In the manuscript, the properties of the proposed intermediate BLR are checked for the mapped AGN PG 0052+251. With the considerations of the apparent effects of the broad He {\sc ii} line on the observed broad H$β$ profile, the line parameters (especially the line width and the line flux) of the observed broad H$α$ and the broad H$β$ are carefully determined. Based on the measured line parameters, the model with two broad components applied for each observed broad balmer line is preferred, and then confirmed by the calculated much different time lags for the inner/intermediate broad components and the corresponding virial BH masses ratio determined by the properties of the inner and the intermediate broad components. Then, the correlation between the broad line width and the broad line flux is checked for the two broad components: one clearly strong negative correlation for the inner broad component, but one positive correlation for the intermediate broad component. The different correlations for the two broad components strongly support the intermediate BLR of PG0052+251.
Standardizing reverberation-mapped H$β$ active galactic nuclei using time-averaged radius$-$luminosity relations with 5100\,Å\,, broad H$β$, and narrow \OIII\ luminosities
AGN environments: is the viewing angle sufficient to explain the difference between broad-line and narrow-line AGN? -- A low-redshift study of close AGN neighbours. Paper I
活动星系核的统一是一个很难测试的模型,因为缺乏对天体内在光度的了解。我们提出了一个测试,我们探测模型的统计调查附近的活动星系核在红移0.03 < z < 0.2的投影距离为350千秒差距,|Δz|活动星系核与邻近星系核之间的距离分别小于0.001,0.006,0.012和0.03。利用斯隆数字巡天第7号数据发布的1658对1型(宽线)活动星系核-星系对和5698对2型活动星系核-星系对的光谱红移,以及一组补充的邻近星系的光度红移对(13519对1型活动星系核-星系对和58743对2型活动星系核-星系对)。AGN宿主星系的形态来自星系动物园项目。我们的研究结果表明,宽线活动星系核和窄线活动星系核存在于非常不同的环境中,在这些环境中,2型活动星系核的邻居比1型活动星系核的邻居更有恒星形成,更蓝。对于Type-2活动星系核,只有在光度红移的邻居中才能检测到颜色依赖性。我们看到,1型/2型邻居2型活动星系核之间的比例稳步下降,在短期的分离与4.5西格玛的统计意义。与1型活动星系核的情况相反,2型活动星系核宿主的形态没有发生变化,这表明2型活动星系核的固有状态是非常短暂的,在随后的合并中不会被保留下来。最后,我们进行了一个假设的光度测试,以调查是否在我们的选择质量偏差可以解释我们的样品中观察到的差异。我们的结论是,活动星系核的统一是一贯不支持的环境中的两种类型的活动星系核,但它们之间的进化联…
A Census of Broad-Line Active Galactic Nuclei in Nearby Galaxies: Coeval Star Formation and Rapid Black Hole Growth
本文首次给出了宽线活动星系核(AGN)频率与邻近(0.01 < z < 0.11)星系的主星系颜色和恒星质量的定量统计图。斯隆数字巡天(SDSS)的孔径测光和z波段浓度测量被用来解开活动星系核和星系发射,从而估计未受污染的星系静止框架颜色,光度和恒星质量。宽线活动星系核在恒星质量一定的情况下,分布在整个蓝色星云和绿色山谷中,在静止(红色序列)星系中更为罕见。这与已发表的较弱窄线活动星系核的宿主星系性质相反,表明宽线活动星系核发生在星系演化的不同阶段。更明亮的宽线活动星系核有更蓝的宿主星系,即使在固定质量下,这表明为核活动提供燃料的过程也有效地形成了恒星。这些数据有利于同时为恒星形成活动和快速超大质量黑洞吸积提供燃料的过程。如果活动星系核对邻近宇宙中的宿主星系产生反馈,那么星系范围内的猝灭的证据必须延迟到活动星系核的宽线阶段之后。
Dynamics of AGN feedback in the X-ray bright East and Southwest arms of M87, mapped by XRISM
SRON, Space Research Organisation Netherlands(荷兰空间研究所);Leiden Observatory, Leiden University(莱顿大学莱顿天文台);Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo(东京大学宇宙物质研究前沿中心);NASA / Goddard Space Flight Center(美国国家航空航天局戈达德太空飞行中心);School of Physics & Astronomy, University of Nottingham(诺丁汉大学物理与天文学学院);Department of Physics, Nagoya University(名古屋大学物理学系);Department of Physics & Astronomy, Waterloo Centre for Astrophysics, University of Waterloo(滑铁卢大学滑铁卢天体物理中心物理与天文学系);Department of Astronomy, University of Geneva(日内瓦大学天文学系);Department of Astronomy, University of Maryland(马里兰大学天文学系);Center for Research and Exploration in Space Science and Technology, NASA / GSFC (CRESST II)(NASA/戈达德太空飞行中心空间科学与技术研究与探索中心);Department of Astronomy and Astrophysics, University of Chicago(芝加哥大学天体物理学系)
Standardizing reverberation-mapped H$α$ and H$β$ active galactic nuclei using radius--luminosity relations involving monochromatic and broad H$α$ luminosities
Standardizing a larger, higher-quality, homogeneous sample of reverberation-mapped H$β$ active galactic nuclei using the broad-line region radius-luminosity relation