Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...265..632k&link_type=abstract
Astrophysical Journal, Part 1, vol. 265, Feb. 15, 1983, p. 632-642.
Astronomy and Astrophysics
Astrophysics
77
Disk Galaxies, Galactic Bulge, Galactic Evolution, Galactic Structure, Elliptical Galaxies, Luminosity, Tables (Data), Velocity Distribution
Scientific paper
The observed correlation between galaxy bulge luminosities and central velocity dispersions is examined, with emphasis on the use of accurate bulge-to-disk ratios. Bulges are chosen whose stellar populations resemble those in elliptical galaxies, and the possible differences between bulges in barred and unbarred galaxies are explored together with the effects on the adopted distances of a Virgocentric flow field. Study results extend the conclusions of recent studies which note that some bulges have lower central dispersions than ellipticals of similar luminosity. It is inferred that the central dynamics and stellar content of bulges and ellipticals are similar, although the global dynamics differ in that rotation is more important in bulges than in bright ellipticals.
Illingworth Garth
Kormendy John
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