The formation of counterrotating cores in elliptical galaxies

Details The formation of counterrotating cores in elliptical galaxies The formation of counterrotating cores in elliptical galaxies

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...361..381b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 361, Oct. 1, 1990, p. 381-393.

Astronomy and Astrophysics

Astrophysics

105

Astronomical Photometry, Counter Rotation, Elliptical Galaxies, Galactic Nuclei, Galactic Rotation, Interacting Galaxies, Angular Momentum, Cray Computers

Scientific paper

The mechanism proposed by Kormendy (1984) for the formation of counterrotating cores in elliptical galaxies is investigated using self-consistent numerical simulations of mergers between a high- and a low-luminosity elliptical galaxies. The conditions for a counterrotation to appear are determined, observational properties of the remnants are described, and the evolution of the structural and kinematic parameters of the larger galaxy is analyzed. It is shown that a counterrotation results only when the merging orbits are retrograde, due to a large change in the secondary spin during the merger.

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