416 citations · 594 across the 13 of their papers we have counts for
10 papers · 1 filter
Mass outflow from the symbiotic binary RS Oph during its 2021 outburst
N. A. Tomov, M. T. Tomova, K. A. Stoyanov +7
RS Oph is a symbiotic recurrent nova containing a massive white dwarf with heavy mass loss during activity. In August 2021, it underwent its seventh optical eruption since the end…
For optical flickering in symbiotic star MWC 560
Dragomir Marchev, Kiril Stoyanov, Vladislav Marchev +5
This study is based on observations of MWC560 during the last two observational seasons (2020/2021 and 2021/2022). Other than looking for flickering we were interested in following…
The hidden symbiotic star SU Lyn -- detection of flickering in U band
R. K. Zamanov, A. Kostov, M. Moyseev +18
We report photometric observations of the hidden symbiotic star SU Lyn in the optical bands. In five nights we detect a weak flickering in U band with amplitude of about 0.05 magni…
H-alpha spectroscopy of the recurrent nova RS Oph during the 2021 outburst
R. K. Zamanov, K. A. Stoyanov, Y. M. Nikolov +3
We report spectroscopic observations of the emission line of the recurrent nova RS~Oph obtained between 12 and 23 August 2021 during the recent outburst. On the basis of the s…
Physical parameters of close binary systems: VIII
K. Gazeas, S. Zola, A. Liakos +13
This paper presents the results of a combined spectroscopic and photometric study of 20 contact binary systems: HV Aqr, OO Aql, FI Boo, TX Cnc, OT Cnc, EE Cet, RWCom, KR Com, V401…
International observational campaign of the 2014 eclipse of EE Cep
D. Pieńkowski, C. Gałan, T. Tomov +64
Context. EE Cep is one of few eclipsing binary systems with a dark, dusty disk around an invisible object similar to ε Aur. The system is characterized by grey and asymmetric eclip…