Measurements of High-Mass Black Holes Through Stellar and Gas Dynamical Modeling

通过恒星和气体动力学模型测量高质量黑洞

基本信息

  • 批准号:
    1102845
  • 负责人:
  • 金额:
    $ 8.3万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Fellowship Award
  • 财政年份:
    2011
  • 资助国家:
    美国
  • 起止时间:
    2011-09-01 至 2014-08-31
  • 项目状态:
    已结题

项目摘要

Dr. Jonelle Walsh is awarded an NSF Astronomy and Astrophysics Postdoctoral Fellowship to carry out a program of research and education at the University of Texas (UT)-Austin. A major achievement for the field of extragalactic astronomy over the past decade has been the detection of supermassive black holes in the centers of nearby galaxies, and the discovery of correlations between the black hole mass and properties of the host galaxy bulge. About 50 black hole mass measurements have been made to date, most often through the dynamical modeling of stars or nuclear gas disks. While the black hole mass - host galaxy bulge correlations have been clearly established, the determination of the true shape and scatter of the relationships is an evolving process that will continue to change with advances in both observational and modeling techniques.Dr. Walsh proposes to investigate and quantify the biases in both stellar and gas dynamical methods through the re-evaluation of existing measurements, and to make new mass measurements with the aim of addressing uncertainties associated with certain supermassive black hole demographics. She will focus on three projects: (1) determining the biases in previous stellar dynamical black hole mass measurements that neglected to model the dark matter halo's contribution to the gravitational potential, (2) revising gas dynamical black hole mass measurements previously made using the Hubble Space Telescope (HST) Faint Object Spectrograph by acquiring much higher quality data and applying a more comprehensive analysis, and (3) increasing the number of black hole mass measurements at the high-end of the black hole mass - host galaxy bulge relationships. In order to carry out her research, Dr. Walsh will obtain high-resolution observations with integral field spectrographs assisted by adaptive optics and with the HST Space Telescope Imaging Spectrograph. She will also acquire large-scale observations using the unique instrument VIRUS-P on the 2.7m telescope at the McDonald Observatory.Dr. Walsh will also develop an interactive video conference program on black holes specifically aimed at high-school students. The new educational content will be integrated into the existing "Live from McDonald Observatory!" program run by the McDonald Observatory. These live video conferences allow students to take a virtual field trip to the observatory, and include tours of the observatory, hands-on activities that encourage the exploration of a science topic, and science demonstrations. Dr. Walsh will develop pre- and post-conference activities that will focus on the fundamental properties of black holes and the nature of active galactic nuclei. She will participate in the production of the video conference either remotely from UT Austin or through a pre-recorded portion. The materials and activities that she develops for the program will also be available for other UT Austin scientists to bring to high-school classrooms. Last year, the observatory connected with over 150 schools and reached thousands of students. Hispanics and African Americans account for a majority of the enrollment in Texas public schools, and over half of the students in the public school system are classified as economically disadvantaged. Therefore, the video conferences will reach a large number of students from underrepresented groups.
Jonelle Walsh博士被授予美国国家科学基金会天文学和天体物理学博士后奖学金,在德克萨斯大学奥斯汀分校开展研究和教育项目。在过去的十年里,星系外天文学领域的一项重大成就是在邻近星系的中心发现了超大质量黑洞,并发现了黑洞质量与宿主星系凸起特性之间的相关性。迄今为止,人们已经对黑洞质量进行了大约50次测量,其中大多数是通过对恒星或核气体盘的动力学建模进行的。虽然黑洞质量与宿主星系凸起的相关性已经被清楚地建立起来,但确定这种关系的真实形状和分散程度是一个不断发展的过程,将随着观测和建模技术的进步而继续改变。Walsh建议通过对现有测量的重新评估来调查和量化恒星和气体动力学方法中的偏差,并进行新的质量测量,以解决与某些超大质量黑洞人口统计学相关的不确定性。她将专注于三个项目:(1)确定以往恒星动力黑洞质量测量中忽略了对暗物质晕对引力势的贡献进行建模的偏差;(2)通过获得更高质量的数据和应用更全面的分析,修正以前使用哈勃太空望远镜(HST)微弱物体光谱仪进行的气体动力黑洞质量测量;(3)在黑洞质量-宿主星系凸起关系的高端增加黑洞质量测量的数量。为了开展她的研究,沃尔什博士将利用自适应光学辅助的积分场光谱仪和HST空间望远镜成像光谱仪获得高分辨率观测结果。她还将使用麦克唐纳天文台2.7米望远镜上的独特仪器病毒- p进行大规模观测。沃尔什还将开发一个专门针对高中生的黑洞互动视频会议项目。新的教育内容将被整合到麦当劳天文台现有的“现场直播”节目中。这些现场视频会议允许学生进行虚拟的天文台实地考察,包括参观天文台,鼓励探索科学主题的实践活动,以及科学演示。沃尔什博士将开展会前和会后的活动,重点关注黑洞的基本特性和活动星系核的性质。她将从德克萨斯大学奥斯汀分校远程参与视频会议的制作,或者通过预先录制的部分。她为该项目开发的材料和活动也将供德克萨斯大学奥斯汀分校的其他科学家带到高中教室。去年,天文台与150多所学校建立了联系,接触了数千名学生。在德州公立学校,拉美裔和非裔美国人占大多数,公立学校系统中超过一半的学生被归为经济弱势群体。因此,视频会议将接触到来自代表性不足群体的大量学生。

项目成果

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Jonelle Walsh其他文献

Jonelle Walsh的其他文献

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{{ truncateString('Jonelle Walsh', 18)}}的其他基金

Collaborative Research: Advancing Measurements of Supermassive Black Holes with Triaxial Stellar-Dynamical Models
合作研究:利用三轴恒星动力学模型推进超大质量黑洞的测量
  • 批准号:
    2206219
  • 财政年份:
    2022
  • 资助金额:
    $ 8.3万
  • 项目类别:
    Standard Grant
Elucidating the Local Supermassive Black Hole - Galaxy Connection
阐明局域超大质量黑洞 - 星系连接
  • 批准号:
    1814799
  • 财政年份:
    2018
  • 资助金额:
    $ 8.3万
  • 项目类别:
    Continuing Grant

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