一种新Tortoise坐标变换下的Vaidya-Bonner-de Sitter黑洞的熵

采用一种新的广义乌龟坐标变换对VaidyaBonnerde Sitter黑洞的熵进行研究，同时对其在旧乌龟坐标变换下的情况也做了对比分析.其结果表明两种情况下熵的形式相近，但是，新的广义乌龟坐标的结果对VaidyaBonnerde Sitter黑洞的熵做了相应的修正，新的乌龟坐标变换显得更加合理.

Entropy of Vaidya-Bonner-de sitter black hole with a new general tortoise coordinates

The principal focus of this paper is to study the entropy of Vaidya Bonner de Sitter black hole under a new general tortoise coordinate transformation, and then, to make the contrast and analysis of it with the old tortoise coordinates. It is found that the entropies obtained from both the new and old tortoise coordinate transformations are close to each other. The new general tortoise coordinate transformation makes the corresponding modification for the entropy of Vaidya Bonner de Sitter black hole and appears to be more reasonable.