Zobrazeno 1 - 10
of 763
pro vyhledávání: '"Popovic, L."'
Autor:
Komossa, S., Grupe, D., Marziani, P., Popovic, L. C., Marceta-Mandic, S., Bon, E., Ilic, D., Kovacevic, A. B., Kraus, A., Haiman, Z., Petrecca, V., De Cicco, D., Dimitrijevic, M. S., Sreckovic, V. A., Dojcinovic, J. Kovacevic, Pannikkote, M., Bon, N., Gupta, K. K., Iacob, F.
The extremes of Active Galactic Nuclei (AGN) variability offer valuable new insights into the drivers and physics of AGN. We discuss some of the most extreme cases of AGN variability; the highest amplitudes, deep minima states, extreme spectral state
Externí odkaz:
http://arxiv.org/abs/2408.00089
In this paper, we study and compare the optical and X-ray counterparts of subparsec supermassive black hole binaries (SMBHBs). With that aim, we simulated the profiles of optical spectral lines emitted from the broad line region (BLR) as well as X-ra
Externí odkaz:
http://arxiv.org/abs/2407.18871
We discuss the polarization of broad emission lines in the type 1 active galactic nuclei (AGNs). The polarization depends on the geometry of the broad line region (BLR), and also on the polarization mechanism, or distribution of the scattering materi
Externí odkaz:
http://arxiv.org/abs/2111.06237
The perfect case for time-domain investigations are active galactic nuclei (AGNs) since they are luminous objects that show strong variability. Key result from the studies of AGNs variability is the estimated mass of a supermassive black hole (SMBH),
Externí odkaz:
http://arxiv.org/abs/2105.01515
Publikováno v:
A&A 647, A98 (2021)
We present new spectroscopic and polarimetric observations of the first discovered gravitational lens Q0957+561 obtained with the 6m telescope of the Special Astrophysical Observatory (SAO, Russia). We explore spectropolarimetric parameters of Q0957+
Externí odkaz:
http://arxiv.org/abs/2101.07154
Autor:
Ilic, D., Oknyansky, V., Popovic, L. C., Tsygankov, S. S., Belinski, A. A., Tatarnikov, A. M., Dodin, A. V., Shatsky, N. I., Ikonnikova, N. P., Rakic, N., Kovacevic, A., Marceta-Mandic, S., Burlak, M. A., Mishin, E. O., Metlova, N. V., Potanin, S. A., Zheltoukhov, S. G.
Publikováno v:
A&A 638, A13 (2020)
We present observations from the short-term intensive optical campaign (from Sep2019 to Jan2020) of the changing-look Seyfert NGC 3516. This active galactic nucleus is known to have strong optical variability and has changed its type in the past. It
Externí odkaz:
http://arxiv.org/abs/2004.01308
Here we give an observational method for measurements of the equatorial scattering region radius using variability in the polarized broad lines in Type 1 active galactic nuclei (AGNs). The polarization in broad lines of Type 1 AGNs is mostly caused b
Externí odkaz:
http://arxiv.org/abs/2003.12809
Autor:
Patiño-Ávarez, V. M., Torrealba, J., Chavushyan, V., Cruz-González, I., Arshakian, T., León-Tavares, J., Popović, L. Č.
Publikováno v:
Front. Astron. Space Sci. (FrASS) 3:19 (2016)
We study the Baldwin Effect (BE) in 96 core-jet blazars with optical and ultraviolet spectroscopic data from a radio-loud AGN sample obtained from the MOJAVE 2 cm survey. A statistical analysis is presented of the equivalent widths ($W_{\lambda}$) of
Externí odkaz:
http://arxiv.org/abs/2001.08784
Autor:
Popović, L. Č., Afanasiev, V. L., Moiseev, A., Smirnova, A., Simić, S., Savić, Dj., Mediavilla, E. G., Fian, C.
Publikováno v:
A&A 634, A27 (2020)
We present new spectroscopic and polarimetric observations of the gravitational lens SDSS J1004+4112 taken with the 6m telescope of the Special Astrophysical Observatory (SAO, Russia). In order to explain the variability that is observed only in the
Externí odkaz:
http://arxiv.org/abs/1912.08886
Here we study the potential observational signatures of supermassive black hole binaries (SMBHBs) in the Fe K$\alpha$ line profiles emitted from the accretion disks around their components. We simulated the Fe K$\alpha$ line emission from the relativ
Externí odkaz:
http://arxiv.org/abs/1911.01164