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Shocks and Photoionization in the Narrow-Line Region

Published online by Cambridge University Press:  12 April 2016

Sueli M. Viegas  and
Marcella Contini
Sueli M. Viegas
Affiliation:
Instituto Astronômico e Geofísico, USP, São Paulo, Brazil
Marcella Contini
Affiliation:
School of Physics and Astronomy, Tel-Aviv University, Ramat-Aviv, Tel-Aviv, Israel

Abstract

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The presence of shocked regions in the narrow-line region (NLR) of active galactic nuclei (AGN) is discussed. Their effect on the physical conditions, in addition to photoionization from the central radiation source, is analyzed. We show that composite models, accounting for both shocks and photoionization, provide a consistent picture of the NLR which accounts for the observed emission-line and continuum spectra and is in agreement with the AGN unified model. The study of a particular object, NGC 5252, strengthens these results. It also shows that, besides explaining the observational data, the models make predictions that can be tested by infrared, optical, and X-ray imaging.

Type
VII. Shocks and Photoionization
Information
International Astronomical Union Colloquium , Volume 159: Emission Lines in Active Galaxies: New Methods and Techniques , 1997 , pp. 365 - 377
Copyright
Copyright © Astronomical Society of the Pacific 1997

References

Acosta-Pulido, J., Vila-Vilaro, B., Perez, I., Wilson, A.S., & Tsvetanov, Z. 1996, ApJ, 464, 177.CrossRefGoogle Scholar
Allen, C.W. 1973, Astrophysical Quantities (London: Athlone Press).Google Scholar
Binette, L., Dopita, M.A., & Tuohy, I.R. 1985, ApJ, 297, 476.Google Scholar
Binette, L., Wilson, A.S., & Storchi-Bergmann, T. 1996, A&A, 312, 365.Google Scholar
Busko, I., & Steiner, J.E. 1990, MNRAS, 245, 470.CrossRefGoogle Scholar
Cappi, M., Mihara, T., Matsuoka, M., Brinkmann, W., Prieto, M.A., & Palumbo, G.G., 1995, ApJ, 456, 141.Google Scholar
Carleton, N.P., & Vrtilek, J.M. 1985, ApJ, 294, 106.Google Scholar
Contini, M., & Aldrovandi, S.M.V. 1983, A&A, 127, 15.Google Scholar
Contini, M., & Aldrovandi, S.M.V. 1986, A&A, 168, 41.Google Scholar
Contini, M., Prieto, M.A., & Viegas, S.M. 1996, Proceedings of Science with the Hubble Telescope - II, eds. Benvenuti, P., Machetto, F.D., & Schreier, E.J..Google Scholar
Contini, M., & Viegas-Aldrovandi, S.M. 1989, ApJ, 343, 78.CrossRefGoogle Scholar
Cox, D.P. 1972, ApJ, 178, 142.Google Scholar
Elvis, M., Fassnacht, C., Wilson, A.S., & Briel, U. 1990, ApJ, 361, 459.CrossRefGoogle Scholar
Ferland, G., & Mushotzky, R. 1984, ApJ, 286, 42.CrossRefGoogle Scholar
Filippenko, A.V. 1985, ApJ, 289, 475.CrossRefGoogle Scholar
Iwasawa, K., Yaqoob, T., Awaki, H., & Ogasaka, Y. 1994, PASJ, 46, L167.Google Scholar
Koski, A.T. 1978, ApJ, 223, 56.Google Scholar
Kotilanien, J.K., & Prieto, M.A. 1995, A&A, 295, 646.Google Scholar
Malkan, M.A. 1983, ApJ, 268, 582.Google Scholar
Marconi, A., Moorwood, A.F.M., & Oliva, E. 1994, A&A, 291, 18.Google Scholar
Morganti, R., Robinson, A., Fosbury, R.A.E., di Seregho Alighieri, S., Tadhunter, C.N., & Mahn, D.F. 1991, MNRAS, 249, 91.CrossRefGoogle Scholar
Oliva, E., Salvati, M., Moorwood, A.F.M., & Marconi, A. 1994, A&A, 288, 457.Google Scholar
Osterbrock, D.E. 1983, IAU Symp. 103 on Planetary Nebulae, ed. Flower, D.R. (Dordrecht: Reidel), 473.Google Scholar
Osterbrock, D.E. 1989, Astrophysics of Gaseous Nebulae and Active Galactic Nuclei (Mill Valley: University Science Books).Google Scholar
Osterbrock, D.E., & Martel, A. 1993, ApJ, 418, 668.Google Scholar
Parker, R.A.R. 1967, ApJ, 149, 363.Google Scholar
Pogge, R.W. 1997, this volume.Google Scholar
Poveda, A., & Woltjer, L. 1968, AJ, 73, 65.Google Scholar
Prieto, M.A., & Freudiing, W. 1996, MNRAS, 279, 63.Google Scholar
Prieto, M.A., Walsh, J., Fosbury, R.A., & di Seregho Alighieri, S. 1993, MN-RAS, 263, 10.Google Scholar
Ptak, A., Yaqoob, T., Serlemitsos, P., Mushotzky, R., & Otani, C. 1994, ApJ, 436, L31.Google Scholar
Seyfert, C. 1943, ApJ, 97, 28.CrossRefGoogle Scholar
Storchi-Bergmann, T., Wilson, A.S., Mulchaey, J.S., & Binette, L. 1996, A&A, 312, 357.Google Scholar
Sutherland, R.S., Bicknell, G.V., & Dopita, M.A. 1993, ApJ, 414, 510.CrossRefGoogle Scholar
Tadhunter, C., & Tsvetanov, Z. 1989, Nature, 341, 42.Google Scholar
Vaceli, M.S., Viegas, S.M., Gruenwald, R., & Benevides-Soares, P. 1993, PASP, 105, 875.Google Scholar
Viegas-Aldrovandi, S.M. 1988, ApJ, 330, L9.Google Scholar
Viegas-Aldrovandi, S.M., & Gruenwald, R.B. 1988, ApJ, 324, 683.Google Scholar
Viegas-Aldrovandi, S.M., & Gruenwald, R.B. 1990, ApJ, 360, 474.Google Scholar
Viegas, S.M., & Contini, M. 1994, ApJ, 408, 113.CrossRefGoogle Scholar
Viegas, S.M., & Prieto, M.A. 1992, MNRAS, 258, 483.Google Scholar
Weaver, K., Yaqoob, T., Holt, S., Mushotzky, R., Matsuoka, M., & Yamauchi, M. 1994, 436, L27.Google Scholar
Whittle, M. 1985, MNRAS, 213, 1.Google Scholar
Willner, S.P., Elvis, M., Fabbiano, G., Lawrence, A., & Ward, M.J. 1985, ApJ, 299, 443.CrossRefGoogle Scholar
Wilson, A.S., 1997, this volume.Google Scholar