Spatially Resolving the AGN Broad Emission Line Region
空间解析 AGN 宽发射线区域
基本信息
- 批准号:1909711
- 负责人:
- 金额:$ 39.41万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2019
- 资助国家:美国
- 起止时间:2019-09-01 至 2024-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Black holes millions to billions of times the mass of the sun occupy the centers of most galaxies. Hot gas falling onto these supermassive black holes radiates light, which can be bright enough for Astronomers to detect out to large distances corresponding to early stages in the history of the Universe. The mass of the central black hole informs our understanding how galaxies and black holes form and grow. The current method used to measure it depends on the assumption that fast moving gas is in orbit around the black hole. This project will test this basic assumption using data with sufficiently high angular resolution to see the gas motions directly. It will determine whether the gas is falling onto and growing the black hole, or flowing outwards and escaping. The observations will be assisted by monitoring using telescopes on the CU Boulder campus. The monitoring observations will be used to train students both inside and outside the classroom in astronomical observing, and particularly to provide early research experiences for undergraduates from traditionally underrepresented backgrounds.In this project the PI and team will use new data from the Very Large Telescope Interferometer beam combiner instrument GRAVITY to spatially resolve the kinematics and structure of the broad emission line region for a sample of 11 bright Type 1 AGN. Using kinematic models, they will measure the broad emission line radius and establish an interferometric radius-luminosity relation as an independent comparison to those obtained using reverberation mapping. From the modeling results they will infer the emission line region structure and the central black hole mass. In a few cases where both types of measurements exist, they will combine their results with those from velocity-resolved reverberation mapping to carry out detailed studies of the broad emission line structure and kinematics. The same data provide measurements of hot dust structure, which will be used to study the physical connection between the hot dust and atomic gas on sub-milliarcsecond scales. They will also develop and apply kinematic models of disk winds, including where the line emission is optically thick, to determine whether the dominant emission line kinematics is a result of a continuous outflow, or part of the inflow feeding the supermassive black hole. The VLTI/GRAVITY observations critically depend on visible AO performance, which is related to the variable optical brightness. The investigators will use visible wavelength monitoring observations using two 20" telescopes at the Sommers-Bausch Observatory on the CU Boulder campus to assist in target selection.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
质量是太阳数百万到数十亿倍的黑洞占据了大多数星系的中心。落到这些超大质量黑洞上的热气体会辐射出光,这些光可能足够明亮,天文学家可以探测到宇宙历史早期阶段的大距离。中心黑洞的质量告诉我们星系和黑洞如何形成和成长。目前用来测量它的方法依赖于快速移动的气体在黑洞周围轨道上的假设。本项目将使用具有足够高的角分辨率的数据来测试这一基本假设,以直接观察气体运动。它将确定气体是落在黑洞上并使其增长,还是向外流动并逃逸。这些观测将通过使用CU Boulder校园的望远镜进行监测来辅助。监测观测将用于培训学生在课堂内外的天文观测,特别是为传统上代表性不足的本科生提供早期研究经验。在这个项目中,PI和团队将使用来自甚大望远镜干涉仪光束组合器仪器GRAVITY的新数据,在空间上解析一个样本的宽发射线区域的运动学和结构。11个明亮的1型活动星系核。他们将使用运动学模型测量宽发射线半径,并建立干涉半径-光度关系,作为与使用混响映射获得的关系的独立比较。从模拟结果中,他们将推断出发射线区域的结构和中心黑洞质量。在少数情况下,两种类型的测量都存在,他们将联合收割机的结果与速度分辨混响映射进行详细的研究,广泛的发射线结构和运动学。同样的数据提供了热尘埃结构的测量结果,这些数据将用于在亚毫弧秒尺度上研究热尘埃和原子气体之间的物理联系。他们还将开发和应用盘风的运动学模型,包括线发射在光学上较厚的地方,以确定主要的发射线运动学是连续流出的结果,还是流入的一部分喂养超大质量黑洞。VLTI/GRAVITY观测主要依赖于可见光AO性能,这与可变的光学亮度有关。研究人员将使用两个20”望远镜在加州大学博尔德分校的萨默斯-鲍什天文台使用可见光波长监测观测,以协助目标选择。该奖项反映了NSF的法定使命,并已被认为是值得通过评估使用基金会的智力价值和更广泛的影响审查标准的支持。
项目成果
期刊论文数量(11)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Reprocessing Models for the Optical Light Curves of Hypervariable Quasars from the Sloan Digital Sky Survey Reverberation Mapping Project
斯隆数字巡天混响测绘项目的超变类星体光学光曲线的再处理模型
- DOI:10.3847/1538-4357/ace1e1
- 发表时间:2023
- 期刊:
- 影响因子:0
- 作者:Akiba, Tatsuya;Dexter, Jason;Brandt, W. N.;Ho, Luis C.;Homayouni, Y.;Schneider, Donald P.;Shen, Yue;Trump, Jonathan R.
- 通讯作者:Trump, Jonathan R.
An image of the dust sublimation region in the nucleus of NGC 1068
- DOI:10.1051/0004-6361/201936255
- 发表时间:2019-12
- 期刊:
- 影响因子:6.5
- 作者:R. Abuter;M. Accardo;T. Adler;A. Amorim;N. Anugu;G. Ávila;M. Bauböck;M. Benisty;J. Berger
- 通讯作者:R. Abuter;M. Accardo;T. Adler;A. Amorim;N. Anugu;G. Ávila;M. Bauböck;M. Benisty;J. Berger
Confronting a Thin Disk-wind Launching Mechanism of Broad-line Emission in Active Galactic Nuclei with GRAVITY Observations of Quasar 3C 273
- DOI:10.3847/1538-4357/ace4bb
- 发表时间:2023-07
- 期刊:
- 影响因子:0
- 作者:Kirk Long;J. Dexter;Yixian Cao;R. Davies;F. Eisenhauer;D. Lutz;D. Santos;J. Shangguan;T. Shimizu;E. Sturm
- 通讯作者:Kirk Long;J. Dexter;Yixian Cao;R. Davies;F. Eisenhauer;D. Lutz;D. Santos;J. Shangguan;T. Shimizu;E. Sturm
The Core of the Matter — Spatially Resolving Active Galactic Nuclei with GRAVITY
问题的核心 — 利用重力空间解析活动星系核
- DOI:
- 发表时间:2023
- 期刊:
- 影响因子:0
- 作者:Gravity Collaboration: Eckhard Sturm, Yixian Cao
- 通讯作者:Gravity Collaboration: Eckhard Sturm, Yixian Cao
Toward measuring supermassive black hole masses with interferometric observations of the dust continuum
通过对尘埃连续体的干涉观测来测量超大质量黑洞质量
- DOI:10.1051/0004-6361/202244655
- 发表时间:2023
- 期刊:
- 影响因子:6.5
- 作者:Amorim, A.;Bourdarot, G.;Brandner, W.;Cao, Y.;Clénet, Y.;Davies, R.;de Zeeuw, P. T.;Dexter, J.;Drescher, A.;Eckart, A.
- 通讯作者:Eckart, A.
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Jason Dexter其他文献
Jason Dexter的其他文献
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{{ truncateString('Jason Dexter', 18)}}的其他基金
Radiation GRMHD with Non-Thermal Particle Acceleration: Next-Generation Models of Black Hole Accretion Flows and Jets
具有非热粒子加速的辐射 GRMHD:黑洞吸积流和喷流的下一代模型
- 批准号:
2307983 - 财政年份:2023
- 资助金额:
$ 39.41万 - 项目类别:
Standard Grant
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