Statistics of galaxy orientations - Morphology and large-scale structure

Details Statistics of galaxy orientations - Morphology and large-scale structure Statistics of galaxy orientations - Morphology and large-scale structure

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95..975l&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 95, April 1988, p. 975-984. NSF-NASA-CONICET-supported research.

Astronomy and Astrophysics

Astronomy

31

Elliptical Galaxies, Galactic Structure, Spiral Galaxies, Statistical Analysis

Scientific paper

Using the Uppsala General Catalog of bright galaxies and the northern and southern maps of the Lick counts of galaxies, the authors find statistical evidence of a morphology-orientation effect. Major axes of elliptical galaxies are preferentially oriented along the large-scale features of the Lick maps. However, the orientations of the major axes of spiral and lenticular galaxies show no clear signs of significant nonrandom behavior at a level ⪉ one-fifth of the effect seen for ellipticals. The angular scale of the detected alignment effect for Uppsala ellipticals extends to at least θ ≡ 2°, which at a redshift of z ≡ 0.02 corresponds to a linear scale of ≡2h-1Mpc.

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