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Variability in Active Galactic Nuclei

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Abstract

AGN (Active Galactic Nuclei) have their profound time variability over a wide range of time scales. Although many results of AGN variability have been provided from wide band wavelength observations, I would like to concentrate the recent problems concerning a nearby region of their central engine based on the X-ray observations which are most efficient to investigate this region. In this paper we will investigate mainly the result of Seyfert galaxies which would be generalized to other AGN.

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References

  • Abramowicz, M. A., Bao, G., Fiore, F.et al.: 1992,Nature, submitted.

  • Antonucci, R. R. J. and Miller, J. S.: 1985,Astrophysical Journal 297, 621.

    Google Scholar 

  • Awaki, H.et al.: 1990,Nature 34, 544.

    Google Scholar 

  • Barr, P. and Mushotzky, R. F.: 1986,Nature 320, 421.

    Google Scholar 

  • Begelman, M. C. and De Kool, M. 1991,Variability of active galactic nuclei, eds. H. R. Miller and P. J. Wiita (Cambridge Univ. Press.), p. 198.

  • Bond, I. A., Matsuoka, M. and Yamauchi, M.: 1992,Astrophysical Journal, submitted.

  • Brinkmann, W.: 1991, MPE conference

  • Cavalo, G. and Rees, M. J.: 1978,Monthly Notices of the RAS 183, 359.

    Google Scholar 

  • Celloti, A., Fabian, A. C. and Rees, M. J.: 1992,Monthly Notices of the RAS 255, 419.

    Google Scholar 

  • Done, C., Madejski, G. M., Mushotzky, R. F., Turner, T. J. Koyama, K., and Kunieda, H. 1992,Frontiers of X-ray Astronomy, eds. Y. Tanaka and K. Koyama (Univ. Academy Press), p. 525.

  • Elvis, M., Briel, U. G. and Henry, J. P.: 1983,Astrophysical Journal 268, 105.

    Google Scholar 

  • Fabian, A. C.: 1979,Proc. Roy. Soc. 336, 449.

    Google Scholar 

  • Fabian, A. C., George, I., Miyoshi, S. and Rees, M. J.: 1990,Monthly Notices of the RAS 242, 14.

    Google Scholar 

  • Fassnacht, C., Elvis, M., Wilson, A. S. and Briel, U.: 1990,Astrophysical Journal 361, 459.

    Google Scholar 

  • Fiore, F., Massaro, E. and Barone, P.: 1991,Astronomy and Astrophysics, submitted.

  • Fiore, F., Perola, G. C., Matsuoka, M., Yamauchi, M. and Piro, L. :1991,Variability of Active Galactic Nuclei, eds. H. R. Miller and P. J. Wiita (Cambridge Univ. Press), p. 273.

  • Fiore, F., Perola, G. C., Matsuoka, M., Yamauchi, M. and Piro, L. :1992,Astronomy and Astrophysics, to be appeared.

  • Guilbert, P. W. and Rees, M. J.: 1988,Monthly Notices of the RAS 233, 475.

    Google Scholar 

  • Halpern. J. P.: 1985,Astrophysical Journal 290, 130.

    Google Scholar 

  • Hayakawa, S.: 1991,Nature 351, 214.

    Google Scholar 

  • Holt, S. S., Mushotzky, R. F., Becker, R. H., Boldt, E. A., Serlemitsos, P. J., Szymkowiak, A. E. and White, N. E.: 1980,Astrophysical Journal, Letters to the Editor 241, L13.

    Google Scholar 

  • Honma, F., Matsumoto, R. and Kato, S.: 1992, preprint.

  • Lighman, A. J. and White, T. R.: 1988,Astrophysical Journal 335, 57.

    Google Scholar 

  • Lightman, A. P. and Zdziarski, A. A.: 1987,Astrophysical Journal 319, 643.

    Google Scholar 

  • Kawara, K., Nishida, M. and Gregory, B.: 1989,Nature 341, 27.

    Google Scholar 

  • Kawara, K., Nishida, M. and Gregory, B.: 1990,Astrophysical Journal 352, 433.

    Google Scholar 

  • Koyama, K., Inoue, H., Tanaka, Y., Ohashi, T. and Matsuoka, M.: 1989,Publications of the ASJ 41, 731.

    Google Scholar 

  • Kuieda, H.et al.: 1990.Nature 235, 786.

