超爱丁顿吸积盘的临界光度

发布时间：2018-06-09 23:38

本文选题：吸积 + 吸积盘　；参考：《中国科学:物理学力学天文学》2016年08期

【摘要】：Slim盘是一类光学厚、几何厚度可以和半径相当的径移主导吸积盘,广泛应用于解释超爱丁顿吸积的观测现象.超爱丁顿吸积流的数字模拟显示外流的存在,意味着盘上只有一小部分的气体被黑洞吞入.本文在研究Slim盘的时候,垂向采用准确的引力作用,计算结果显示吸积盘的垂向存在引力的上限,吸积盘的外部区域存在吸积率上限,该上限值随半径的变化而变化.该结果表明,在超爱丁顿吸积的情况下,只有盘的内部区域可能以Slim盘的形式存在,而外部区域需要通过某种机制损失物质,这种机制很可能就是外流,这个结果与数值模拟的结果相符.最后,本文拟合了盘光度L/L disk Edd随无量纲化吸积率m的变化曲线,得到盘光度与吸积率关系的解析表达式.
[Abstract]:The Slim disk is a class of optical thick, geometric thickness and radius shift leading accretion disk, which is widely used to explain the observation phenomenon of the superEddington accretion. The digital simulation of the super Eddington Accretion Flow shows the existence of the outflow, which means only a small portion of the gas is swallowed by the black hole. This paper is vertically adopted in the study of the Slim disk. The calculated results show that the upper limit of the gravitational force exists in the vertical direction of the accretion disk, and the upper limit of accretion rate exists in the external region of the accretion disk, and the upper limit changes with the radius of the accretion disk. The result shows that only the internal region of the disk can exist in the form of Slim disk in the case of super Eddington accretion, and the external region needs to be passed through. A mechanism is likely to be a loss of material. This mechanism is probably outflow. The result is in agreement with the results of numerical simulation. Finally, this paper fits the curve of the L/L disk Edd of disc photometry with the dimensionless accretion rate M, and obtains the analytical expression of the relationship between the disc photometry and accretion rate.
【作者单位】：厦门理工学院福建省光电技术与器件重点实验室;
【基金】：国家自然科学基金资助项目(编号:U1231101)
【分类号】：P14

【相似文献】