Kinematically lopsided spiral galaxies

被引：116

作者：

Swaters, RA ^{[1
]}

Schoenmakers, RHM ^{[1
]}

Sancisi, R ^{[1
]}

van Albada, TS ^{[1
]}

机构：

[1] Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1999年 / 304卷 / 02期

关键词：

galaxies : individual : DDO 9; galaxies : individual : NGC 4395; galaxies : kinematics and dynamics; galaxies : spiral; galaxies : structure;

D O I：

10.1046/j.1365-8711.1999.02332.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Asymmetries in the distribution of light and neutral hydrogen are often observed in spiral galaxies, Here, attention is drawn to the presence of large-scale asymmetries in their kinematics. Two examples of kinematically lopsided galaxies are presented and discussed. The shape of the rotation curve - rising more steeply on one side of the galaxy than on the other - is the signature of the kinematic lopsidedness. It is shown that kinematic lopsidedness may be related to lopsidedness in the potential, and that even a mild perturbation in the latter can produce significant kinematic effects. Probably at least half of all spiral galaxies are lopsided.

引用

页码：330 / 334

页数：5