Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-03-29
Astronomy and Astrophysics
Astrophysics
22 pages, 7 figures, Accepted for Publication in Astronomical Journal
Scientific paper
10.1086/300935
We use HI observations made with the upgraded Arecibo 305M Telescope in August 1998 to obtain accurate spin vector determinations for 54 nearly edge-on galaxies in the Minnesota Automated Plate Scanner Pisces-Perseus Survey (MAPS-PP). We introduce a simple observational technique of determining the sense of rotation for galaxies, even when their HI disks are not fully resolved. We examined the spin vector distribution of these 54 galaxies for evidence of preferential galaxy alignments. We use the Kuiper statistic, a variant of the Kolmogorov--Smirnov statistic, to determine the significance of any anisotropies in the distribution of galaxy spin vectors. The possibility of ``spin vector domains'' is also investigated. We find no significant evidence of preferential galaxy alignments in this sample. However, we show tha t the small sample size places weak limits on the level of galaxy alignments.
Cabanela Juan E.
Dickey John M.
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