AI 中文总结
研究旋转正则巴丁黑洞嵌入PFDM且光子通过等离子体介质传播时的光学外观，分析三种等离子体模型对光子运动及阴影形态的影响，利用相关限制约束参数，结果显示黑洞成像可对周围介质及黑洞属性提供约束。
AI 中文摘要
我们研究了嵌入完美流体暗物质（PFDM）中的旋转正则巴丁黑洞在光子通过等离子体介质传播时的光学外观。研究了三种等离子体模型：均匀分布、径向变化分布以及具有径向和角向依赖性的一般分布。利用阴影可观测量分析了等离子体对光子运动和由此产生的阴影形态的影响。为评估天体物理可行性，使用事件视界望远镜对阴影圆度和分数直径偏差的限制来约束等离子体和PFDM参数。结果表明，PFDM和等离子体产生的环境效应会对阴影产生可测量的修正，这表明黑洞成像可以为周围介质以及正则旋转黑洞的固有属性提供有用的约束。
英文摘要
We study the optical appearance of a rotating regular Bardeen black hole embedded in perfect fluid dark matter (PFDM) when photon propagation occurs through a plasma medium. Three plasma models are examined: a homogeneous distribution, a radially varying distribution, and a general distribution with both radial and angular dependence. The influence of plasma on photon motion and the resulting shadow morphology is analysed using shadow observables. To assess astrophysical viability, the plasma and PFDM parameters are constrained using the Event Horizon Telescope bounds on shadow circularity and fractional diameter deviation. The results demonstrate that environmental effects arising from both PFDM and plasma produce measurable modifications to the shadow, indicating that black-hole imaging can provide useful constraints on the surrounding medium as well as the intrinsic properties of regular rotating black holes.
