52 citations · 188 across the 11 of their papers we have counts for
8 papers · 1 filter
Time-series Doppler imaging of the red giant HD 208472. Active longitudes and differential rotation
O. Özdarcan, T. A. Carroll, A. Künstler +4
HD 208472 is among the most active RS~CVn binaries with cool starspots. Decade-long photometry has shown that the spots seem to change their longitudinal appearance with a period o…
V1135 Herculis: a double-lined eclipsing binary with an Anomalous Cepheid
E. Sipahi, C. Ibanoglu, O. Cakirli +2
BVR light curves and radial velocities for the double-lined eclipsing binary V1135\,Her were obtained. The brighter component of V1135\,Her is a Cepheid variable with a pulsation p…
TYC 1031 1262 1: An Anomalous Cepheid in a double-lined eclipsing binary
E. Sipahi, C. Ibanoglu, O. Cakirli +1
Multi-color light curves and radial velocities for TYC\,1031\,1262\,1 have been obtained and analyzed. TYC\,1031\,1262\,1 includes a Cepheid with a period of 4.152700.00061 da…
The Patterns of High-Level Magnetic Activity Occurring on the Surface of V1285 Aql: The OPEA Model of Flares and DFT Models of Stellar Spots
H. A. Dal, S. Evren
Statistically analyzing Johnson UBVR observations of V1285 Aql during the three observing seasons, both activity level and behavior of the star are discussed in respect to obtained…
Saturation Levels for White-light Flares of Flare Stars: Variation of Minimum Flare Duration for Saturation
H. A. Dal, S. Evren
Taking into account results obtained from models and from statistical analyses of obtained parameters, we discuss flare activity levels and flare characteristics of five UV Ceti st…
Rotation Modulations and Distributions of the Flare Occurrence Rates on the Surface of Five UV Ceti Type Stars
H. A. Dal, S. Evren
In this study, we considered stellar spots, stellar flares, and also the relation between these two magnetic proccesses that take place on UV Cet stars. In addition, the hypothesis…