Nuclear-to-Outer Rotation Curves of Galaxies in the CO and HI Lines
Nuclear-to-Outer Rotation Curves of Galaxies in the CO and HI Lines
复制标题
CO 和 HI 线中星系的核外自转曲线
DOI：
--
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Y. Sofue
中科院分区：
文献类型：
--
作者：
Y. Sofue
我们得到了附近星系的自转曲线，这是几乎完全采样从内到外的区域。我们使用高分辨率的位置-速度图中的CO线沿着长轴的内部区域，和HI线数据的外部区域。我们结合CO和HI数据，得到从核到外区的总旋转曲线。旋转曲线显示了一个陡峭的核内的半径小于CO线观测的分辨率上升，表明一个紧凑的大规模集中在核附近。我们表明，核陡峭的上升是一般和普遍的，和刚体一样的温和的上升是例外。
关键词：Galerkin：运动学-Galerkin：旋转-Galerkin：结构-Galerkin：一般- ISM：CO排放- ISM：HI气体
We have derived rotation curves of nearby galaxies, which are almost completely sampled from the inner to outer regions. We used high-resolution position-velocity diagrams in the CO line along the major axes for the inner regions, and HI-line data for the outer regions. We combined the CO and HI data to obtain total rotation curves from the nuclear to outer regions. The rotation curves show a steep nuclear rise within a radius smaller than the resolutions of CO-line observations, indicating a compact massive concentration near the nucleus. We show that the nuclear steep rise is general and universal, and a rigid body-like gentle rise is exceptional.
Keywords: Galaxies: kinematics - Galaxies: rotation - Galaxies: structure - Galaxies: general - ISM: CO emission - ISM: HI gas