``Cut-off '' radii of disk galaxies in relation to their formation and evolution

Details ``Cut-off '' radii of disk galaxies in relation to their formation and evolution ``Cut-off '' radii of disk galaxies in relation to their formation and evolution

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998egdg.conf..133p&link_type=abstract

"Dynamics of Galaxies and Galactic Nuclei, An International Workshop of the SFB 328 "Evolution of Galaxies" held at the ITA Nove

Computer Science

Scientific paper

Observing global structural parameters of disk galaxies becomes inceasingly significant for comparisons with theories and numerical simulations of galaxy formation and evolution. We present here the results of a CCD survey of 70 edge-on disk galaxies concerning their disk-scalelength h and cut-off radius Rco. We find a significantly lower mean value of frac{Rco}{h} = 3.3 compared to the standard value of 4.3 by van der Kruit et al. (1982). Our data show a relation of these values in linear scale. A possible explanation is, that large disks with regard to their scalelength are short in terms of cut-off radius.

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