Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Shapovalova, Alla I."'
Autor:
Ilic, Dragana, Shapovalova, Alla I., Popovic, Luka C., Chavushyan, Vahram, Burenkov, Alexander N., Kollatschny, Wolfram, Kovacevic, Andjelka, Marceta-Mandic, Sladjana, Rakic, Nemanja, La Mura, Giovanni, Rafanelli, Piero
Publikováno v:
2017, Frontiers in Astronomy and Space Sciences, 4, 12
We present the results of the long-term optical monitoring campaign of active galactic nuclei (AGN) coordinated by the Special Astrophysical Observatory of the Russian Academy of Science. This campaign has produced a remarkable set of optical spectra
Externí odkaz:
http://arxiv.org/abs/1803.10860
Autor:
Kovacevic, Andjelka B, Perez-Hernandez, Ernesto, Popovic, Luka C., Shapovalova, Alla I., Kollatschny, Wolfram, Ilic, Dragana
A new combined data of 5 well known type 1 AGN are probed with a novel hybrid method in a search for oscillatory behavior. Additional analysis of artificial light curves obtained from the coupled oscillatory models gives confirmation for detected per
Externí odkaz:
http://arxiv.org/abs/1712.00309
Autor:
Rakic, Nemanja, La Mura, Giovanni, Ilic, Dragana, Shapovalova, Alla I., Kollatschny, Wolfram, Rafanelli, Piero, Popovic, Luka C.
Publikováno v:
A&A 603, A49 (2017)
We investigate the intrinsic Baldwin effect (Beff) of the broad H$\alpha$ and H$\beta$ emission lines for six Type 1 active galactic nuclei (AGNs) with different broad line characteristics: two Seyfert 1 (NGC 4151 and NGC 5548), two AGNs with double-
Externí odkaz:
http://arxiv.org/abs/1703.06188
Here we present an in-depth analysis of the periodicity of the continua and broad emission lines of a quasar E1821+643. We applied non-parametric composite models, the linear sum of stationary and non-stationary Gaussian processes, and quantified con
Externí odkaz:
http://arxiv.org/abs/1701.01566
Autor:
Shapovalova, Alla I., Popović, L. C., Chavushyan, V. H., Afanasiev, V. L., Ilić, D., Kovacević, A., Burenkov, A. N., Kollatschny, W., Spiridonova, O., Valdes, J. R., Bochkarev, N. G., Patino-Alvarez, V., Carrasco, L., Zhdanova, V. E.
We present the results of the long-term (20-year period, from 1996 to 2015) optical spectral monitoring of the Seyfert 1 galaxy NGC 7469. The variation in the light-curves of the broad He II {\lambda}4686A H{\beta} and H{\alpha} lines, and the contin
Externí odkaz:
http://arxiv.org/abs/1701.01490
Autor:
Kovacevic, Andjelka, Popovic, Luka C., Shapovalova, Alla I., Ilic, Dragana, Burenkov, Aleksandr N., Chavushyan, Vahram H.
Here we investigate light curves of the continuum and emission lines of five type 1 active galactic nuclei (AGN) from our monitoring campaign, to test time-evolution of their time delays.Using both modeled and observed AGN light curves we apply Gauss
Externí odkaz:
http://arxiv.org/abs/1511.07119
Autor:
Arshakian, Tigran G., Lobanov, Andrei P., Chavushyan, Vahram H., Shapovalova, Alla I., Zensus, J. Anton
We present observational evidence for the link between variability of the radio emission of the relativistic jet and optical continuum emission in the radio galaxy 3C 390.3 which indicates that the source of variable non-thermal continuum radiation i
Externí odkaz:
http://arxiv.org/abs/astro-ph/0602016
Autor:
Arshakian, Tigran G., Lobanov, Andrei P., Chavushyan, Vahram H., Shapovalova, Alla I., Zensus, J. Anton
The ``central engine'' of AGN is thought to be powered by accretion on a central nucleus believed to be a super-massive black hole. The localization and exact mechanism of the energy release in AGN are still not well understood. We present observatio
Externí odkaz:
http://arxiv.org/abs/astro-ph/0512393
One of the characteristics of NLSy1 optical spectra is the narrower broad lines (FWHM~2000 km/s) and presence of strong Fe II lines around Hbeta. Additionally, very often, Hbeta and Halpha broad lines show Lorentzian like profile, that can indicate s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1baf75e621d1a39bd7f45825fe81b823
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