Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2009-08-19
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
10 pages, 9 figures, New Astronomy Reviews (Proceeding of 7th SCSLSA), in press
Scientific paper
Results of a long-term monitoring ($\gtrsim 10$ years) of the broad line and continuum fluxes of three Active Galactic Nuclei (AGN), 3C 390.3, NGC 4151, and NGC 5548, are presented. We analyze the H$\alpha$ and H$\beta$ profile variations during the monitoring period and study different details (as bumps, absorption bands) which can indicate structural changes in the Broad Line Region (BLR). The BLR dimensions are estimated using the time lags between the continuum and the broad lines flux variations. We find that in the case of 3C 390.3 and NGC 5548 a disk geometry can explain both the broad line profiles and their flux variations, while the BLR of NGC 4151 seems more complex and is probably composed of two or three kinematically different regions.
Bochkarev Nikolai G.
Burenkov Alexander N.
Chavushyan Vahram H.
Collin Suzy
Doroshenko V. T.
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