The morphology of multiple-nucleus brightest cluster galaxies

Details The morphology of multiple-nucleus brightest cluster galaxies The morphology of multiple-nucleus brightest cluster galaxies

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...325...49l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 325, Feb. 1, 1988, p. 49-73.

Mathematics

Logic

116

Astronomical Photometry, Galactic Clusters, Galactic Evolution, Galactic Nuclei, Astronomical Maps, Brightness Distribution, Morphology

Scientific paper

The morphology of 16 multiple-nucleus brightest cluster galxies has been analyzed by modeling CCD images of the systems as line-of-sight superpositions of normal "secondary" cluster galaxies seen against a brighter "primary" galaxy. Fifty percent of the systems show morphological disturbances not seen in isolated elliptical galaxies and are thus assumed to be galaxies in tidal contact. The remaining 50% of the systems are morphologically consistent with superposition of undisturbed galaxies; their components are aassumed not to be in tidal contact. From these data the author estimates an average cannibalism rate of LT ≈ 2L* per 5×109yr for the brightest cluster galaxy. This in turn implies a dynamical correction of Δq0 ≈ 0.3 to q0 measured from metric liminosities of brightest cluster galaxies.

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