17 citations · 52 across the 10 of their papers we have counts for
10 papers
Cyclic Variability in Brightness of the Young Solar Analog BE Ceti
N. I. Bondar', M. M. Katsova
BE Cet is a young solar analog with an age of 0.6 Gyr and a rotation period of 7.655 days. According to chromospheric and photospheric indices, its activity is higher than the sola…
Detection of Optical Flares on the Selected G-M Dwarfs from Long-term Photometric Series
N. I. Bondar', M. M. Katsova, A. A. Shlyapnikov
We have carried out a search for flares from the analysis of light curves for 12 active G, K, and M dwarfs. As sources of data we used ground-based observations in 2000-2020 from t…
Long-Term Activity in Photospheres of Low-Mass Stars with Strong Magnetic Fields
N. I. Bondar', M. M. Katsova
The behavior of the average annual luminosity of K-M dwarfs OU Gem, EQ Vir, V1005 Ori and AU Mic was studied at time intervals of several decades. The main sources of photometric d…
Wavelet analysis of the long-term activity of V833 Tau
R. Stepanov, N. I. Bondar', M. M. Katsova +2
The bulk of available stellar activity observations is frequently checked for the manifestation of signs in comparison with the known characteristic of solar magnetic modulation. T…
Cycles on the Solar-Type Stars and Cooler Dwarfs
N. I. Bondar, M. M. Katsova, M. A. Livshits
Features of the development of activity cycles in the solar-type stars and fast-rotating cool dwarfs have been considered for 65 stars observed in some decades. Cycles with duratio…
Cool spots on the surface of the active giant PZ Mon
Yu. V. Pakhomov, V. I. Shenavrin, N. I. Bondar' +4
Based on the multiband (BVRIJHKL) photometric observations of the active red giant PZ Mon performed for the first time in the winter season of 2017-2018, we have determined the mai…
Search for the cyclic activity on red dwarfs from photometric surveys
N. I. Bondar, M. A. Gorbunov, A. A. Shlyapnikov
Modern databases and rows of observations allow to make progress in study of magnetic activity of solar-type stars and cold dwarfs. Digitizing of wide-filed plates in the large arc…
Long-Term Cyclic Variability of YZ CMi in the Context of Solar and Stellar Physics
N. I. Bondar, M. M. Katsova
Manifestations of activity on the YZ CMi (M4.5Ve) flare star which has a rotation period of 2.77 days and belongs to a group of activity-saturated stars, are considered from long-t…
Spotted surface structure of the active giant PZ Mon
Yu. V. Pakhomov, K. A. Antonyuk, N. I. Bondar' +3
Based on our photometric observations in 2015-2016 and archival photometric data for the active red giant PZ Mon, we have found the main characteristics of the stellar surface: the…
Solar-Type Activity: Epochs of Cycle Formation
M. M. Katsova, N. I. Bondar', M. A. Livshits
The diagram of indices of coronal and chromospheric activity allowed us to reveal stars where solar-type activity appears and regular cycles are forming. Using new consideration of…