Optical/Ultraviolet Emission From Active Galactic Nuclei

活动星系核的光学/紫外线发射

• 批准号: 9529230
• 负责人: Omer Blaes
• 金额: $ 17.48万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-06-01 至 2000-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9529230&HistoricalAwards=false
• 关键词: Optical; Ultraviolet; Emission; Active; Galactic

AST 95-29230 PI: Omer Blaes Optical/Ultraviolet Emission from active Galactic Nuclei The origin of the optical/UV spectrum in Active Galactic Nuclei is not currently understood. X-ray observations suggest that the standard thin accretion disk paradigm be altered in such a way that a substantial fraction of the gravitational energy be transferred and released outside the optically thick portion of the disk, but it is not clear that such a model can explain all the optical/UV observations. The PI will investigate the consequences of two-phase models (disk and overlying hot corona) for the optical and ultraviolet observations, concentrating in particular on the spectrum and polarization that a non-LTE, self-consistent, atmosphere code would produce. The model, which assumes that the disk and corona are locally coupled at each radius, will explore the parameter space defined by the fraction of accretion power dissipated in the corona and the coronal optical depth. The UV/optical response to X-ray variability will also be studied.

AST 95-29230主要研究者：奥默-布莱斯 活动星系核的光/紫外辐射 活动星系核的光学/紫外光谱的起源目前还不清楚。X射线观测表明，标准的薄吸积盘范式被改变，使得相当大一部分引力能量被转移并释放到盘的光学厚部分之外，但尚不清楚这样的模型是否可以解释所有的光学/紫外观测。PI将研究光学和紫外观测的两相模型（盘和覆盖的热日冕）的后果，特别是集中在非LTE，自洽，大气代码将产生的光谱和偏振。该模型，它假设在每个半径的磁盘和日冕局部耦合，将探索的参数空间定义的吸积功率耗散在日冕和日冕光学深度的分数。还将研究对X射线可变性的UV/光学响应。