87 citations · 897 across the 36 of their papers we have counts for
5 papers · 2 filters
Spot activity of the RS CVn star σ Geminorum
P. Kajatkari, T. Hackman, L. Jetsu +2
We model the photometry of RS CVn star Geminorum to obtain new information on the changes of the surface starspot distribution, i.e., activity cycles, differential rotation and…
Periodicity in some light curves of the solar analogue V352 CMa
P. Kajatkari, L. Jetsu, E. Cole +8
Our aim was to study the light curve periodicity of the solar analogue V352 CMa and in particular show that the presence or absence of periodicity in low amplitude light curves can…
Multiperiodicity, modulations and flip-flops in variable star light curves II. Analysis of II Peg photometry during 1979-2010
Marjaana Lindborg, Maarit J. Mantere, Nigul Olspert +5
According to earlier Doppler images of the magnetically active primary giant component of the RS CVn binary II Peg, the surface of the star was dominated by one single active longi…
Chemical surface inhomogeneities in late B-type stars with Hg and Mn peculiarity I Spot evolution in HD 11753 on short and long time scales
H. Korhonen, J. F. Gonzalez, M. Briquet +7
Aims: Time series of high-resolution spectra of the late B-type star HD 11753 exhibiting HgMn chemical peculiarity are used to study the surface distribution of different chemical…
Magnetic field topology of the RS CVn star II Pegasi
O. Kochukhov, M. J. Mantere, T. Hackman +1
The dynamo processes in cool active stars generate complex magnetic fields responsible for prominent surface stellar activity and variability at different time scales. For a small…