Doctoral Dissertation Research: International: Fueling of Faint Active Galactic Nuclei: Obscured or Intrinsically Weak

博士论文研究：国际：微弱活跃星系核的燃料：模糊或本质上微弱

• 批准号: 0943995
• 负责人: Christopher Impey
• 金额: $ 1.25万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0943995&HistoricalAwards=false
• 关键词: Doctoral; Dissertation; Research; International; Fueling

This program continues the collaboration between University of Arizona graduate student Jonathan Trump and Ehime University (Japan) Professor Yoshiaki Taniguchi. Their research centers on supermassive black holes (SMBHs), which are found in the centers of all galaxies and are millions to billions of times more massive than our sun. SMBHs in the distant universe are bright because they rapidly accrete nearby stars and gas, while most local SMBHs (such as the one at the center of the Milky Way galaxy) are passive and extremely faint. Trump and the PI have led COSMOS spectroscopy using the US-operated Magellan telescope, while Professor Taniguchi has led the optical photometry using the Japan-operated Subaru telescope. Their previous work has suggested the first evidence for a transition phase between highly accreting distant SMBHs and local passive SMBHs. This program will use the optical photometry to identify more weakly accreting SMBHs that were too faint for spectroscopy, with the goal of connecting the increase in accretion to a change in galaxy evolution and fueling history. The program will also use spectropolarimetry with an instrument available only on the Japan-operated Subaru telescope, looking for signatures of obscuration and hidden fueling in the weakly accreting SMBHs. The broader impacts of the proposed research center on the preparation by the PI of a popular article on the evolution of black holes down to modest mass examples, and the outreach work of Jonathan Trump at Ehime University, where he will coach local graduate students on skills in giving presentations in English and on surveying research literature through the use of journal club activities.

该项目延续了亚利桑那大学研究生Jonathan Trump和爱媛大学（日本）Yoshiaki Taniguchi教授之间的合作。 他们的研究中心是超大质量黑洞（SMBH），它们存在于所有星系的中心，比我们的太阳大数百万到数十亿倍。 遥远宇宙中的SMBH是明亮的，因为它们快速地吸积附近的恒星和气体，而大多数本地SMBH（如银河系中心的SMBH）是被动的，非常微弱。 特朗普和PI使用美国操作的麦哲伦望远镜领导了COSMOS光谱学，而谷口教授使用日本操作的斯巴鲁望远镜领导了光学光度学。 他们先前的工作提出了第一个证据，证明在高度吸积的遥远SMBH和本地被动SMBH之间存在过渡阶段。 该计划将使用光学测光来识别更弱的吸积SMBH，这些SMBH对于光谱学来说太微弱了，目的是将吸积的增加与星系演化和燃料历史的变化联系起来。 该计划还将使用分光偏振法，该仪器仅在日本运营的斯巴鲁望远镜上可用，寻找弱吸积SMBH中的遮蔽和隐藏燃料的特征。拟议的研究中心对PI编写一篇关于黑洞演化到中等质量例子的流行文章的更广泛影响，以及爱媛大学Jonathan Trump的外联工作，在那里他将指导当地研究生用英语进行演讲的技巧，并通过使用期刊俱乐部活动调查研究文献。