Journal Article

Radial velocity dependence in the spatial orientations of galaxies in and around the local supercluster

B. Aryal, P. R. Kafle and W. Saurer

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 389, issue 2, pages 741-748
Published in print September 2008 | ISSN: 0035-8711
Published online September 2008 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2008.13494.x
Radial velocity dependence in the spatial orientations of galaxies in and around the local supercluster

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We study the radial velocity dependence in the spatial orientations of 10 562 spiral galaxies that have radial velocity <5000 km s−1. The inclination angle and intrinsic flatness of galaxy are used to covert two-dimensional given parameters into three-dimensional spin vectors of the galaxy. We have performed Kolmogorov–Smirnov, Kuiper and Fourier tests in order to examine non-random effects in the expected isotropic distributions. The galaxies that have radial velocities 1500 to 2000 and 3000 to 3500 km s−1 show preferred alignments in both the two- and three-dimensional analysis. The possible explanations of the results will be discussed.

Keywords: galaxies: evolution; galaxies: formation; galaxies: statistics

Journal Article.  5553 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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