Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-05-31
Astronomy and Astrophysics
Astrophysics
13 pages, 2 figures, accepted to be published in A&A
Scientific paper
10.1051/0004-6361:20020895
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 neither is there any correlation with the asymmetry. c) A third anticorrelation arises from 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 up the same dependence.
Battaner Eduardo
Castro-Rodriguez Nieves
Lopez-Corredoira Martin
Sanchez-Saavedra M. L.
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