Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.242..311n&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 242, Jan. 15, 1990, p. 311-317. Research supported by C
Astronomy and Astrophysics
Astronomy
26
Galactic Clusters, Interacting Galaxies, Many Body Problem, Brightness, Elliptical Galaxies, Galactic Evolution, Galactic Structure
Scientific paper
N-body simulations of merging encounters suggest that deviations from the r exp 1/4 law in the brightness profiles of elliptical galaxies at large radius are generated by mergers as well as by passing encounters. These deviations are the transitory result of the radial mixing of particles on to less-bound orbits, and the progressive decay with radius on the local dynamical time-scale. The effective radius R(eff) of merger remnants increases approximately linearly with mass, which indicates that a bright elliptical galaxy formed by the successive amalgamation of similar 'normal' ellipticals would move off Kormendy's (1977) relation in the plane defined by the product of and the R(eff), effective surface brightness. The location of brightest cluster members in this plane is thus consistent with the idea that they have experienced several mergers in the past.
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