Abstract
Central regions of galaxies are seen as the product of a random agglomeration of clouds. The resulting distribution of angular momentum is a Maxwellian one. Small angular momentum is a necessary condition for compact cores. For a given mass in virial equilibrium, a small angular momentum means a fast rotation velocity. We assume the broad line width to be caused mainly by rotation.
A relation between the relative frequency and the angular momentum contrast of the central region is given (relative with respect to all galaxies of the same luminosity). The data for Seyfert 1 galaxies are not in conflict with this relation. The application to quasars seems possible.
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Brosche, P. (1986). The Relative Frequency of Compact Extragalactic Objects. In: Giuricin, G., Mardirossian, F., Mezzetti, M., Ramella, M. (eds) Structure and Evolution of Active Galactic Nuclei. Astrophysics and Space Science Library, vol 121. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4562-3_35
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DOI: https://doi.org/10.1007/978-94-009-4562-3_35
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