Declining rotation curves in interacting galaxies

Details Declining rotation curves in interacting galaxies Declining rotation curves in interacting galaxies

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993egte.conf..251d&link_type=abstract

In NASA. Ames Research Center, The Evolution of Galaxies and Their Environment p 251-252 (SEE N93-26706 10-90)

Astronomy and Astrophysics

Astronomy

1

Astronomical Photometry, Galactic Evolution, Interacting Galaxies, Photometry, Spiral Galaxies, Brightness, Rotation

Scientific paper

A declining rotation curve was recently found for the galaxy NGC 3521 by HI synthesis telescope observations (Casertano and van Gorkom 1991). From a comparison of the shapes of rotation curves for a larger sample of galaxies Casertano and van Gorkom argue that this is due to initial properties during the phase of galaxy formation. In several studies of global properties of galaxies, NGC 3521 was always considered a 'normal' unbarred, non-interacting, isolated spiral. However, we present CCD surface photometry that shows at low surface brightness levels the typical signs of interaction or even merging.

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