Mass outflow and its consequences in the circumnuclear zones of galaxies
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
Munoz-Tunon, C. et al.
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1988