论文标题
积聚磁盘周围裸露的奇异性
Accretion disks around naked singularities
论文作者
论文摘要
我们在这里调查了时空中吸积盘的热性能，以了解球形对称性中的某些银河密度谱。物质分布的外半径有限，裸中心奇异性。发现某些密度曲线模型的积聚磁盘的发光度比同一质量的Schwarzschild黑洞的亮度高。相对于频率的光度分布的斜率显着不同，尤其是在较高的频率下，与Schwarzschild Black Hole情况相比。这些特征可用于将黑洞与裸奇异点区分开。分析了积聚气体的质量能量转化为辐射的效率和裸奇异点的强度。我们发现的新颖特征是，奇点的强度取决于所考虑的曲线，奇异性越强，积聚磁盘的效率就越高。
We investigate here the thermal properties of accretion disks in a spacetime for some galactic density profiles in spherical symmetry. The matter distributions have a finite outer radius with a naked central singularity. The luminosities of the accretion disks for some density profile models are found to be higher than those for a Schwarzschild black hole of the same mass. The slopes for the luminosity distributions with respect to frequencies are significantly different, especially at higher frequencies, from that in the Schwarzschild black hole case. Such features may be used to distinguish black holes from naked singularities. The efficiencies for the conversion of the mass energy of the accreting gas into radiation and the strength of naked singularities are analyzed. The novel feature that we find is, the strength of the singularity is different depending on the profiles considered, and the stronger the singularity is, the higher is the efficiency for the accretion disk.
