我们开发了一种数值方法，用于寻找与由一般密度轮廓描述的各向异性流体耦合的渐近平坦黑洞解。我们的模型允许在现实天体物理场景中进行多种应用，并且有可能描述宿主超大质量黑洞的星系几何、暗物质环境和吸积现象。我们将我们的框架应用于被不同暗物质轮廓家族包围的黑洞，即 Hernquist、Navarro-Frenk White 和 Einasto 模型。我们研究了此类时空中光和有质量粒子的测地线运动。此外，我们计算了由数值背景上的小次级天体引起的引力轴微扰，并确定了与真空情况相比发射引力波通量的变化。我们的分析证实并扩展了先前的研究，表明轨道频率和轴向通量的修改可以用引力红移来描述，而与晕模型无关。
英文摘要：
We develop a numerical approach to find asymptotically flat black hole solutions coupled to anisotropic fluids, described by generic density profiles. Our model allows for a variety of applications in realistic astrophysical scenarios, and is potentially able to describe the geometry of galaxies hosting supermassive black holes, dark matter environments and accretion phenomena. We apply our framework to a black hole surrounded by different families of dark matter profiles, namely the Hernquist, the Navarro-Frenk White and the Einasto models. We study the geodesic motion of light and of massive particles in such spacetimes. Moreover we compute gravitational axial perturbations induced by a small secondary on the numerical background, and determine the changes in the emitted gravitational wave fluxes compared to the vacuum case. Our analysis confirms and extend previous studies showing that modifications of orbital frequencies and axial fluxes can be described in terms of gravitational-redshift, regardless of the halo model.
The Optical Appearance of Charged Four-Dimensional Gauss-Bonnet Black Hole with Strings Cloud and Non-Commutative Geometry Surrounded by Various Accretions Profiles
Shadows of Sgr A$^*$ Black Hole Surrounded by Superfluid Dark Matter Halo
本文构造了一个被超流暗物质（BH-SFDM）和重子物质包围的黑洞解，研究了它们对Sgr A $^{*}$黑洞阴影像的影响.为了实现这一目标，我们考虑了两个密度分布的重子物质所描述的球形指数分布和幂律分布，包括一个特殊的情况下，描述一个完全占主导地位的暗物质星系（TDDMG）。利用Sgr A $^{*}$黑洞的超流暗物质和重子密度分布参数的当前值，我们发现与Kerr真空黑洞相比，超流暗物质和重子物质对阴影大小的影响几乎可以忽略.此外，我们发现，随着重子质量的增加，阴影的大小显著增加。这一结果可以联系到在星系中的物质分布，即重子物质主要位于银河系中心，因此，通过增加重子物质可以影响黑洞阴影的大小相比，完全占主导地位的暗物质星系，我们观察到的角直径的增加Sgr A $^{*}$黑洞的大小为$10^{-5} μ$角秒。
Optical appearance of the Konoplya-Zhidenko rotating non-Kerr black hole surrounded by a thin accretion disk
Department of Mechanics, Chongqing Jiaotong University（重庆交通大学力学系）；College of Physics and Electronic Engineering, Chongqing Normal University（重庆师范大学物理与电子工程学院）
Black holes in general relativity coupled with NEDs surrounded by PFDM: thermodynamics, epicyclic oscillations, QPOs, and shadow
The Assam Royal Global University（阿萨姆皇家全球大学）；New Uzbekistan University（新乌兹别克斯坦大学）；Institute of Fundamental and Applied Research, National Research University TIIAME（基础与应用研究所，国立研究大学TIIAME）；University of Tashkent for Applied Sciences（塔什干应用科学大学）；Tashkent State Technical University（塔什干国立技术大学）
Optical Signatures of Black Holes Surrounded by a Generalized Cloud of Strings
University of Valladolid UVA（巴利亚多利德大学）；Universidade Federal do Pará（帕拉联邦大学）；Universidade Federal do Sul e Sudeste do Pará（南和东南帕拉联邦大学）；Universidade Federal do Espírito Santo（圣埃斯皮里图联邦大学）；Universidade Federal do Ceará（塞阿拉联邦大学）
Shadows of rotating traversable wormholes surrounded by plasma
Faculty of Physics, Sofia University “St. Kliment Ohridski”（索非亚大学“圣克利门特·奥赫里德斯基”物理学院）；Institute of Mathematics and Informatics, Bulgarian Academy of Sciences（保加利亚科学院数学与信息学研究所）
Junction Conditions, Radial Stability, Thermodynamics, Optical Geometry and Appearance of Polymer-Quintessence Thin-Shell Wormholes
Instituto Federal de Educação, Ciência e Tecnologia do Ceará (IFCE)（塞阿拉联邦教育、科学与技术学院）；Universidade Federal do Cariri (UFCA)（卡拉里联邦大学）；Universidade Estadual do Ceará (UECE)（塞阿拉州立大学）
Gravitational radiation reaction around a static black hole surrounded by a Dehnen type dark matter halo
The Institute for Research in Fundamental Sciences (IPM)（伊朗基础科学研究所）；Dipartimento di Fisica e Astronomia, Alma Mater Università di Bologna（博洛尼亚大学物理与天文学系）；Istituto Nazionale di Fisica Nucleare, I.S. FLaG, Sezione di Bologna（意大利国家核物理研究所博洛尼亚分部）；Alma Mater Research Center on Applied Mathematics (AM 2 )（阿尔玛·mater应用数学研究中心）；Università di Camerino, Divisione di Fisica（卡梅里诺大学物理系）；Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Perugia（意大利国家核物理研究所佩鲁贾分部）；INAF - Osservatorio Astronomico di Brera（意大利国家天体物理研究所布雷拉天文台）；Al-Farabi Kazakh National University（法拉比哈萨克国立大学）
Observational properties of a Schwarzschild black hole surrounded by a Dehnen-type dark matter halo
Yunnan Observatories, Chinese Academy of Sciences（中国科学院云南天文台）；Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences（中国科学院天体结构与演化重点实验室）；International Centre of Supernovae, Yunnan Key Laboratory（超新星国际研究中心，云南省重点实验室）；College of Physics, Guizhou University（贵州大学物理学院）
Thermodynamics, Joule-Thomson Expansion and Ruppeiner Geometry of a Dyonic NED-AdS Black Hole Surrounded by Quintessence
University of Maroua（马里瓦大学）；Higher Teachers’ Training College, University of Maroua（马里瓦大学高等师范培训学院）；University of Yaoundé I（雅温得第一大学）；Botswana International University of Science and Technology（博茨瓦纳国际科学技术大学）
