Quasars Probing Quasars

类星体 探测类星体

• 批准号: 1010004
• 负责人: Jason Prochaska
• 金额: $ 48.4万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-08-15 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1010004&HistoricalAwards=false
• 关键词: Quasars; Probing

The purpose of this project is to research problems on the intergalactic medium (IGM), quasar evolution, and galaxy formation by analyzing the spectra of close quasar pairs. The existing dataset, comprised of over 100 pairs, enables a wide range of exploration in this grant period, including 1) Investigating the thermal history of the IGM at redshifts of 2 to 3; 2) Providing the first robust measure of the transverse proximity effect on scales of a few hundred kpc to several Mpc; and 3) Studying the physical state of the halo interstellar medium in the massive, high-redshift galaxies that host luminous quasars. The program will assess the chemical abundances, ionization state, density, and kinematics of the gas at impact parameters of tens to hundreds of kpc from bright, redshift 2 to 4 quasars. These observations will inform the processes of massive galaxy formation and the nature of quasar feedback at high redshift.Broader impacts of the work include training of undergraduate students recruited from a Hispanic Serving Institution, graduate students, and a postdoc, and public outreach activities.

该项目的目的是通过分析紧密的类星体对的光谱来研究播层培养基（IGM），类星体进化和星系形成的问题。 现有的数据集由100多对组成，可以在本赠款期间进行广泛的探索，包括1）调查红移2至3的IgM的热史； 2）提供对几百kpc对几百个MPC尺度的横向接近效应的第一个强大度量； 3）研究托有发光类星体的巨大的高红移星系中的光环星际介质的物理状态。 该程序将评估从明亮的红移2到4个类星体的数十至数百个KPC的气体的化学丰度，电离状态，密度和运动学。这些观察结果将为大型星系形成的过程和高红移反馈的性质提供信息。该作品的影响力的影响包括培训从西班牙裔服务机构，研究生，研究生和公共外展活动的本科生培训。