Spectroscopy of QSOs (Astronomy)

QSO 的光谱学（天文学）

• 批准号: 8800660
• 负责人: Jill Bechtold
• 金额: $ 9.35万
• 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: 1989
• 资助国家: 美国
• 起止时间: 1989-01-01 至 1991-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8800660&HistoricalAwards=false
• 关键词: Spectroscopy; QSOs; Astronomy

Several questions in two broad observational areas will be addressed: (1) the intrinsic line and continuum properties of QSOs, and (2) the physical properties of the QSO absorption line systems which arise in intervening material. The goal of the work in the first area is to gain a better understanding of the continuum energy production processes in QSOs, through observation of the spectral energy distributions of a large number of objects from the X-ray to the far IR, and modeling of the accretion disk and nonthermal components. Further clues to the nature of the continuum production regions are given by monitoring the variability of mildly variable objects, to see which spectral components vary together, and which vary separately. The goal of the work in the second area is to understand the physical conditions and origins of the clouds which give rise to the QSO absorption lines, by obtaining very high resolution spectra of high redshift QSOs. The types of systems to be studied include the Lyman or forest lines, which may arise in primordial or protogalactic gas clouds, the metal line systems which probably arise in the halos or disks of galaxies, and the very thick damped Lyman or systems, which probably arise in galaxy disks. Interactive activities include teaching a special topics course in astronomy, giving guest lectures in introductory astronomy courses, participating in the University honors program, joining the colloquium committee to bring women speakers to the University, and giving public lectures at the University planetarium. This project furthers VPW program objectives which are (1) to provide opportunities for women to advance their careers in engineering and in the disciplines of science supported by NSF and (2) to encourage women to pursue careers in science and engineering by providing greater visibility for women scientists and engineers employed in industry, government, and academic institutions. By encouraging the participation of women in science, it is a valuable investment in the Nation's future scientific vitality.

将在两个广泛的观察领域中提出几个问题， 解决：（1）的内在线和连续属性的 类星体吸收线的物理性质 在介入材料中产生的系统。 的目标 第一个领域的工作是更好地了解 类星体的连续能量产生过程， 观测到的光谱能量分布的大 从X射线到远红外的物体数量，以及 吸积盘和非热成分。 更多线索 连续统产生区域的性质由下式给出： 监测轻度可变对象的可变性， 哪些光谱成分一起变化，哪些变化 分开 第二个领域的工作目标是 了解云的物理条件和起源 这引起了类星体的吸收线，通过获得非常 高红移类星体的高分辨率光谱。 的类型 要研究的系统包括莱曼或森林线， 可能产生于原始或原星系的气体云， 线系统，可能出现在晕或磁盘的 星系，以及非常厚的阻尼莱曼或系统， 可能起源于星系盘。 互动活动包括教授一个特别的主题 天文学课程，在介绍性的客座讲座 天文学课程，参加大学荣誉 方案，加入座谈会委员会，使妇女发言者 到大学，并在大学进行公开讲座 天文馆 本项目进一步促进了VPW计划的目标，即（1） 为妇女提供机会， 工程和科学的学科由NSF支持 （2）鼓励妇女从事科学事业， 通过提高女科学家的知名度， 以及受雇于工业、政府和学术界的工程师 机构职能体系 通过鼓励妇女参与 这是对国家未来的宝贵投资。 科学生命力