AI 中文总结
研究修正引力中经辛普森 - 维瑟正则化的致密天体，推导其霍金温度、热容量等热力学性质及辐射特性，发现增加修正参数扩视界增发射，增加黑反弹参数则相反，可为区分该致密天体提供观测特征。
AI 中文摘要
我们研究了通过对修正引力中的史瓦西黑洞应用辛普森 - 维瑟正则化得到的规则致密天体的热力学性质和辐射特性。所得的SV - MOG时空，其消逝函数涉及MOG耦合参数和黑反弹参数，根据参数在规则黑洞、单向虫洞和可穿越虫洞之间平滑插值。我们推导了黑洞和虫洞分支的霍金温度和热容量，确定了由热容量符号变化标志的二阶相变。通过系数参数化的对数项纳入了对熵的量子引力修正，并且我们表明在小视界半径下与贝肯斯坦 - 霍金面积定律的偏差变得显著。对于辐射部分，我们计算了围绕黑洞和虫洞构型的几何薄吸积盘的电磁通量、有效盘温度和光谱光度。我们的结果表明，增加修正参数会扩大事件视界并增强发射，而增加黑反弹参数会抑制视界并使光谱轮廓变软，提供了可将SV - MOG致密天体与其史瓦西和纯SV对应物区分开来的观测特征。
英文摘要
We study the thermodynamic properties and radiation characteristics of a regular compact object obtained by applying the Simpson-Visser (SV) regularisation to the Schwarzschild modified gravity black hole. The resulting SV-MOG spacetime, whose lapse function involves both the MOG coupling parameter alpha and the black-bounce parameter l, smoothly interpolates between a regular black hole, a one-way wormhole, and a traversable wormhole depending on the parameter l. We derive the Hawking temperature and heat capacity for the black hole branch, identifying second-order phase transitions signaled by sign changes in CV, and, for the horizonless wormhole branch where no causal horizon and hence no genuine Hawking radiation exists we instead construct a physically well-defined effective temperature from the Lyapunov exponent of the unstable photon sphere. Quantum gravitational corrections to the entropy are incorporated via logarithmic terms parameterized by coefficients beta1, beta2, whose theoretically preferred ranges in loop quantum gravity and string theory we discuss, and we show that deviations from the Bekenstein-Hawking area law become significant at small horizon radii. A linear scalar-perturbation analysis further shows that the effective radial potential remains non-negative throughout the black-hole exterior and across the wormhole throat, indicating stability against monopole perturbations independently of the thermodynamic stability inferred from the heat capacity.
Comments19 pages, 11 figures, submitted to European Physical Journal C
