Hostname: page-component-8448b6f56d-jr42d Total loading time: 0 Render date: 2024-04-25T00:07:17.244Z Has data issue: false hasContentIssue false
  • English
  • Français

Origin of Blazar Activity

Published online by Cambridge University Press:  25 May 2016

M. M. Romanova
M. M. Romanova*
Affiliation:
Space Research Institute of the Russian Academy of Sciences, Moscow, Russia; and Department of Astronomy, Cornell University, Ithaca, NY 14853-6801; romanova@astrosun.tn.cornell.edu

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Models of Blazars based on the propagation of finite discontinuities or fronts in the Poynting flux jet from the innermost regions of an accretion disk around a black hole are discussed. Such fronts may be responsible for short time–scale (from less than hours to days) flares in different wavebands from high frequency radioband to TeV, with delay in low radio frequencies as a result of synchrotron self-absorption. The cases of magnetic fields of one and opposite polarities across the front are investigated. We find that annihilation of magnetic field in the front leads to higher energy spectrum of leptons and possibility of strong TeV flares. Electron–positron pairs form in most cases as a result of interaction between numerous synchrotron photons and SSC photons, and constitute the majority species, compared with the ions at subparsec scales. Frequent weak outbursts may be responsible for flickering core radiation in all wavebands, while the stronger outbursts may be observed as short time–scale flares.

Type
III. AGN Theory and Models
Information
Symposium - International Astronomical Union , Volume 194: Activity in Galaxies and Related Phenomena , 1999 , pp. 256 - 268
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

