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What Determines The Bulge to Disk Ratio of Galaxies

Published online by Cambridge University Press:  12 April 2016

Nico Roos
Nico Roos*
Affiliation:
Sterrewacht Leiden, Leiden, the Netherlands

Abstract

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Galaxies having the same luminosity may have very different bulge to disk ratios, while the mean bulge to disk ratio slowly increases with total luminosity (Schechter and Dressier, 1987, Sandage et al., 1985). Such a behaviour is expected if ellipticals and the spheroidal components of disk galaxies are produced by secondary accretion of galaxies by larger galaxies. This is illustrated using a simple toy model of the evolution of the mass function of galaxies due to galaxy mergers.

Type
VII. Classical Theory of Pairs
Information
International Astronomical Union Colloquium , Volume 124: Paired and Interacting Galaxies , 1990 , pp. 601 - 606
Copyright
Copyright © NASA 1990

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