Magnetically Supported Accretion Disks Around Black Holes: Observational Diagnostics from Numerical Simulations

黑洞周围的磁力支持吸积盘：数值模拟的观测诊断

• 批准号: 1602169
• 负责人: Greg Salvesen
• 金额: $ 8.9万
• 依托单位: Salvesen Greg
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-10-01 至 2019-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1602169&HistoricalAwards=false
• 关键词: Magnetically; Supported; Accretion; Disks; Around

Greg Salvesen is awarded an NSF Astronomy and Astrophysics Postdoctoral Fellowship to carry out a program of research and education at the University of California, Santa Barbara. Salvesen will perform advanced numerical simulations to understand how strong magnetic fields influence black hole X-ray Binaries (BH XRBs), which consist of a black hole feeding on a disk of X-ray emitting gas from a companion star. Understanding BH XRBs is key to learning about other types of black holes as well. The center of nearly every galaxy (including our own) hosts a supermassive black hole surrounded by a disk of gas, but supermassive black holes are very difficult to understand because they change very little over our lifetimes. Because BH XRBs are thought to be scaled down versions of supermassive black holes, and exhibit changes on timescales accessible to astronomers, they are ideal laboratories for studying how material accretes around a black hole. Alongside this work, Salvesen will create a website featuring real astronomical data that have been converted into sound samples, and he will develop workshops to convey classroom astronomy concepts through sound to K-12 students with visual impairments or limited English proficiency.Salvesen will undertake numerical simulations of strongly magnetized accretion disks to calculate two direct observable quantities of BH XRBs: (1) the spectrum of light emitted by an accretion disk subjected to magnetic fields of various strengths and geometries, as well as quasi-periodic oscillations produced by accretion disk variability; and (2) the spectrum of light absorbed by magnetically driven disk winds, and manifested in diagnostic probes (e.g., spectral lines of highly ionized atoms). Salvesen will then compare the simulations with the observed properties of BH-XRBs to determine if the emission and absorption spectra of these objects can be used to understand the influence of strong magnetic fields on black hole accretion disks. Salvesen will also create the Astronomy Sound of the Month (ASOM) website and develop "sonification" workshops to convey basic astronomy concepts to visually impaired or English-language learning K-12 students.

格雷格·萨尔维森（Greg Salvesen）被授予NSF天文学和天体物理学博士后奖学金，以在加利福尼亚大学圣塔芭芭拉分校进行研究和教育计划。 Salvesen将执行高级数值模拟，以了解强磁场如何影响黑洞X射线二进制文件（BH XRBS），该二进制二进制（BH XRB）由黑洞组成，该黑洞在X射线散发出来自伴侣星的X射线发射气体的磁盘上。了解BH XRB是学习其他类型的黑洞的关键。几乎每个星系（包括我们自己的）的中心都有一个被磁盘包围的超级质量黑洞，但是超级质量的黑洞很难理解，因为它们一生中的变化很小。因为认为BH XRB被认为是超级质量黑洞的版本，并且展示了天文学家可以访问的时间标准的变化，因此它们是研究如何在黑洞周围积聚材料的理想实验室。除这项工作外，Salvesen还将创建一个网站，其中包含已转换为合理样本的真实天文学数据，他将开发研讨会，通过声音向具有视觉障碍或英语能力有限的K-11学生传达教室天文学概念。Salvesen将对通过强烈磁性磁性磁盘进行数字模拟进行数值，以实现两个直接磁性的定量定量，以定量的量子定量bept bept beppt of beppert of beppert of b。磁盘受到各种强度和几何形状的磁场以及积聚磁盘变异性产生的准周期振荡的磁场； （2）被磁驱动的磁盘风吸收的光谱，并在诊断探针（例如，高度离子化原子的光谱线）中表现出来。然后，Salvesen将将模拟与观察到的BH-XRB的性质进行比较，以确定这些物体的发射和吸收光谱是否可以用于了解强磁场对黑洞积聚磁盘的影响。 Salvesen还将创建本月（ASOM）网站的天文学声音，并开发“超声”研讨会，以传达基本的天文学概念，以示意视力障碍或英语学习K-12学生。