天文学进展2017，Vol.35Issue(1)：35-53,19.DOI:10.3969/j.issn.1000-8349.2017.01.03
近邻活动星系核的燃料供给机制——空间可分辨观测的研究进展
The Feeding Mechanisms of Nearby Active Galactic Nuclei: An Overview of the Spatially Resolved Observations
摘要
Abstract
Active galactic nuclei (AGN) are galaxies that have very energetic central regions,which can present several observational signatures such as high luminosity,compact size,variability and strong emission lines.Studying the feeding processes of AGN can help us to understand the accretion and mass growth of the supper massive blackholes (SMBHs),and the co-evolution between the SMBHs and their host galaxies.In this paper,we review the spatially-resolved observational studies of the AGN feeding processes in recent twenty years.First,we briefly discuss the key problems in the feeding processes of AGN,including:(1) How much fuel does the nuclear activity need? (2) What is the origin of the fuel? (3) How does the fuel efficiently lose its angular momentum? (4) How can the star formation processes in the nuclear or circumnuclear region affect the nuclear activity? Secondly,we introduce and discuss the recent observational results of the nearby AGN,including:the observations of HST imaging,the observations of optical and near-infrared integral field spectroscopy,and the observations of cold gas in the central regions of these galaxies.These observational studies suggest that the non-asymmetric structures (such as large-scale bars,nuclear bars within bars,nuclear spirals within bars,nuclear ovals within bars,etc.) in galaxies can dissipate the angular momentum of gas and drive it into the central regions,which may play an important role in the feeding AGN.Finally,we summarize the results and prospect for the future studies.关键词
活动星系核/燃料供给机制/内流Key words
active galactic nuclei/feeding mechanisms/inflows分类
天文与地球科学引用本文复制引用
罗荣欣,郝蕾..近邻活动星系核的燃料供给机制——空间可分辨观测的研究进展[J].天文学进展,2017,35(1):35-53,19.基金项目
国家自然科学基金(11473305) （11473305）
中国科学院战略性先导专项B类(XDB09030200) （XDB09030200）
