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The flux ratio of the [O iii] λλ5007, 4959 lines in AGN: comparison with theoretical calculations
By taking into account the relativistic corrections to the magnetic dipole operator, the theoretical [O iii] 5006.843/4958.911 line intensity ratio of 2.98 is obtained. In order to check this newExpand
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Long-term variability of the optical spectra of NGC 4151 - II. Evolution of the broad Hα and Hβ emission-line profiles
Aims. We present the results of a long-term monitoring (11 years, between 1996 and 2006) of Hα and Hβ line variations of the active galactic nucleus of NGC 4151. Methods. High quality spectra (S /N >Expand
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The Influence of Gravitational Microlensing on the Broad Emission Lines of Quasars
We discuss the effects of microlensing on the broad emission lines (BELs) of QSOs in the light of recent determinations of the size of the broad-line region (BLR) and its scaling with QSO luminosity.Expand
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Long-term variability of the optical spectra of NGC 4151. I. Light curves and flux correlations
Aims. Results of long-term spectral monitoring of the active galactic nucleus of NGC 4151 are presented (11 years, from 1996 to 2006). Methods. High quality spectra (S /N > 50 in the continuum nearExpand
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Spectral optical monitoring of 3C 390.3 in 1995–2007 - I. Light curves and flux variation in the continuum and broad lines
Context. We present the results of the long-term (1995-2007) spectral monitoring of the broad-line radio galaxy 3C 390.3, a well known AGN with double-peaked broad emission lines, usually assumed toExpand
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Contribution of the disk emission to the broad emission lines in AGNs: Two-component model
We present an investigation of the structure of the emission line region in a sample of 12 single-peaked Active Galactic Nuclei (AGNs). Using the high resolution Hβ and Hα line profiles observed withExpand
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Spectral optical monitoring of a double-peaked emission line AGN Arp 102B Variability of spectral lines and continuum
Context. We present results of long-term (1987‐2010) optical spectral monitoring of the broad-line radio galaxy Arp 102B, a prototype of an active galactic nucleus with double-peaked broad emissionExpand
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Spectral optical monitoring of the double-peaked emission line AGN Arp 102B - II. Variability of the broad line properties
We investigate a long-term (26 years, from 1987 to 2013) variability in the broad spectral line properties of the radio galaxy Arp 102B, an active galaxy with broad double-peaked emission lines. WeExpand
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Super-massive binary black holes and emission lines in active galactic nuclei
Abstract It is now agreed that mergers play an essential role in the evolution of galaxies and therefore that mergers of supermassive black holes (SMBHs) must have been common. We see theExpand
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Balmer Lines as Diagnostics of Physical Conditions in Active Galactic Nuclei Broad Emission Line Regions
Using a well-known method for laboratory plasma diagnostics, the Boltzmann plot, we discuss the physical properties in the broad-line regions (BLRs) of active galactic nuclei (AGNs). We apply theExpand
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