Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...295...73k&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 295, Aug. 1, 1985, p. 73-79. Research supported by the Einstein Center.
Astronomy and Astrophysics
Astrophysics
421
Disk Galaxies, Dwarf Galaxies, Elliptical Galaxies, Galactic Structure, Globular Clusters, Stellar Systems, Astronomical Photometry, Brightness, Galactic Nuclei
Scientific paper
Core radii and central surface brightnesses of bulges and elliptical galaxies are measured using CCD photometry obtained with the CFH Telescope. The correlations between core parameters are derived and compared for ellipticals, bulges, dwarf spheroidal galaxies, dwarf irregular galaxies, and globular clusters. The data confirm the existence of well-defined correlations between the core parameters of elliptical galaxies. The bulges of disk galaxies are basically similar to elliptical galaxies. Ordinary and dwarf elliptical galaxies do not form a continuous sequence. Rather, bulges and ellipticals, dwarf spheroidals, and globular clusters appear to be three very distinct kinds of stellar systems. Dwarf spheroidal galaxies are most closely related to dwarf irregular galaxies and may have evolved from them.
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