A Complete Census of Seyferts and Obscured AGN from the Sloan Digital Sky Survey

斯隆数字巡天对 Seyferts 和模糊活动星系核的完整普查

• 批准号: 0307409
• 负责人: Michael Strauss
• 金额: $ 30.84万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-01 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0307409&HistoricalAwards=false
• 关键词: Complete; Census; Seyferts; Obscured; AGN

AST-0307409StraussThis research will carry out a complete census of low-luminosity and unusual Active Galactic Nuclei (AGN), in order to quantify the full populations of these objects and to understand the evolution of super-massive black holes as it relates to the evolution of the galaxies in which they reside. Assembling various catalogs based on the Sloan Digital Sky Survey, the PI will determine the faint end of the AGN luminosity function (which is absolutely crucial for understanding the dramatic change in the observed number density of luminous quasars as a function of redshift), explore the relationships between AGN and their host galaxies and their environment, and quantify the physical nature of obscured and reddened AGN. Astronomers believe that AGN are powered by accretion disks, and quasar emission line profiles are an important probe of accretion physics: this research will also address the puzzle of why only a small subset shows double-peaked emission lines. Furthermore, the PI will study those objects with featureless spectra, and thus test models for AGN unification.The PI will continue his record of engaging students from high school to graduate school in the research, which will also be incorporated into undergraduate and public lectures. His exciting results will be shown at Princeton's student center on their electronic wallpaper, and via the astro-bulletin, a large video display at the Hall of the Universe in the Rose Center for Earth and Space Science (American Museum of Natural History).

AST-0307409施特劳斯这项研究将对低光度和不寻常的活动星系核（AGN）进行全面普查，以量化这些物体的全部人口，并了解超大质量黑洞的演变，因为它与它们所居住的星系的演变有关。 PI将根据斯隆数字巡天收集各种目录，确定活动星系核光度函数的暗端（这对于理解观测到的发光类星体数量密度随红移的急剧变化绝对至关重要），探索活动星系核与其宿主星系及其环境之间的关系，并量化被遮蔽和变红的活动星系核的物理性质。 天文学家认为活动星系核是由吸积盘提供动力的，类星体发射线轮廓是吸积物理学的重要探测器：这项研究还将解决为什么只有一小部分显示双峰发射线的难题。 此外，PI将研究那些没有特征光谱的天体，从而测试活动星系核统一的模型。PI将继续他的记录，吸引从高中到研究生院的学生参与研究，这也将纳入本科生和公共讲座。 他的令人兴奋的结果将在普林斯顿的学生中心的电子壁纸上显示，并通过天文公告，在地球和空间科学玫瑰中心（美国自然历史博物馆）的宇宙大厅的大型视频显示。