The transition from galaxy-wide gas inflow to outflow in quasar host galaxies  

作　　者：Zhicheng He Zhifu Chen Guilin Liu Tinggui Wang Luis CHo Junxian Wang Weihao Bian Zheng Cai Guobin Mou Qiusheng Gu Zhiwen Wang 

机构地区：[1]CAS Key Laboratory for Research in Galaxies and Cosmology,Department of Astronomy,University of Science and Technology of China,Hefei,230026,China [2]Department of Physics,Guangxi Minzu University,Nanning,530006,China [3]Kavli Institute for Astronomy and Astrophysics,Peking University,Beijing,100871,China [4]School of Physics,Nanjing Normal University,Nanjing,210046,China [5]Department of Astronomy,Tsinghua University,Beijing,100084,China [6]School of Astronomy and Space Science,Nanjing University,Nanjing,210093,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2024年第12期183-196,共14页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.12222304,12192220,and 12192221);supported by the Guangxi Natural Science Foundation (Grant No.2024GXNSFDA010069);the National Natural Science Foundation of China (Grant No.12073007);the Scientific Research Project of Guangxi University for Nationalities (Grant No.2018KJQD01);the research grants from the China Manned Space Project (Grant Nos.CMSCSST-2021-A06,and CMSCSST-2021-A07);the National Natural Science Foundation of China (Grant No.11421303);the Fundamental Research Funds for the Central Universities (Grant No.WK3440000005);the K.C.Wong Education Foundation;supported by the National Science Foundation of China (Grant Nos.11721303,11991052,12011540375,and 12233001);the National Key R&D Program of China (Grant No.2022YFF0503401);the China Manned Space Project (Grant Nos.CMS-CSST-2021-A04,and CMS-CSST-2021-A06);supported by the National Science Foundation of China (Grant No.12033006);provided by the Alfred P.Sloan Foundation;the U.S.Department of Energy Office of Science,and the Participating Institutions;support and resources from the Center for High Performance Computing at the University of Utah。

摘　　要：Galactic-scale outflows driven by active galactic nuclei(AGNs) represent a commonly invoked feedback mechanism within galaxy evolution models.However,the interactions among interstellar gas on galactic scales,the propagation of AGN outflows,and the fundamental parameters of AGNs during their evolutionary processes remain poorly understood.Notably,powerful nuclear outflows are typically associated with the early stages of AGN activity,which are characterized by high accretion rates and weak narrow emission lines.In our analysis of a sample of quasars hosting Mg ii narrow absorption lines(NALs) obtained from the Sloan Digital Sky Survey,we identify a previously unobserved phenomenon wherein galaxy-scale inflow transitions to outflow dominance,concurrent with a notable increase in the strength of the narrow [O Ⅲ] line,achieving a confidence level of 6.7σ.This indicates that while nuclear outflows diminish,galaxy-wide outflows intensify as AGNs evolve.These findings suggest that early-stage outflows interact with the interstellar medium on a galactic scale,thereby facilitating a gradual transition to galaxy-wide outflows.This provides observational support for the hypothetical multi-stage propagation of AGN outflows that globally regulates galaxy evolution.

关 键 词：active galactic nuclei QUASAR galaxy winds galaxy evolution FEEDBACK 

分 类 号：P158[天文地球—天文学]