Surface photometry of blue compact dwarf galaxies from the Byurakan lists

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

Surface photometry of 23 ultraviolet excess galaxies from the two Byurakan surveys (FBS and SBS), selected to be blue compact dwarf candidates, has been made in B and R colors. A remarkable fraction of the sample exhibit a projected brightness distribution following the same de Vaucouleurs law as the bright spheroidal objects of the field (ellipticals and bulges of spirals). The other most frequent morphological type has an exponential brightness distribution, therefore similar to usual dwarf Magellanic irregulars. From their small absolute dimensions and average high effective surface brightness, the studied objects are indeed “compact” in the usual empirical sense.

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