Warps and correlations with intrinsic parameters of galaxies in the visible and radio

被引:19
作者
Castro-Rodríguez, N
López-Corredoira, M
Sánchez-Saavedra, MLS
Battaner, E
机构
[1] Univ Basel, Astron Inst, Binningen, Switzerland
[2] Univ Granada, Dept Fis Teor & Cosmos, Granada 18002, Spain
[3] Inst Astrofis Canarias, San Cristobal la Laguna 38205, Spain
关键词
galaxies : statistics; galaxies : spiral; galaxies : structure; galaxies : kinematics and dynamics;
D O I
10.1051/0004-6361:20020895
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
From a comparison of the different parameters of warped galaxies in the radio, and especially in the visible, we find that: a) No large galaxy (large mass or radius) has been found to have high amplitude in the warp, and there is no correlation of size/mass with the degree of asymmetry of the warp. b) The disc density and the ratio of dark to luminous mass show an opposing trend: smaller values give more asymmetric warps in the inner radii (optical warps) but show no correlation with the amplitude of the warp; however, in the external radii is there no correlation with asymmetry. c) A third anticorrelation appears in a comparison of the amplitude and degree of asymmetry in the warped galaxies. Hence, it seems that very massive dark matter haloes have nothing to do with the formation of warps but only with the degree of symmetry in the inner radii, and are unrelated to the warp shape for the outermost radii. Denser discs show the same dependence.
引用
收藏
页码:519 / 530
页数:12
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