Bibcode
Munoz-Tunon, C.; Beckman, J. E.
Bibliographical reference
Astrophysics and Space Science (ISSN 0004-640X), vol. 147, no. 1, Aug. 1988, p. 173-187.
Advertised on:
8
1988
Citations
3
Refereed citations
2
Description
Spectroscopic and photometric observations are used to determine the
distributions of gas and the kinematics in the central zones of a number
of spirals. In addition to a ring structure in the gas, there is often
found a measurable expansion with high radial velocity near the nucleus.
A significant correlation is noted between the absence of central gas
and the size of the nuclear bulge of a galaxy, with the Sa and Sb
galaxies having lower ratios of gas to stars than the Sc and Sd
galaxies. It is suggested that radially progressive bursts of star
formation can account for many of the observations and may be related to
the presence of LINERs.