflows observed in broad absorption line quasars and ultra-fast outflow objects.
机译：我们研究了来自黑洞周围的发光吸积盘具有有限光学深度的，由连续介质驱动的地层（平云）的动力学运动和逃逸条件。我们采用近盘近似，并在狭义相对论的框架内处理该问题，其中包括辐射阻力和辐射压力。我们发现，与颗粒相比，光学上较薄的地层易于加速，并且地层的逃逸条件得以降低。也就是说，当圆盘的发光度在爱丁顿发光度附近时，光学薄层可以从内圆盘逸出（小于或类似于20 r（g）; r（g）为Schwarzschild半径）。当圆盘的光度约为爱丁顿光度的一半时，它的逸出量约为5 r（g）。这是由于半透明效果。另外，由于离心力，地层的轨迹不是垂直的，而是漏斗状的。层流很容易从具有亚爱丁顿光度的普通吸积盘中喷出，这可能解释了在宽吸收线类星体和超快速流出物中观察到的流出。

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