天文学进展2017，Vol.35Issue(1)：119-126,8.DOI:10.3969/j.issn.1000-8349.2017.01.07
射电星系3C288中的尘埃环
The AGN-obescuring Torus in Radio Galaxy 3C 288
摘要
Abstract
Radio galaxies are classified as FR Ⅰ or FR Ⅱ sources according to their radio morphology,but separated into high excitation galaxies (HEG) and low excitation galaxies (LEG) according to their spectroscopic properties.So far the origin of FR Ⅰ/FR Ⅱ classilication is not clear.There are different interpretations for the FR dichotomy,such as,the interaction of the jet with the ambient medium or the intrinsic nuclei properties of accretion.Cao and Rawlings (2004) analyzed the optical and radio properties of a sample of 3CR FR Ⅰ radio galaxies and found that the jet power for more than one-third of the sources in the sample is greater than the maximal jet power extraced from a rapid spinning black hole with ADAF accretion disk.They argued that a significant fraction,at least for the high-jet-power sources,of 3CR FR Ⅰ radio galaxies have standard thin discs,but their optical core and broad line regions can be hidden by torus.In order to examine the existence of torus in the high-jet power sources,we carry out photoionization model calculations for the radio galaxy 3C 288 using CLOUDY.We find that the theoretical ionizing luminosity is more than the observed optical core luminosity,as well as the [O Ⅲ] luminosity.We conclude that there is indeed obscuring torus in 3C 288.关键词
活动星系核/射电星系/吸积模式/尘埃环Key words
AGN/radio galaxies/accretion mode/torus分类
天文与地球科学引用本文复制引用
胡京馥,曹新伍,陈亮,游贝..射电星系3C288中的尘埃环[J].天文学进展,2017,35(1):119-126,8.基金项目
国家自然科学基金(11233006) （11233006）