    Google Scholar 

  • Kunieda, H.et al.: 1991,Iron Line Diagnostics in X-ray Sources. eds. A. Treves, G. C. Perola and L. Stella (Spring-Verlarg), p. 241.

  • Malkan, M. A. and Sargent, W. L. W.: 1982,Astrophysical Journal 254, 22.

    Google Scholar 

  • Makino, F.et al.: 1990.Astrophysical Journal, Letters to the Editor 347, L9.

    Google Scholar 

  • Matsuoka, M., Ikegami, T., Inoue, H. and Koyama, K.: 1986,Publications of the ASJ 38, 285.

    Google Scholar 

  • Matauoka, M., Piro, L., Yamauchi, M. and Murakami. T.: 1990,Astrophysical Journal 361, 440.

    Google Scholar 

  • McHardy, J. M. 1989,23rd ESLAB Symposium X-ray Astronomy, 2. AGN and the X-Ray Background, eds. by J. Hunt and B. Battrick (ESA-France), p.111.

  • Mittaz, J. P. D. and Branduardi-Raymont, G.: 1989.Monthly Notices of the RAS 238, 1029.

    Google Scholar 

  • Mulchaey, J. S., Mushotzky, R. F. and Weaver, K. A.: 1992,Astrophysical JournalLetters, in press.

  • Mushotzky, R. F.: 1984,Adv. Space Res. 3, No.10-12, p.153.

    Google Scholar 

  • Nandra, K., Pounds, K. A.et al.: 1991,Monthly Notices of the RAS 248, 760.

    Google Scholar 

  • Netzer, H.: 1990, “Active Galactic Nuclei” eds. by R. D. Blaudford, H. Netzer and L. Woltjer (Springer-Verlag), p.57.

  • Piro, L. Yamauchi, M. and Matsuoka, M.: 1990,Astrophysical Journal, Letters to the Editor 360, L35.

    Google Scholar 

  • Pounds, K. A. and McHardy, I. M.: 1988,Physics of Neutron Stars and Black Holes, Ed. by Y. Tanaka (Universal Academy Press. Inc.), p.285.

  • Pounds, K. A., Nandra, K., Stewart, G. C., George, I. M. and Fabian, A. C.: 1990,Nature 344, 132.

    Google Scholar 

  • Remillard, R. A.et al.: 1991,Nature 350, 589.

    Google Scholar 

  • Sanders, D. B., Phinnery, E. S., Neugebauer, G., Soifer, B. T. and Mathews, K.: 1989,Astrophysical Journal 347, 29.

    Google Scholar 

  • Sun, H-W. and Malkan, M. A.: 1989,Astrophysical Journal 346, 68.

    Google Scholar 

  • Turner, T. J., Weaver, K. A., Mushotzky, R. F., Holt, S. S. and Madejski, G. M.: 1991,Astrophysical Journal 381, 85.

    Google Scholar 

  • Turner, T. J. and Pounds, K. A.: 1989,Monthly Notices of the RAS 240, 833.

    Google Scholar 

  • Urry, C. M., Arnaud, K. A., Edelson, R. A., Kruper, J. S. and Mushotzky, R. F.: 1989,Proceedings of the 23rd ESLAB Symp., eds. J. Hunt and B. Battrick (ESA publications), p. 789.

  • Wilkes, B. and Elvis, M.: 1987,Astrophysical Journal 323, 243.

    Google Scholar 

  • Williams, O. R., Turner, M. J. L., Stewart, G. C.et al.: 1992,Astrophysical Journal, in press.

  • Yamauchi, M., Matsuoka, M., Kawai, N. and Yoshida, A.: 1991,Astrophysical Journal, in press.

  • Yaqoob, T.: 1992,Monthly Notices of the RAS in press (March 1992).

  • Yaqoob, T.et al.: 1992, in preparation.

  • Yaqoob, T. and Warwick, R. S.: 1991,Monthly Notices of the RAS 248, 773.

    Google Scholar 

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  1. Institute of Physical and Chemical Research (RIKEN), 351-01, Hirosawa, Wako-shi, Saitama, Japan

    M. Matsuoka

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  1. M. Matsuoka
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Matsuoka, M. Variability in Active Galactic Nuclei. Astrophys Space Sci 210, 245–257 (1993). https://doi.org/10.1007/BF00657909

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