Other
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....104.1339s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 104, no. 4, p. 1339-1348, 1672, 1673.
Other
56
Accretion Disks, Galactic Halos, Galactic Mass, Galactic Rotation, Galactic Structure, Mass Distribution, Peculiar Galaxies, Astronomical Models, Cosmic Dust, Dark Matter, Precession
Scientific paper
The complex dust lanes in the S0 galaxy NGC 4753 are shown to be consistent with a disk that is strongly twisted by differential precession. Yet another peculiar S0 can therefore be explained as the result of an accretion event. An evolving disk model is fitted to the observed distribution. This disk is inclined by 15 deg relative to the galaxy's equatorial plane and twisted such that its line of nodes changes smoothly by 3.8 pi over a factor of seven in radius. The model indicates that most of the galaxy's mass is unseen, is nearly spherically distributed, and has a nearly scale-free spatial distribution. The ellipticity of the total galactic mass distribution must be constant to within 20 percent over the radial extent of the twisted disk - a conclusion which may significantly constrain galaxy formation mechanisms.
Durisen Richard H.
Kormendy John
Steiman-Cameron Thomas Y.
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