On the lack of a simple relation between RE and mu-e for early-type galaxies

Details On the lack of a simple relation between RE and mu-e for early-type galaxies On the lack of a simple relation between RE and mu-e for early-type galaxies

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.248..523c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 248, Feb. 1, 1991, p. 523-527.

Astronomy and Astrophysics

Astronomy

14

Brightness Distribution, Galactic Clusters, Galactic Evolution, Astronomical Photometry, Data Correlation

Scientific paper

The direct correlation between effective radius Re and corresponding surface brightness mu-e, found for early-type galaxies by Kormendy (1977) and later confirmed by several studies, is reexamined using a homogeneous photometric data base relative to a luminosity-limited sample of 33 E and SO Virgo cluster galaxies. Contrary to previous belief, but in line with the existence of a tight fundamental plane for E galaxies and bulges of SOs, it is found that Re and mu-e are not simply correlated objects with the same total luminosity L(T) proportional to Ie Re-squared, but possess surface brightness and sizes which spread over wide ranges. It is suspected that the correlations between mu-e and Re reported in the literature are due to samples consisting mainly of luminous galaxies.

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