Lopsidedness in WHISP galaxies

Details Lopsidedness in WHISP galaxies Lopsidedness in WHISP galaxies

2010-11-25

arxiv.org/abs/1011.5624v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

conference proceedings of JENAM 2010 meeting "Environment and the Formation of Galaxies: 30 years later", to appear in Astroph

Scientific paper

Observations of the stellar and gaseous components in disc galaxies often reveal asymmetries in the morphological and kinematic distribution. However, the origin of this effect is not well known to date, and quantitative studies are rare. Here, we present the first statistical investigation of a sample of 76 HI discs using the WHISP survey. We perform a Fourier analysis to study the morphological lopsidedness. This allows to trace the degree of asymmetry with radius. We further investigate the dependence on, e.g., the morphological type and the environment.

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