Mon. Not. R. Astron. Soc., 360, 125-132 (2005/June-2)
Spin vector orientation of galaxies in the region 15h48m≤α(2000) ≤ 19h28m, -68°≤δ(2000) ≤-62°.
ARYAL B. and SAURER W.
Abstract (from CDS):
We present an analysis of the orientations of 1433 galaxies found in the region 15h48m≤α(2000) ≤ 19h28m, -68°≤δ(2000) ≤-62°. In this region we investigated three Abell clusters (S0794, S0797, S0805) of richness Class 0 and the Triangulum Australis cluster. Our aim is to examine non-random effects in galaxy orientations in clusters. In addition, we classified the investigated galaxies into subsamples on the basis of their axial ratio, major diameter and morphology. The spin vector orientations of total galaxies in the investigated region is found to be random. No preferred orientation is found in the clusters. We could not note any morphological dependence of the galaxy orientations in our samples. No preferred orientations can be seen for the spiral galaxies. The morphologically unidentified galaxies, galaxies having major diameters of <47 arcsec, and the nearly edge-on galaxies (b/a < 0.5, 0.4 < b/a≤ 0.5) show anisotropy: spin vectors of galaxies tend to be oriented perpendicular to the Local Supercluster plane and spin vector projections tend to point radially with respect to the Virgo cluster centre.