Search Publications

A Search for Low-amplitude Periodic Brightness Variations in HD 168 443

Bondar', N. I.; Shlyapnikov, A. A.

The paper presents the results of studying light curves of the star HD 168443 obtained from the ground-based and space photometric observations within the ASAS, KWS surveys, and the Hipparcos mission from 1990 to 2020. During 30 years of observations, the average annual brightness of the star remained constant within the measurement errors, the me…

A Search for Low-amplitude Periodic Brightness Variations in HD 168 443

Bondar', N. I.; Shlyapnikov, A. A.

The paper presents the results of studying light curves of the star HD 168443 obtained from the ground-based and space photometric observations within the ASAS, KWS surveys, and the Hipparcos mission from 1990 to 2020. During 30 years of observations, the average annual brightness of the star remained constant within the measurement errors, the me…

Long-term Activity in Photospheres of Low-mass Stars with Strong Magnetic Fields

Bondar', N. I.; Katsova, M. M.

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 data for 1989–2019 were the Hipparcos, ASAS, KWS databases. An analysis of long-term series showed that the average annual brightness of all stars varies cyclical. The du…