The Orientation of Spin Vectors of Galaxies in the Ursa Major Filament

Details The Orientation of Spin Vectors of Galaxies in the Ursa Major Filament The Orientation of Spin Vectors of Galaxies in the Ursa Major Filament

1994-08-06

arxiv.org/abs/astro-ph/9408022v1

Astronomy and Astrophysics

Astrophysics

20 pages, 4 figures, request PostScript file to cheongho@payne.mps.ohio-state.edu, OSU-TA-14/94

Scientific paper

10.1086/175671

Spin vectors of 60 galaxies in the ``Ursa Major Filament'' are obtained from CCD images and spectroscopic determinations of the directions of rotation. These data are used to remove the four-fold degeneracy introduced by the project ed images of galaxies, making possible the complete reconstruction of the galaxy spin vectors. Several possible organizations of spin vectors are investigated by means of statistical analyses of the three-dimensional spin vector maps. The results indicate that there exists no significant alignment of galaxy spin vectors with respect to the supergalactic plane, the supergalactic axis, or the cylindrical axis of the filament itself. No tendency for linear alignment of spin vectors towards any specific direction was detected. We also obtain a statistically negative result for azimuthal, radial, and circul ar-helical orientation of spin vectors.

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