Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...264..446s&link_type=abstract
Astrophysical Journal, Part 1, vol. 264, Jan. 15, 1983, p. 446-450.
Astronomy and Astrophysics
Astronomy
24
Galactic Nuclei, Mass To Light Ratios, Quasars, Stellar Winds, X Ray Sources, Accretion Disks, Black Holes (Astronomy), Early Stars, Galactic Evolution, Luminosity, Radiation Effects, Red Giant Stars, Red Shift, Star Distribution, Stellar Mass Ejection
Scientific paper
Quasars may be fueled by stellar mass loss from OB stars and red giants: either normal winds and mass loss or X-ray induced stellar winds in luminous quasars with well developed cusps in the stellar density distribution. The X-ray induced mass loss may furnish part of the broad emission-line gas, as well as an accretion supply for a central black hole during transient bursts of quasar luminosity. The importance of a stellar density cusp may couple stellar dynamical processes with gas-radiative processes in the quasar nucleus, accounting for quasar variability. The coupling of X-ray luminosity ratios with mass supply and stellar population may imply evolution of optical-to-X-ray luminosity ratios with redshift. Most importantly, the evolution of the stellar population away from the initial mass function may explain the scarcity of quasars at low redshift.
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