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- W4298136877 abstract "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. We use observations presented in Paper I (Shapovalova et al. 2013) in the period from 1987 to 2011, and a new set of observations performed in 2012--2013. To explore the BLR geometry, and clarify some contradictions about the nature of the BLR in Arp 102B we explore variations in the H$alpha$ and H$beta$ line parameters during the monitored period. We fit the broad lines with three broad Gaussian functions finding the positions and intensities of the blue and red peaks in H$alpha$ and H$beta$. Additionally we fit averaged line profiles with the disc model. We find that the broad line profiles are double-peaked and have not been changed significantly in shapes, beside an additional small peak that, from time to time can be seen in the blue part of the H$alpha$ line. The positions of the blue and red peaks { have not changed significantly during the monitored period. The H$beta$ line is broader than H$alpha$ line in the monitored period. The disc model is able to reproduce the H$beta$ and H$alpha$ broad line profiles, however, observed variability in the line parameters are not in a good agreement with the emission disc hypothesis. It seems that the BLR of Arp 102B has a disc-like geometry, but the role of an outflow can also play an important role in observed variation of the broad line properties." @default.
- W4298136877 created "2022-10-01" @default.
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- W4298136877 date "2014-11-28" @default.
- W4298136877 modified "2023-10-13" @default.
- W4298136877 title "Spectral optical monitoring of the double-peaked emission line AGN Arp 102B" @default.
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- W4298136877 doi "https://doi.org/10.1051/0004-6361/201423555" @default.
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