Abstract
We present an analysis of the reported spectral features of NGC 4151 in X-rays. It is shown that the origin of X-rays from the source is inconsistent with a single production mechanism. We suggest a new two-component model in which soft X-rays arise from the black-body emission of a tiny hot nucleus withT∼2×107 K and the hard X-ray photons are generated in an extended region by inverse Compton scattering of electrons with the infrared photons.
This is a preview of subscription content, log in via an institution to check access.
References
Auriemma, G., Angeloni, L., Belli, B. M., Bernardi, A., Cardini, D., Costa, E., Emanuele, A., Giovannelli, F., and Ubertini, P.: 1977, preprint.
Baity, W. A., Jones, T. W., Weaton, W. A., and Peterson, L. E.: 1975,Astrophys. J. 199, L5.
Bergeron, J. and Salpeter, E. E.: 1973,Astron. Astrophys. 22, 385.
Bosma, A., Ekers, R. D., and Lequeuse, J.: 1977,Astron. Astrophys. 57, 97.
Burbidge, G. R.: 1972,IAU Symposium, No. 55, p. 199.
De Bruyn, A. G. and Willis, A. G.: 1974,Astron. Astrophys. 23, 351.
Elvis, M.: 1976,Monthly Notices Roy. Astron. Soc. 177, 7P.
Gursky, H., Kellogg, E. M., Leong, C., Tananbaum, H., and Giacconi, R.: 1971,Astrophys. J. 165, L43.
Ives, J. C., Sanford, P. J., and Penston, M. V.: 1976,Astrophys. J. 207, L159.
Kemp, J. C., Rickie, J. H., Lebofsky, M. J., and Coyne, G. V.: 1977,Astrophys. J. 215, L107.
Low, F. J. and Kleinmann, D. E.: 1968,Astron. J. 73, 858.
Margon, B., Lampton, M., Boyer, S. and Cruddace, R.: 1975,Astrophys. J. 197, 25.
Oke, J. B. and Sargent, Wallace, L. W.: 1968,Astrophys. J. 151, 807.
Osterbrock, D.: 1971, in D. J. K. Connell (ed.),The Nuclei of Galaxies North Holland Publishing Co.
Paciesas, W. S., Mushotzky, R. F., and Pelling, R. M.: 1977,Monthly Notices Roy. Astron. Soc. 178, 23P.
Rickie, G. H. and Low, F. J.: 1972,Astrophys. J. 176, L95.
Rickie, G. H. and Low, F. J.: 1975,Astrophys. J. 200, L67.
Sargent, Wallace, L. W.: 1972,IAU Symposium, No. 55, 184. See also-Proceedings of the Conference on Seyfert Galaxies and Related Topics: 1968,Astron. J. 73, 836.
Schwarzschild, M.: 1973,Astrophys. J. 182, 357.
Ulrich, M. H.: 1973,Astrophys. J. 181, 51.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Manchanda, R.K., Costa, E., Belli, B.M. et al. A new model for X-ray emission from NGC 4151. Astrophys Space Sci 53, 231–239 (1978). https://doi.org/10.1007/BF00645918
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00645918