Aharonian, F.A., et al. 1999, A & A, 342, 69 Google Scholar
Alfvén, H. 1968, JGR, 73, 4379 CrossRefGoogle Scholar
Aller, H.D., Aller, M.F., & Hughes, P.A. 1985, ApJ, 298, 296 CrossRefGoogle Scholar
Ambartsumian, V.A. 1958, La structure et l'evolution de l'univers , Solvey Conference, p. 241, Bruxelles, ed. by Stoops, R. Google Scholar
Atoyan, A.M., & Aharonian, F.A. 1997, ApJ, 490, L149 CrossRefGoogle Scholar
Begelman, M.C., Blandford, R.D., & Rees, M.J. 1984, Rev. Mod. Phys., 56, 255 CrossRefGoogle Scholar
Belokon, E.T. 1988, Astrophysics, 27, 588 CrossRefGoogle Scholar
Blandford, R.D. 1976, MNRAS, 176, 465 CrossRefGoogle Scholar
Blandford, R.D. 1993, in Proc. Compton Symp. 1992, ed. Friedlander, M., Gehrel, N., & Macomb, D.J., New York: AIP, 553 Google Scholar
Blandford, R.D. & Königl, A. 1979, ApJ, 232, 34 CrossRefGoogle Scholar
Blandford, R.D., & Levinson, A. 1995, ApJ, 441, 79 CrossRefGoogle Scholar
Blandford, R.D., & Payne, D.G. 1982, MNRAS, 199, 883 CrossRefGoogle Scholar
Blandford, R.D., & Rees, M. 1978, in Pittsburgh Conference on BL Lac Objects , ed. Wolfe, A.M., Univ. Pittsburgh Press, 1978, p.328 Google Scholar
Blandford, R.D., & Znajek, R.L. 1977, MNRAS, 179, 433 CrossRefGoogle Scholar
Bloom, S.D., et al. 1997, ApJ, 490, L145 CrossRefGoogle Scholar
Burns, M.L., & Lovelace, R.V.E. 1982, ApJ, 262, 87 CrossRefGoogle Scholar
Chiaberge, M., & Ghisellini, G. 1998, MNRAS, astro-ph/9810263 Google Scholar
Colgate, S.A. & Li, H. 1997, in Relativistic Jets in AGNs , ed. Ostrowski, M., Sikora, M., Madejski, G. and Begelman, M., Poland, Krakow, p.170 Google Scholar
Dermer, C.D., Schlickeiser, R., & Mastichiadis, A. 1992, A&A, 256, L27 Google Scholar
Eilek, J.A., & Hughes, P.E., in Astrophysical Jets , ed. Hughes, P.E., Cambrudge University Press, Cambridge, p. 428 Google Scholar
Gaidos, J.A. et al. 1996, Nature, 383, 319 CrossRefGoogle Scholar
Ghisellini, G., & Madau, P. 1996, MNRAS, 280, 67 CrossRefGoogle Scholar
Goldreich, P., & Julian, W.H. 1969, ApJ, 157, 869 CrossRefGoogle Scholar
Hughes, P.A., Aller, H.D., & Aller, M.F. 1985, ApJ, 298, 301 CrossRefGoogle Scholar
Illarionov, A.F., & Krolik, J.H. 1996, ApJ, 469, 698 CrossRefGoogle Scholar
Kinman, T.D. 1977, Nature, 267, 798 CrossRefGoogle Scholar
Krichbaum, T.P. 1995, in: Quasars and AGN: High Resolution Radio Imaging , ed. Cohen, M. and Kellerman, K., proceedings of a Conference of the National Academy of Sciences, Irvine, CA, USA Google Scholar
Levinson, A. 1998, ApJ, 507, 145, 1998 CrossRefGoogle Scholar
Livio, M., Ogilvie, G.I., & Pringle, J.E. 1998, ApJ, in press Google Scholar
Lovelace, R.V.E. 1976, Nature, 262, 649 CrossRefGoogle Scholar
Lovelace, R.V.E., McAuslan, J., & Burns, M. 1979, in Proceedings of La Jolla Institute Workshop on Particle Acceleration Mechanisms in Astrophysics , ed. Arons, J., Max, C., & McKee, C. (AIP, New York).Google Scholar
Lovelace, R.V.E., Newman, W.I., & Romanova, M.M. 1997, ApJ 484, 628 (LNR97) CrossRefGoogle Scholar
Lovelace, R.V.E., Romanova, M.M., & Newman, W.I. 1994, ApJ, 437, 136 (LRN94) CrossRefGoogle Scholar
Lovelace, R.V.E., Wang, J.C.L., & Sulkanen, M.E. 1987, ApJ, 315, 504 CrossRefGoogle Scholar
Lubow, S.H., Papaloizou, J.C.B., & Pringle, J.E. 1994, MNRAS, 268, 1010 CrossRefGoogle Scholar
Macdonald, D.A., & Thorn, K.S. 1982, MNRAS, 198, 345 CrossRefGoogle Scholar
Magdziarz, P., Moderski, R., & Madejski, G.M. 1997, in: Relativistic Jets in AGNs , ed. Ostrowski, M., Sikora, M., Madejski, G. and Begelman, M., Poland, Krakow, p.238 Google Scholar
Mannheim, K., & Biermann, P.L. 1992, A&A, 253, L21 Google Scholar
Maraschi, L., Ghisellini, G., & Celotti, A. 1992, ApJ, 397, L5 CrossRefGoogle Scholar
Marscher, A.P. 1980, ApJ, 235, 386 CrossRefGoogle Scholar
Marscher, A.P., & Bloom, S.D. 1992, in The Compton Observatory Science Workshop , (ed. Shader, C.R., Gehrels, N., and Dennis, B.) NASA CP-3137, 346 Google Scholar
Mastichiadis, A., & Kirk, J.G. 1997, A & A, 320, 19 Google Scholar
Mattox, J.R., et al. 1997, ApJ, 476, 692 CrossRefGoogle Scholar
Pian, E., et al. 1998, ApJ, 492, L17 CrossRefGoogle Scholar
Protheroe, R.J. & Biermann, P.L. 1997, APh, 6, 293 Google Scholar
Punch, M. et al. 1992, Nature 358, 477 CrossRefGoogle Scholar
Raga, A.C., Canto, J., Binette, L., & Calvet, N. 1990, ApJ, 364, 601 CrossRefGoogle Scholar
Romanova, M.M., & Lovelace, R.V.E. 1992, A&A, 262, 26 (RL92) Google Scholar
Romanova, M.M., & Lovelace, R.V.E. 1997, ApJ, 475, 97 (RL97) CrossRefGoogle Scholar
Romanova, M.M., Ustyugova, G.V., Koldoba, A.V., Chechetkin, V.M., & Lovelace, R.V.E., 1997, ApJ, 482, 708 CrossRefGoogle Scholar
Romanova, M.M., Ustyugova, G.V., Koldoba, A.V., Chechetkin, V.M., & Lovelace, R.V.E., 1998, ApJ, 500, 703 CrossRefGoogle Scholar
Sambruna, R.M., Maraschi, L., & Urry, C.M. 1996, ApJ, 463, 444 CrossRefGoogle Scholar
Sambruna, R.M., et al. 1997, ApJ, 474, 639 CrossRefGoogle Scholar
Sambruna, R.M., et al. 1998, ApJ, in press, astro-ph/9810319 Google Scholar
Sikora, M., Begelman, M., & Rees, M. 1994, ApJ, 421, 153 CrossRefGoogle Scholar
Takahara, F. 1997, in Relativistic Jets in AGNs , ed. Ostrowski, M., Sikora, M., Madejski, G. and Begelman, M., Poland, Krakow, p.170 Google Scholar
Thompson, C. 1997, in Relativistic Jets in AGNs , ed. Ostrowski, M., Sikora, M., Madejski, G. and Begelman, M., Poland, Krakow, p.253 Google Scholar
Wagner, S.J., & Witzel, A. 1995, Ann. Rev. Astron. Astropys., 33, 163 CrossRefGoogle Scholar
Urry, M.C., & Padovani, P. 1995, PASP, 107, 803 CrossRefGoogle Scholar