Departures from axisymmetric morphology and dynamics in spiral galaxies

被引:42
作者
Kornreich, DA
Haynes, MP
Lovelace, RVE
van Zee, L
机构
[1] Cornell Univ, Ctr Radiophys & Space Res, Ithaca, NY 14853 USA
[2] Cornell Univ, Natl Astron & Ionosphere Ctr, Ithaca, NY 14853 USA
[3] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA
[4] Natl Radio Astron Observ, Socorro, NM 87801 USA
基金
美国国家科学基金会;
关键词
galaxies : kinematics and dynamics; galaxies : structure; methods : observational;
D O I
10.1086/301422
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
New H I synthesis data have been obtained for six face-on galaxies with the Very Large Array. These data and reanalyses of three additional data sets make up a sample of nine face-on galaxies analyzed for deviations from axisymmetry in morphology and dynamics. This sample represents a subsample of galaxies already analyzed for morphological symmetry properties in the R band. Four quantitative measures of dynamical nonaxisymmetry are compared with one another and to the quantitative measures of morphological asymmetry in H I and the R band to investigate the relationships between nonaxisymmetric morphology and dynamics. We find no significant relationship between asymmetric morphology and most of the dynamical measures in our sample. A possible relationship is found, however, between morphology and dynamical position angle differences between approaching and receding sides of the galaxy.
引用
收藏
页码:139 / 164
页数:26
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