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Variability of the Emission-Line Spectrum of the Nucleus of the Seyfert Galaxy NGC 7469

Published online by Cambridge University Press:  14 August 2015

I. I. Pronik
I. I. Pronik*
Affiliation:
Crimean Astrophysical Observatory, Nauchny, U.S.S.R.

Abstract

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It is shown that the emission lines of the NGC 7469 nucleus spectrum are variable. Time variability of hydrogen lines is less than 20 days. The Hα emission line is at the profile base about a factor of two narrower than the Hγ line. Estimation of the density of hydrogen envelope, where Balmer lines wings were emitted, gives the value of about 108–109 cm−3.

Type
Part 11 / Variable Quasi-Stellar Objects and Nuclei of Galaxies
Information
Symposium - International Astronomical Union , Volume 67: Variable Stars and Stellar Evolution , 1975 , pp. 605 - 609
Copyright
Copyright © Reidel 1975 

References

Anderson, K. S.: 1970, Astrophys. J. 162, 743.Google Scholar
Anderson, K. S.: 1971, Astrophys. J. 162, 449.CrossRefGoogle Scholar
Andrillat, Y. and Souffrin, S.: 1968, Astrophys. Letters 1, 111.Google Scholar
Boyarchuk, A.: 1966, Izv. Krymsk. Astrofiz. Obs. 25, 45.Google Scholar
Cherepashchuk, A. and Lyuty, V.: 1973, Astrophys. Letters 13, 165.Google Scholar
Dibay, E. and Pronik, V.: 1967, Astron. Zh. 44, 952.Google Scholar
Gershberg, R.: 1974, Izv. Krymsk. Astrofiz. Obs. 50, 122.Google Scholar
Khachikian, E. Je. and Weedman, D. W.: 1971, Astrophys. J. 164, L109.CrossRefGoogle Scholar
Lyuty, V.: 1972, Dissertation.Google Scholar
Lyuty, V.: 1974, in press.Google Scholar
Pronik, I.: 1971, Astron. Tsirk. U.S.S.R., No. 663.Google Scholar
Pronik, I.: 1974a, Astron. Zh. 51, 457.Google Scholar
Pronik, I.: 1974b, Astron. Zh., 51, 1204.Google Scholar
Pronik, V. and Chuvaev, K.: 1972, Astrofizika 8, 187.Google Scholar
Seyfert, C.: 1943, Astrophys. J. 97, 195.Google Scholar
Sobolev, V.: 1947, Moving Envelopes of Stars, Leningrad.Google Scholar
Ulrich, M.: 1972, Astrophys. J. 174, 483.Google Scholar
Wampler, E.: 1968, Astrophys. J. 154, L53.Google Scholar
Wampler, E.: 1971, Astrophys. J. 164, 1.Google Scholar