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Direct confirmation of two pattern speeds in the double-barred galaxy NGC 2950

被引：79
作者：
Corsini, EM
Debattista, VP
Aguerri, JAL
机构：
[1] Univ Padua, Dipartimento Astron, I-35122 Padua, Italy
[2] ETH Honggerberg, Inst Astron, CH-8093 Zurich, Switzerland
[3] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain
来源：
ASTROPHYSICAL JOURNAL | 2003年 / 599卷 / 01期
关键词：
galaxies : elliptical and lenticular; cD; galaxies : individual (NGC 2950); galaxies : kinematics and dynamics; galaxies : photometry; galaxies : structure;
D O I：
10.1086/381080
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the surface photometry and stellar kinematics of NGC 2950, which is a nearby and undisturbed SB0 galaxy hosting two nested stellar bars. We use the Tremaine-Weinberg method to measure the pattern speed of the primary bar. This also permits us to establish directly and for the first time that the two nested bars are rotating with different pattern speeds and, in particular, that the rotation frequency of the secondary bar is higher than that of the primary one.
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页码：L29 / L32
页数：4
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