黑洞吸积盘内区温度的分布特征和演化特征

The Radial Temperature Profile in the inner Region of a Black-Hole Accretion Disk

对黑洞吸积盘内区温度的径向分布特征和演化特征作了详细的讨论．结果表明：（１）盘内区的温度并非随径向坐标ｒ单调减少，在接近盘的内边缘处有一个盘温的峰值环．在盘温的峰值环和盘的内边缘之间形成一个温度梯度很大的冷却区；（２）在盘吸积的过程中，盘内区温度的峰值和冷却区的平均温度梯度均随中心黑洞的无量纲角动量ａ的增加而单调增加，而金温峰值环半径和冷却区的径向宽度均随ａ的增加而单调减小；（３）盘的热辐射光度随ａ的增加而单调增加．

The radial profile of temperature in the inner region of a black-hole accretion disk isinvestigated in detail and it is found (1) that the temperature does not decrease monotonically in the radial direction, rather, a peak exists near the inner edge of the disk, separatedfrom it by a cooling region of a large temperature gradient and (2) that for increasing dimensionless angular momentum of the central black hole, the peak value and the averagetemperature gradient in the cooling region both increase while the radius of the peak valuering decreases, and the bolometric luminisity of accretion increases.