Mathematics – Logic
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...251..508m&link_type=abstract
Astrophysical Journal, Part 1, vol. 251, Dec. 15, 1981, p. 508-517. Research supported by the Alfred P. Sloan Foundation.
Mathematics
Logic
66
Celestial Mechanics, Elliptical Galaxies, Galactic Evolution, Galactic Structure, Luminosity, Astronomical Catalogs, Data Sampling, Galactic Clusters, Velocity Distribution
Scientific paper
It is confirmed that E galaxies follow a relation between luminosity and dispersion in which L varies as sigma to the fourth, by means of Fourier quotient method which yielded velocity dispersions in 19 luminous E and cD galaxies and thereby clarified the dynamical difference between these morphological types. E galaxy mass-to-light ratios averaged 6.5 + or - 0.7, while those of the brightest cluster members averaged 9.9 + or - 0.8. It is also determined that the difference in magnitudes between a brightest cluster member and an elliptical of identical velocity dispersion is correlated, in a manner consistent with galaxy merger models, with the galaxy's core radius and central surface brightness. A merger model that reproduces these effects and increases the galaxy mass-to-light ratio as mergers progress is constructed.
Kirshner Robert P.
Malumuth Eliot M.
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