Elliptical-like light profiles in infrared images of merging spiral galaxies

Details Elliptical-like light profiles in infrared images of merging spiral galaxies Elliptical-like light profiles in infrared images of merging spiral galaxies

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.344..417w&link_type=abstract

Nature (ISSN 0028-0836), vol. 344, March 29, 1990, p. 417-419.

Physics

97

Infrared Imagery, Light Curve, Spiral Galaxies, Brightness Distribution, Cosmic Dust, Elliptical Galaxies, Mass Distribution, Star Formation

Scientific paper

Theoretical studies indicate that in collisions between disk galaxies, dynamical friction and subsequent relaxation will eventually produce a mass distribution indistinguishable from that of an elliptical galaxy. Schweizer (1982) showed that the V-light profile of the merging galaxy NGC7252 is indeed well fitted by the r exp 1/4 de Vaucouleurs law. K images of six galaxies which are believed to be mergers of disk galaxies have been obtained. Two of the six, NGC2623 and Arp220, appear to obey the r exp 1/4 law to the limits of the images, offering new support for the idea that mergers of spirals can evolve into elliptical-like objects.

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