Nucleated spheroidal galaxies

Details Nucleated spheroidal galaxies Nucleated spheroidal galaxies

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91..271v&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 91, Feb. 1986, p. 271-274.

Astronomy and Astrophysics

Astronomy

58

Galactic Evolution, Galactic Nuclei, Galactic Structure, Dwarf Galaxies, Ellipticity, Luminosity, Spatial Distribution, Spheroids

Scientific paper

Early-type galaxies belong to two form families: ellipticals and spheroidals. The fraction of nucleated spheroidal galaxies increases dramatically with luminosity. On average, nucleated spheroids are found to be rounder than non-nucleated ones. This suggests that nuclei might have been formed by gas sinking to the centers of the most slowly rotating spheroidals. The frequency distributions of apparent flattening values for ellipticals and for spheroidals do not differ significantly. This result is, perhaps, unexpected if spheroidals are swept-disk systems. Finally it is shown that nucleated and non-nucleated spheroidal galaxies in the Virgo cluster have differing spatial distributions. A major clumping of such nucleated objects is centered on the giant elliptical M86.

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