Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.211..753b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 211, Dec. 15, 1984, p. 753-765.
Astronomy and Astrophysics
Astronomy
68
Astronomical Models, Galactic Evolution, Galactic Structure, Many Body Problem, Accretion Disks, Disk Galaxies, Elliptical Galaxies, Spheroids
Scientific paper
A collisionless N-body system is studied theoretically in order to determine the response of a protobulge to the field of an exponential disk. In the limit where the time scale of the disk's growth is long compared to the dynamic time scale of the bulge, the final state of the bulge is considered to be dependent on the final stage of the disk. It is shown that the disk field acts to increase the surface brightness, velocity dispersion, rotation velocity and flattening of the bulge, but does not directly account for either the thick disk or box-shaped bulge phenomena. The results suggest that the close similarity observed between bulges and ellipticals cannot result from disk accretion on to a pre-existing normal elliptical unless the disks are considerably less massive than is currently believed.
Barnes Joshua
White Simon D. M.
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