NGC 5907的观测重建时空：暗物质修正的黑洞热力学与星系阴影
Observationally Reconstructed Spacetime of NGC 5907: Dark-Matter-Corrected Black Hole Thermodynamics and Galactic Shadow
- Jadavpur University（贾达普大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
该研究通过观测旋转曲线重建NGC 5907星系黑洞时空，获得暗物质修正度规，分析其热力学稳定性与引力阴影，并与WISE观测一致，统一了星系动力学与黑洞物理。
AI中文摘要：
我们提出了一个由观测引导的相对论框架，用于研究NGC 5907星系中黑洞的热力学和光学性质。通过直接从观测到的旋转曲线重建时空，我们获得了一个暗物质修正的度规，该度规同时包含了星系晕和中心致密天体。重建的几何允许存在视界解，使我们能够评估霍金温度、贝肯斯坦-霍金熵和热容，这些表明一个受其暗物质环境影响的、热力学稳定的超大质量黑洞。我们进一步分析了光子运动和由此产生的引力阴影，推导出光子球、临界碰撞参数和阴影大小。与WISE W1红外测光的比较显示，与预测的阴影半径附近光子逃逸抑制一致。这些结果在星系旋转曲线、暗物质、黑洞热力学和可观测的光度特征之间建立了统一的联系。
英文摘要：
We present an observationally guided relativistic framework to investigate the thermodynamic and optical properties of a black hole in the NGC 5907 galaxy. By reconstructing the spacetime directly from the observed rotation curve, we obtain a dark-matter-corrected metric that incorporates both the galactic halo and the central compact object. The reconstructed geometry admits horizon solutions, allowing us to evaluate the Hawking temperature, Bekenstein-Hawking entropy, and heat capacity, which indicate a thermodynamically stable supermassive black hole influenced by its dark matter environment. We further analyze photon motion and the resulting gravitational shadow, deriving the photon sphere, critical impact parameter, and shadow size. Comparison with WISE W1 infrared photometry shows consistency with the predicted suppression of photon escape near the shadow radius. These results establish a unified link between galactic rotation curves, dark matter, black hole thermodynamics, and observable photometric signatures.
