Low-luminosity early-type galaxies. I - Photometry and morphology

Details Low-luminosity early-type galaxies. I - Photometry and morphology Low-luminosity early-type galaxies. I - Photometry and morphology

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as...98..229p&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 98, no. 2, p. 229-243.

Astronomy and Astrophysics

Astrophysics

19

Astronomical Photometry, Dwarf Galaxies, Elliptical Galaxies, Galactic Evolution, Luminosity, Color-Magnitude Diagram, Galactic Structure, Southern Sky

Scientific paper

New multiaperture photoelectric photometry in U, B, V, R, and I for 50 southern low-luminosity early-type galaxies (LLEs) is presented. Asymptotic magnitude and mean surface brightness within the effective aperture are derived from fits to r exp 1/4 growth curves, and colors are reduced at an effective radius for 154 galaxies. Morphological and structural analysis of the LLE sample, based on the ESO-LV image data base, shows that the average flattening of these galaxies is high. The sample can be divided into four main categories. There is no correlation between the morphological type for t of not greater than -3 and any of the structural and geometrical properties investigated. Only a few galaxies show a boxy isophote shape, while a greater fraction shows disky isophotes.

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