Seyfert和不活动宿主星系的中心千秒差距：二维恒星和气态动能的比较
The Central Kiloparsec of Seyfert and Inactive Host Galaxies: a Comparison of Two-Dimensional Stellar and Gaseous Kinematics
摘要：
我们调查的二维分布和运动学的电离气体和恒星的中心千秒差距附近的活动（塞弗特）和不活动的星系的匹配样本的属性，使用SAURON积分场单元的威廉赫歇尔望远镜。电离气体的分布显示了一系列的低激发区域，如恒星形成环的Seyferts和不活跃的星系，和高激发区域相关的光电离活动星系核。样本中所有星系的恒星运动学都显示出典型的盘状系统的规则旋转模式，其运动学轴与来自外部测光的运动学轴对齐，并提供了银河系节点线的可靠表示。在去除了活动星系核驱动的外流等非引力成分后，塞弗特星系和不活跃星系中的电离气体运动学也主要由大多数星系中恒星和气体之间的旋转和全球对准所主导。这一结果与以前的光度研究结果一致，即Seyfert宿主的大尺度光分布与非活动宿主相似。然而，充分利用我们的光谱数据的二维性质，从轴对称旋转的气体速度场的偏差被确定，这表明气体运动学在小半径的塞弗特星系相比，不活跃的星系，提供了一个试探性的核气体流和核活动之间的联系。
英文摘要：
We investigate the properties of the two-dimensional distribution and kinematics of ionised gas and stars in the central kiloparsecs of a matched sample of nearby active (Seyfert) and inactive galaxies, using the SAURON Integral Field Unit on the William Herschel Telescope. The ionised gas distributions show a range of low excitation regions such as star formation rings in Seyferts and inactive galaxies, and high excitation regions related to photoionisation by the AGN. The stellar kinematics of all galaxies in the sample show regular rotation patterns typical of disc-like systems, with kinematic axes which are well aligned with those derived from the outer photometry and which provide a reliable representation of the galactic line of nodes. After removal of the non-gravitational components due to e.g. AGN-driven outflows, the ionised gas kinematics in both the Seyfert and inactive galaxies are also dominated by rotation with global alignment between stars and gas in most galaxies. This result is consistent with previous findings from photometric studies that the large-scale light distribution of Seyfert hosts are similar to inactive hosts. However, fully exploiting the two-dimensional nature of our spectroscopic data, deviations from axisymmetric rotation in the gaseous velocity fields are identified that suggest the gaseous kinematics are more disturbed at small radii in the Seyfert galaxies compared with the inactive galaxies, providing a tentative link between nuclear gaseous streaming and nuclear activity.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
