Abstract
Assuming the velocity dispersion of the emission-line clouds is induced by gravity, we calculate the dynamic mass (M ∼ v 2 r/G) of the central object in a sample of ∼ 50 Seyfert 1 nuclei and ∼ 40 nearby quasars. Typical values are 108M⊙ for Seyferts and 109M⊙ for quasars. The dynamic mass is found to be proportional to the continuum luminosity (at the ∼ 20σ confidence level), which suggests a universal value of L/L Edd . For the optical band we find log <L c /L Edd >=-2.0±0.3. Applying the same technique to the OIII line, one can estimate the dynamic mass within the radius of the narrow-line region (∼ 100 pc). For some 50 objects of the sample above, this mass is found to be well correlated with the continuum luminosity and with the dynamic mass estimated from the Hβ line.
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References
Bassani, L., Dean, A.J. and Sembay, S. 1983, Astron. Astrophys., 125,52.
Blumenthal, G. R., and Mathews, W. G. 1975, Ap. J., 198, 517.
------------ 1979, Ap. J., 233, 479.
Blumenthal, G.R., Keel, W.C., and Miller, J.S. 1982 Ap. J., 257, 499.
Dibai, E.A. 1981a, Sov. Astr., 24, 389.
------------ 1981b, Sov. Astr. Lett., 7, 248.
------------ 1983, Sov. Astr., 28, 245.
Feldman, F.R., Weedman, D.W, Balzano, V.A., and Ramsey, L.W. 1982, Ap. J., 256 427.
Gaskell, C.M. 1985, Ap. J., 291, 112.
Heckman, T.M., Miley, G.K. and Green, R.F. 1984, p. J., 281,525.
Kinney, A. L., Huggins, P. J., Bregman, J. N., and Glassgold, A.E. 1985, Ap. J. 291, 128.
Kwan, J., and Krolik, J.H. 1981, Ap. J., 250, 478.
Kuhr, H., McAlary, C.W., Rudy, R.J., Stittmatter, PA., and Rieke, G.H. 1984, Ap. J. Lett., 284, L5.
Mathews, W. G. 1982, Ap. J., 252, 39.
Mathews, W. G., Blumenthal, G.R. and Grandi, S.A. 1980, Ap. J., 235, 971.
Mushotzky, R., and Ferland, G.J. 1984, Ap. J., 278, 558.
Netzer, H. 1980, Ap. J., 236, 406.
Steiner, J.E. 1981, Ap. J., 250, 469.
Wandel, A. 1984, M.N.R.A.S., 207, 861.
Wandel, A. and Yahil, A. 1985, Ap. J. Lett. submitted.
Wilson, A.S. and Heckman, T.M. 1984, in the proceedings of the Santa Cruz workshop.
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© 1986 Springer Science+Business Media Dordrecht
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Wandel, A. (1986). Emission Lines Indicating a Universal L/M Ratio for the Central Engine in AGN ?. 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_85
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DOI: https://doi.org/10.1007/978-94-009-4562-3_85
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