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arXiv 2401.04779gr-qc
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等离子体对 Kalb-Ramond 引力中旋转黑洞光学外观的影响及其在 M87* 和 Sgr A* 周围存在的可能性

Influence of plasma on the optical appearance of spinning black hole in Kalb-Ramond gravity and its Existence around M87* and Sgr A*

Muhammad Ali Raza, M. Zubair, Eiman Maqsood

AI总结:

本文研究等离子体介质对 Kalb-Ramond 引力旋转黑洞零测地线、阴影及蒸发率的影响,并结合 EHT 对 M87* 与 Sgr A* 的观测约束参数和可能的等离子体分布。

摘要:

可见宇宙充满了以恒星、星云和其他形式激发气体存在的不同类型等离子体介质。这些物质场对引力具有显著影响,并且由于黑洞强大的引力吸引,它们很可能存在于黑洞周围。由于等离子体介质会影响光速,因此我们研究了浸没在等离子体介质中的 Kalb-Ramond 引力旋转黑洞周围的零测地线和各种光学特征。研究考虑了多种等离子体分布,以比较它们在等离子体介质存在时对不稳定零圆轨道、黑洞阴影和蒸发率的影响。此外,还将阴影结果与 M87* 和 Sgr A* 的 Event Horizon Telescope 数据进行比较,以估计参数界限;在这些界限下,针对不同的等离子体参数值,Kalb-Ramond 引力中的旋转黑洞可被视为 M87* 或 Sgr A*。通过该分析,我们还发现了一种对上述特征具有显著影响、且最有可能存在于 M87* 和 Sgr A* 周围的等离子体分布。

英文摘要:

The visible universe is filled with different types of plasma media in the form of stars, nebulas and other forms of excited gases. These matter fields have a high influence on the gravity and are likely to be present around the black holes due to the immense gravitational attraction. Since a plasma medium affects the speed of light, therefore we investigated the null geodesics and various optical features around the rotating black hole in Kalb-Ramond gravity immersed in plasma medium. Various plasma distributions are considered to develop a comparative study for their influence on unstable null circular orbits, shadows and evaporation rate of the black hole in the presence of a plasma medium. Moreover, the shadow results are also compared with Event Horizon Telescope data for M78* and Sgr A* in order to estimate the parametric bounds for which the rotating black hole in Kalb-Ramond gravity is considered either M87* or Sgr A* under the different values of plasma parameters. From this analysis, we also found the distribution of plasma that has a significant impact on the above mentioned features and is most likely to be present around M87* and Sgr A*.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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