Physics of Accretion Disks Around Black Holes
黑洞周围吸积盘的物理学
基本信息
- 批准号:0205806
- 负责人:
- 金额:$ 35.82万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2002
- 资助国家:美国
- 起止时间:2002-09-15 至 2006-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
AST 0205806KrolikBlack holes are tremendously powerful sources of light. In aggregate, the total light power produced by black holes in the Universe is almost as much as that generated by stars. However, the mechanism by which black holes are able to radiate so much light has remained mysterious for many years. The fundamental reason for this mystery is that, without friction, matter in orbit around a massive object would go round and round forever, and no energy would be released at all. Except for the region immediately outside its edge, this rule is as true for a black hole as for an ordinary object. Because friction caused by ordinary viscosity is far too weak to account for the observed rate at which mass is swallowed by black holes; the source of this friction had been a mystery for decades. During the 1990s, however, we gradually gained confidence in what was once the speculative suggestion that tangled magnetic fields would spontaneously grow in strength in accreting matter, and the forces they create would be strong enough to provide the necessary "friction".Since calculations of tangled magnetic field forces are very complex they must be done with large computer simulations. This project will conduct a coherent program of large-scale numerical simulations with a pair of goals: a) to compute how the magnetic forces control the total amount of energy released in black hole accretion; and b) to show how the released energy finds its way into heat, and then the light that we see.***
AST 0205806 KrolikBlack holes are amazingly powerful sources of light.黑洞是非常强大的光源。 总的来说,宇宙中黑洞产生的总光功率几乎与恒星产生的光功率一样多。 然而,黑洞能够辐射如此多的光的机制多年来一直是个谜。这个谜团的根本原因是,如果没有摩擦力,物质在围绕一个巨大物体的轨道上将永远旋转,并且根本不会释放能量。 除了在黑洞边缘外的区域,这一规则对黑洞和普通物体一样适用。因为由普通粘性引起的摩擦力太弱,无法解释黑洞吞噬质量的观测速率;这种摩擦力的来源几十年来一直是个谜。 然而,在20世纪90年代,我们逐渐对曾经的推测有了信心,即纠缠磁场会在吸积物质的过程中自发地增强强度,它们产生的力将足以提供必要的“摩擦力”。由于纠缠磁场力的计算非常复杂,它们必须通过大型计算机模拟来完成。这个项目将进行一个大规模数值模拟的连贯程序,有两个目标:a)计算磁力如何控制黑洞吸积中释放的能量总量;和B)显示释放的能量如何进入热量,然后是我们看到的光。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Julian Krolik其他文献
Dust-filled doughnuts in space
太空中沾满灰尘的甜甜圈
- DOI:
10.1038/429029a - 发表时间:
2004-05-06 - 期刊:
- 影响因子:48.500
- 作者:
Julian Krolik - 通讯作者:
Julian Krolik
Julian Krolik的其他文献
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{{ truncateString('Julian Krolik', 18)}}的其他基金
Collaborative Research: Deploying Curvilinear Coordinate and Multipatch Methods on Neutron Star Mergers
合作研究:在中子星合并中部署曲线坐标和多面体方法
- 批准号:
2110339 - 财政年份:2021
- 资助金额:
$ 35.82万 - 项目类别:
Standard Grant
WoU-MMA: Collaborative Research: Supermassive Binary Black Holes: Accretion Dynamics and Electromagnetic Output
WoU-MMA:合作研究:超大质量双黑洞:吸积动力学和电磁输出
- 批准号:
2009260 - 财政年份:2020
- 资助金额:
$ 35.82万 - 项目类别:
Standard Grant
Collaborative Research: Photons from Binary Black Hole Inspiral
合作研究:来自双黑洞螺旋的光子
- 批准号:
1811287 - 财政年份:2018
- 资助金额:
$ 35.82万 - 项目类别:
Standard Grant
Collaborative Research: Curvilinear and Multipatch Methods for General Relativistic Astrophysics in the Gravitational Wave Era
合作研究:引力波时代广义相对论天体物理学的曲线和多面体方法
- 批准号:
1707826 - 财政年份:2017
- 资助金额:
$ 35.82万 - 项目类别:
Standard Grant
Collaborative Research: Accretion Dynamics of Black Hole Mergers
合作研究:黑洞合并的吸积动力学
- 批准号:
1516299 - 财政年份:2015
- 资助金额:
$ 35.82万 - 项目类别:
Standard Grant
Collaborative Research: Predicting the Transient Signals from Glactic Centers: Circumbinary Disks and Tidal Disruptions around Black Holes
合作研究:预测来自银河系中心的瞬态信号:环形盘和黑洞周围的潮汐扰动
- 批准号:
1516247 - 财政年份:2015
- 资助金额:
$ 35.82万 - 项目类别:
Standard Grant
CDI-Type II: Collaborative Research: Computing Supermassive Black Hole Mergers in Astrophysics
CDI-Type II:合作研究:计算天体物理学中的超大质量黑洞合并
- 批准号:
1028111 - 财政年份:2010
- 资助金额:
$ 35.82万 - 项目类别:
Continuing Grant
Collaborative Research: The Physics of Accretion Disks
合作研究:吸积盘的物理学
- 批准号:
0908336 - 财政年份:2009
- 资助金额:
$ 35.82万 - 项目类别:
Continuing Grant
Physics of Accretion Disks Around Black Holes
黑洞周围吸积盘的物理学
- 批准号:
0507455 - 财政年份:2005
- 资助金额:
$ 35.82万 - 项目类别:
Continuing Grant
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Accretion variability and its consequences: from protostars to planet-forming disks
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Are Active Galactic Nuclei accretion disks too big?
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Neutrino surfaces in black hole accretion disks
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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
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