The evolution of the Eddington ratio for active galactic nuclei

Details The evolution of the Eddington ratio for active galactic nuclei The evolution of the Eddington ratio for active galactic nuclei

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...209...27p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 209, no. 1-2, Jan. 1989, p. 27-45.

Astronomy and Astrophysics

Astrophysics

37

Active Galactic Nuclei, Eddington Approximation, Galactic Mass, Luminosity, Quasars, Seyfert Galaxies, Gravitational Fields, H Beta Line, Radiation Pressure, Red Shift, Statistical Correlation

Scientific paper

Masses, bolometric luminosities, and Eddington ratios are derived for a sample of 138 active galactic nuclei with redshifts of between 0.002 and 3.5. After a careful examination of the assumptions involved, the constancy of the Eddington ratio with redshift is excluded at a high degree of confidence, using a partial correlation analysis to subtract the dependence of both quantities on luminosity and to avoid selection effects; the majority of the high redshift quasars are super-Eddington and have an Eddington ratio which is at least one order of magnitude greater than that of local Seyfert 1 galaxies.

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