Do external regions of galaxies have a common orientation?

Details Do external regions of galaxies have a common orientation? Do external regions of galaxies have a common orientation?

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...233..317f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 233, no. 2, July 1990, p. 317-324.

Astronomy and Astrophysics

Astronomy

7

Galactic Structure, H I Regions, Radio Astronomy, Anisotropy, Astronomical Models, Galactic Clusters, Galactic Evolution, Quasars

Scientific paper

The position angles of extended H I regions of galaxies are analyzed. It is found that, contrary to the position angles estimated from the optical regions of galaxies which show a marginal now random effect, the extended H I regions are not distributed at random. The analysis reveals a dipole anisotropy toward the direction about (5 h 30 min, + 10 deg). The existence of this dipole does not seem to be explained only by the flattened structure of the Supercluster. Any realistic model of galaxy formation should be able to take this phenomenon into account.

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