Effects of dark matter on shadows and rings of Brane-World black holes illuminated by various accretions
Effects of dark matter on shadows and rings of Brane-World black holes illuminated by various accretions
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暗物质对各种吸积照亮的膜世界黑洞阴影和环的影响
DOI：
10.1007/s11433-022-1896-0
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发表时间：
2021-11
期刊：
影响因子：
--
通讯作者：
Guo-Ping Li
中科院分区：
文献类型：
--
作者：
Xiao-Xiong Zeng;Ke-Jian He;Guo-Ping Li
在这项研究中，通过考虑吸积，数值研究了当观测者位于宇宙视界时，Brane-World黑洞所投射的阴影和光环。结果表明，光子球半径Rp随宇宙学参数α和暗物质参数β的增大而增大，而碰撞参数BP随α的增大而减小，随β的增大而增大。对于薄盘吸积，总观测强度主要由直接发射组成。同时，透镜环和光子环的贡献分别很小和可以忽略不计。我们还发现，当圆盘位于不同的位置时，阴影和光环表现出不同的令人兴奋的特征。对于静态的和入射的球形吸积，很明显，阴影的大小对于这两个吸积总是相同的。这意味着在这种情况下，阴影只与时空几何体相关。阴影和光子球体的光度与多普勒效应和单位体积发射率j(Ve)密切相关。此外，本文还着重讨论了暗物质和宇宙常数对观测到的阴影和光环强度的影响。最后，利用视界望远镜的标称分辨率得到了阴影和光环的毛刺图像。我们还利用M87的阴影数据研究了X-COLD暗物质参数β的上限。
In this study, by taking the accretions into account, the observed shadows and rings cast by the Brane-World black hole were numerically investigated when the observer was located at the cosmological horizon. The results showed that the radius rp of the photon sphere increased with the cosmological parameter α and dark matter parameter β, while the impact parameter bp decreased with α and increased with β. For thin disk accretion, the total observed intensity is mainly composed of direct emission. Simultaneously, the lensing ring and photon ring have only small and negligible contributions, respectively. We also found that shadows and rings exhibit different and exciting features when the disk is located at different positions. For static and infalling spherical accretions, it is evident that the size of shadows is always the same for both accretions. This implies that shadows are only related to space-time geometry in this case. The luminosity of the shadow and photon sphere is closely associated with the Doppler effect and the emissivity per unit volume j(ve). In addition, the influence of dark matter and cosmological constant on the observed intensity of shadows and rings is carefully emphasized throughout this paper. Finally, we obtained the burring images of shadows and rings using the nominal resolution of the event horizon telescope. We also studied the upper limits of the X-clod dark matter parameter β using the data of the shadow of M87.
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DOI：
10.1142/9789811269776_0318
发表时间：
2023-01
期刊：
The Sixteenth Marcel Grossmann Meeting
影响因子：
--
作者：
V. Bozza
通讯作者：
V. Bozza
二次简并高阶标量张量理论中不形克尔黑洞的影子
DOI：
10.1140/epjc/s10052-020-08744-8
发表时间：
2020-12
期刊：
Eur. Phys. J. C
影响因子：
--
作者：
龙芬;陈松柏;王明智;荆继良
通讯作者：
荆继良
DOI：
10.1103/physrevd.103.025005
发表时间：
2020-10
期刊：
arXiv: General Relativity and Quantum Cosmology
影响因子：
--
作者：
Ming Zhang;Jie Jiang
通讯作者：
Ming Zhang;Jie Jiang
影响因子：
5
作者：
Gan Qingyu;Wang Peng;Wu Houwen;Yang Haitang
通讯作者：
Yang Haitang
影响因子：
3.6
作者：
K. He 何;Sen 森 Guo 郭;Shuang-Cheng 双成 Tan 谭;G. Li 李
通讯作者：
K. He 何;Sen 森 Guo 郭;Shuang-Cheng 双成 Tan 谭;G. Li 李