A Dynamical Study of Galaxies in the Hickson Compact Groups
A Dynamical Study of Galaxies in the Hickson Compact Groups
复制标题
希克森紧群星系的动力学研究
DOI：
--
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Y. Taniguchi
中科院分区：
文献类型：
--
作者：
S. Nishiura;Masashi Shimada;Y. Ohyama;T. Murayama;Y. Taniguchi
为了研究希克森紧群（HCGs）中螺旋星系的动力学特性，我们给出了20个HCGs中30个星系的旋转曲线。研究发现：(1)HCG螺旋星系的动力学特性与形态特性之间没有显著的关系。(2) HCG螺旋星系的动力学性质与核活动的频率分布之间没有显著的关系。(3) HCG螺旋星系的动力学性质与任何群性质（即大小、速度色散、星系数密度和穿越时间）均无显著相关。(4)与场旋星系和星系团旋星系相比，HCG旋星系中出现不对称和特殊旋转曲线的频率更高。然而，这种趋势在晚期HCG螺旋星系中更为明显。这些结果表明，HCG螺旋星系的动力学性质与形态、核活动和群性质没有很强的相关性。我们的结果还表明，在hcg中发生的星系碰撞比在野外和星团中发生的更频繁。
To investigate dynamical properties of spiral galaxies in the Hickson compact groups (HCGs), we present rotation curves of 30 galaxies in 20 HCGs. We found as follows: (1) There is no significant relation between dynamical peculiarity and morphological peculiarity in HCG spiral galaxies. (2) There is no significant relation between the dynamical properties and the frequency distribution of nuclear activities in HCG spiral galaxies. (3) There are no significant correlations between the dynamical properties of HCG spiral galaxies and any group properties (i.e., size, velocity dispersion, galaxy number density, and crossing time). (4) Asymmetric and peculiar rotation curves are more frequently seen in the HCG spiral galaxies than in field spiral galaxies or in cluster ones. However, this tendency is more obviously seen in late-type HCG spiral galaxies. These results suggest that the dynamical properties of HCG spiral galaxies do not strongly correlate with the morphology, the nuclear activity, and the group properties. Our results also suggest that more frequent galaxy collisions occur in the HCGs than in the field and in the clusters.