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Asymmetry in Isolated, Morphologically Normal Sa Galaxies

机译:孤立的形态正常的Sa星系中的不对称性

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We have examined the morphological and dynamical H I symmetry properties of a sample of moderately inclined Sa galaxies classified as morphologically normal. The sample galaxies were known a priori to exhibit kinematic peculiarities ranging from warps to independent, wholly decoupled disks and are possibly the remnants of minor mergers. We compare the asymmetry of the rotation curves to global kinematic asymmetry and find a relationship between rotation curve asymmetry and the kinematic n = 2 mode. We have also examined the kinematics of these galaxies following the discussion of Briggs and find that the warps observed in the H I disks of these galaxies deviate significantly from the simple rules for warps that commonly apply.
机译:我们已经检查了中度倾斜的Sa星系样本的形态和动力学H I对称性,这些星系被分类为形态正常。先验已知样本星系具有从扭曲到独立的,完全解耦的磁盘的运动学特征,并且可能是次要合并的残余。我们将旋转曲线的不对称性与整体运动学的不对称性进行比较,并找到旋转曲线的不对称性与运动学的n = 2模式之间的关系。在讨论了布里格斯之后,我们还研究了这些星系的运动学,发现在这些星系的H I圆盘中观察到的经线明显不同于通常适用的经线简单规则。

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