Asymmetries in disk galaxies. How often? How strong?

Details Asymmetries in disk galaxies. How often? How strong? Asymmetries in disk galaxies. How often? How strong?

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...290l...9r&link_type=abstract

Astronomy and Astrophysics 290L, L9-L12 (1994)

Astronomy and Astrophysics

Astrophysics

144

Galaxies: General, Galaxies: Spiral, Hi Data

Scientific paper

Asymmetries in the distributions of light and neutral hydrogen are often observed in disk galaxies. But how common are they? It is possible to estimate their number? Lopsided HI distributions and kinematics usually result in an asymmetry of the global HI profile. We have used the frequency of asymmetries in the 21 cm line profiles from several single-dish surveys to derive a lower limit of 50% for the fraction of galaxies with non-circularities. Asymmetries in disk galaxies may, therefore, be the rule rather than the exception.

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