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X-Rays from Active Galactic Nuclei

Published online by Cambridge University Press:  30 March 2016

A.C. Fabian
A.C. Fabian*
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge, CB3 OHA, U.K.

Extract

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Recent X-ray observations of active galactic nuclei and Seyfert galaxies in particular are briefly reviewed. The application of the efficiency limit to rapidly varying luminous sources such as NGC 6814 is discussed. It is argued that the variability and probable MeV spectral turnover imply that most of the electrons which radiate the observed flux are only mildly relativistic. A possible link between the steep soft X-ray spectra and featureless optical continua of BL Lac objects is considered.

Type
Joint Discussions
Information
Highlights of Astronomy , Volume 6: Highlights of Astronomy. As presented at the XVIIIth General Assembly of the IAU, 1982 , 1983 , pp. 491 - 498
Copyright
Copyright © Reidel 1983

References

Barr, P., White, N., Sanford, P. and Ives, J.: 1977, Monthly Notices Roy.Astron.Soc., 181, 43P.Google Scholar
Blandford, R.D. and Rees, M.J.: 1978, in Pittsburgh Conference on BL Lac Objects, ed. Wolfe, A.M., Pittsburgh, pp 328.Google Scholar
Cavaliere, A.: 1981, in Plasma Astrophysics, Varenna.Google Scholar
Cavaliere, A.: 1983, this volume, p. 511.Google Scholar
Cavallo, G. and Rees, M.J.: 1978, Monthly Notices Roy.Astron.Soc., 183, 359.CrossRefGoogle Scholar
Fabian, A.C.: 1979, Proc.Roy.Soc., 366, 449.Google Scholar
Fabian, A.C. and Rees, M.J.: 1979, in X-ray Astronomy, ed. Baity, W.A. and Peterson, L.E., Pergamon.Google Scholar
Fabian, A.C., Kembhavi, A.K. and Ward, M.J. : 1981, Space Sci.Rev., 30, 113.Google Scholar
Gould, R.J.: 1982. Astrophys. J., 254, 755.Google Scholar
Guilbert, P.W.: 1981, Ph.D. dissertation, University of Cambridge.Google Scholar
Guilbert, P.W.: 1982, private communication.Google Scholar
Guilbert, P.W. and Fabian, A.C.: 1982, Nature 296, 226.Google Scholar
Guilbert, P.W., Fabian, A.C. and Stepney, S.: 1982, Monthly Notices Roy.Astron.Soc., 199, 19P.Google Scholar
Guilbert, P.W., Fabian, A.C. and McCray, R.: 1982, Astrophys. J. in press.Google Scholar
Guilbert, P.W., Fabian, A.C. and Ross, R.R.: 1982, Monthly Notices Roy.Astron.Soc., 199, 763.Google Scholar
Katz, J.I.: 1976, Astrophys. J., 206, 910.Google Scholar
Krolik, J.H., McKee, C.F. and Tarter, C.B.: 1981, Astrophys. J., 249, 422.Google Scholar
Ku, W.H.M., Helfand, D.J. and Lucy, L.B.: 1980, Nature, 288, 323.Google Scholar
Lightman, A.P.: 1981, in X-ray Astronomy in the 1980’s, ed. Holt, S.S., NASA, p. 143.Google Scholar
Lightman, A.P., Giacconi, R. and Tananbaum, H.: 1978, Astrophys. J., 224, 375.Google Scholar
Lightman, A.P.: 1982, Astrophys. J., 253, 842.Google Scholar
Maccacaro, T., Perola, G.C. and Elvis, M.: 1982, Astrophys. J., 257, 47.Google Scholar
Marshall, N., Warwick, R.S. and Pounds, K.A.: 1981, Monthly Notices Roy.Astron.Soc., 194, 987.Google Scholar
Marshall, F.E., Becker, R.H., Holt, S.S. and Mushotzky, R.F.: 1981, Bull. Am.Astron.Soc., 12, 796.Google Scholar
Matilsky, T., Shrader, C. and Tananbaum, H.: 1982, Astrophys. J.Lett., 258, LI.Google Scholar
McCray, R.: 1979, in Active Galactic Nuclei, ed. Hazard, C. and Mitton, S., Cambridge University Press.Google Scholar
Mushotsky, R.F.: 1982, Astrophys. J., 256, 92.Google Scholar
Perotti, F., Delia Ventura, A., Villa, G., Di Cocco, G., Bassani, L., Butler, R.C., Carter, J.N. and Dean, A.J.: 1981, Astrophys. J., 247, L63.CrossRefGoogle Scholar
Piccinotti, G., Mushotzky, R.F., Boldt, E.A., Holt, S.S., Marshall, F.E., Serlemitsos, P.J. and Shafer, R.A.: 1982, Astrophys. J., 253, 485.Google Scholar
Rothschild, R.E., Mushotzky, R.F., Baity, W.A., Gruber, D.E. and Matteson, J.L.: 1982, preprint.Google Scholar
Schönfelder, V.: 1982, talk at XXIV COSPAR meeting, Ottawa.Google Scholar
Spitzer, L.: 1956, Physics of fully ionized gases, Wiley.Google Scholar
Svensson, R.: 1982, Astrophys. J., 258, 335.Google Scholar
Takahara, F. and Tsuruta, S.: 1982, Prog. Theo.Phys., 67, 485.Google Scholar
Tananbaum, H., Avni, Y., Branduardi, G., Elvis, M., Fabbiano, G., Feigelson, E., Giacconi, R., Henry, J.P., Pye, J.P., Soltan, A. and Zamorani, G.: 1979, Astrophys. J., 239, L9.Google Scholar
Tananbaum, H.: 1980, in X-ray Astronomy, eds. Giacconi, R. and Setti, G., Reidel, D., p. 291.Google Scholar
Tananbaum, H., Peters, G., Forman, W., Giacconi, R., Jones, C. and Avni, Y.: 1978, Astrophys. J., 223, 74.Google Scholar
Tennant, A.F., Mushotzky, R.F., Boldt, E.A. and Swank, J.H.: 1981, Astrophys. J., 251, 15.Google Scholar
Tennant, A. and Mushotzky, R.F.: 1982, preprint.Google Scholar
Urry, C.M. and Mushotzky, R.F.: 1982, Astrophys. J., 253, 38.Google Scholar
Worrall, D.M., Boldt, E.A., Holt, S.S., Mushotzky, R.F. and Serlemitsos, P.J.: 1981, Astrophys. J., 243, 53.Google Scholar
Zamorani, G., Henry, J.P., Maccacaro, T., Tananbaum, H., Soltan, A., Liebert, J., Stocker, J., Strittmatter, P.A., Weymann, R.J., Smith, M.G. and Condon, J.J.: 1981, Astrophys. J., 245, 357.Google Scholar