QUASAR ABSORPTION OUTFLOWS, THE MAIN AGENT OF AGN FEEDBACK

类星体吸收流出，活动星系核反馈的主要媒介

• 批准号: 2106249
• 负责人: Nahum Arav
• 金额: $ 50万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2106249&HistoricalAwards=false
• 关键词: QUASAR; ABSORPTION; OUTFLOWS; MAIN; AGENT

The role of quasars (the most energetic objects in the universe) in the formation of galaxies is a key issue in understanding how our universe evolves. The PI's program will measure the influence of powerful outflows, emanating from these quasars, on the formation and evolution of their host galaxy. This project will involve interdisciplinary research opportunities that will significantly contribute to undergraduate education. Over the last 10 years, this group has employed 21 students for a semester or longer, half of them women and under-represented minorities. Quasar outflows are invoked as the agents for quasar-mode Active Galactic Nuclei (AGN) feedback. Such outflows come in many flavors: molecular, atomic, ionized seen in emission, ionized seen in absorption, and ionized seen in X-ray spectra. The most energetic outflows are ionized outflows seen in UV absorption spectra. Absorption outflows are the main candidates for producing AGN feedback effects. The team’s research project will expand on the progress they have made previously and will add to the understanding of the physics and origin of absorption outflows and their role in galaxy evolution.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

类星体（宇宙中能量最大的物体）在星系形成中的作用是理解宇宙如何演化的关键问题。PI的计划将测量从这些类星体发出的强大外流对其宿主星系的形成和演化的影响。该项目将涉及跨学科的研究机会，这将大大有助于本科教育。在过去10年中，该团体雇用了21名学生，为期一个学期或更长时间，其中一半是妇女和代表性不足的少数民族。类星体外流被调用作为类星体模式活动星系核（AGN）反馈的代理。这样的流出有很多种形式：分子的、原子的、在发射中看到的电离的、在吸收中看到的电离的和在X射线光谱中看到的电离的。在紫外吸收光谱中，能量最大的流出是电离流出。吸收外流是产生活动星系核反馈效应的主要候选者。该团队的研究项目将扩大他们以前取得的进展，并将增加对吸收流出的物理和起源及其在星系演化中的作用的理解。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

The Farthest Quasar Mini-Broad Absorption Line Outflow from Its Central Source: Very Large Telescope/UVES Observation of SDSS J0242+0049

• DOI: 10.3847/1538-4357/ac503d
• 发表时间: 2022-02
• 期刊: The Astrophysical Journal
• 作者: D. Byun;N. Arav;P. Hall

VLT/UVES observation of the outflow in quasar SDSS J1439-0106

类星体流出的 VLT/UVES 观测 SDSS J1439-0106

• DOI: 10.1093/mnras/stac2194
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Byun, Doyee;Arav, Nahum;Walker, Andrew
• 通讯作者: Walker, Andrew

VLT/UVES observation of the SDSS J2357−0048 outflow

SDSS J2357–0048 流出的 VLT/UVES 观察

• DOI: 10.1093/mnras/stac2638
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Byun, Doyee;Arav, Nahum;Hall, Patrick B.
• 通讯作者: Hall, Patrick B.