QSOs as Signposts to Galaxy Evolution: Spectroscopic Clues to Winds, Jets, and Accretion

QSO 作为星系演化的路标：风、喷流和吸积的光谱线索

• 批准号: 0206261
• 负责人: Beverley Wills
• 金额: $ 41.67万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0206261&HistoricalAwards=false
• 关键词: QSOs; Signposts; Galaxy; Evolution; Spectroscopic

AST 0206261Wills, B JFor low redshift quasars, the awardee and others have demonstrated clear relationships between black hole mass, the Eddington ratio, and spectroscopic properties, showing that copious dense, possibly metal- enriched, emission-line gas is present in the QSOs with highest Eddington ratio. The awardee will apply these relationships to QSOs at higher redshifts (1.2 -2.7), to explore the accretion history of the black hole. At these redshifts the important diagnostic lines of hydrogen H B, [OIII], He II ? 4686, and blended Fe II emission are shifted into the 1 um -5 um atmospheric 'windows ', and the UV emission and broad absorption lines shifted into the optical region. This program will involve near-infrared spectroscopy on national facilities as well as at 1 um -1.3 um with the Hobby-Eberly telescope. Existing UV rest-frame spectra will be used, with additional ground-based optical observations where needed (McDonald 2.7m and the HET). A pilot program by the awardee and student has demonstrated the feasibility of these observations, analysis, and interpretation.

AST 0206261Wills, B J 对于低红移类星体，获奖者和其他人已经证明了黑洞质量、爱丁顿比和光谱特性之间的清晰关系，表明在具有最高爱丁顿比的 QSO 中存在大量致密、可能富含金属的发射线气体。获奖者将把这些关系应用于较高红移 (1.2 -2.7) 的 QSO，以探索黑洞的吸积历史。 在这些红移处，氢 H B、[OIII]、He II 的重要诊断线？ 4686和混合Fe II发射被转移到1 um -5 um大气“窗口”中，并且UV发射和宽吸收线被转移到光学区域中。该计划将涉及国家设施的近红外光谱以及霍比-埃伯利望远镜的 1 um -1.3 um 光谱。 将使用现有的紫外静止框架光谱，并在需要时进行额外的地面光学观测（McDonald 2.7m 和 HET）。 获奖者和学生的试点计划证明了这些观察、分析和解释的可行性。