The surface-brightness-effective-size relation for elliptical galaxies in the cores of clusters

Details The surface-brightness-effective-size relation for elliptical galaxies in the cores of clusters The surface-brightness-effective-size relation for elliptical galaxies in the cores of clusters

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....94.1111h&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 94, Nov. 1987, p. 1111-1115. Research supported by the Research Corp.

Astronomy and Astrophysics

Astronomy

41

Brightness, Elliptical Galaxies, Galactic Clusters, Astronomical Photometry, Cosmology, Galactic Structure, Stellar Luminosity

Scientific paper

Surface photometry of 372 elliptical galaxies has been performed using CCD images of the centers of 97 nearby rich Abell clusters. The strong correlation between surface brightness and effective size, originally found by Kormendy (1977), is clear in the data. Brightest cluster galaxies show much less scatter about the mean relation defined by these data than do lower-luminosity cluster ellipticals, and the slope of the relation is shallower for the brightest galaxies; these two results are tentative, however, because of uncertain selection and environmental effects. When combined with published central velocity dispersions, the photometry yields a relation for brightest cluster galaxies that is in good agreement with the mean relation for elliptical galaxies found by Djorgovski and Davis (1987). Use of the surface-brightness/scale-length relation to measure the lookback luminosity evolution of the stellar content in galaxies is promising.

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