新乌龟坐标变换下的动态Kinnersley黑洞的Hawking辐射  

Hawking radiation of dynamical Kinnersley black hole under the new tortoise coordinate transformation

作　　者：潘伟珍[1] 杨学军[1] 骆金彩[1] 

机构地区：[1]绍兴文理学院物理与电子信息系,绍兴312000

出　　处：《物理学报》2011年第10期831-836,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10873003;11045005);浙江省自然科学基金(批准号:Y6090739)资助的课题~~

摘　　要：采用两种新的乌龟坐标变换,用改进的Damour-Ruffini方法研究了动态Kinnersley黑洞的Hawking辐射.在新乌龟坐标变换下,将Klein-Gordon方程在视界附近变换成平直时空的标准波动方程形式,得到了黑洞的表面引力及Hawking温度,该温度在黑洞表面不同点有不同的值.值得注意的是,旧的乌龟坐标变换存在量纲错误,新乌龟坐标变换没有量纲问题,选不同的旧乌龟坐标变换计算同一黑洞所得结果不同,但是采用不同的新乌龟坐标变换所得结果仍然不同.With two new tortoise coordinate transformations,Hawking effect from a dynamical Kinnersley black hole is investigated by using the improved Damour-Ruffini method.After the tortoise coordinate transformation,the Klein-Gordon equation can be written in the standard form at the event horizon.Then extending the outgoing wave from outside to inside of the horizon analytically,the surface gravity and the Hawking temperature can be obtained automatically.It is found that Hawking temperature of different points on the surface are different.There is a problem of dimension in the usual tortoise coordinate and the results are different from those of the same black hole by using two different tortoise coordinate transformations.The results obtained by using two new tortoise coordinate transformations are still different.

关 键 词：黑洞 乌龟坐标变换 HAWKING辐射 Klein-Gorden方程 

分 类 号：P145.8[天文地球—天体物理]