45 citations · 104 across the 8 of their papers we have counts for
8 papers
Interferometric Images of the Starspot Evolution of Andromedae
Rachael M. Roettenbacher, John D. Monnier, Heidi Korhonen +21
The evolution of starspots of the giant primaries of RS CVn systems is typically detected indirectly with photometric and spectroscopic monitoring. These observations suggest slowl…
Characterising the stellar differential rotation based on largest-spot statistics from ground-based photometry
Mikko Tuomi, Jyri J. Lehtinen, Gregory W. Henry +1
Stellar spot distribution has consequences on the observable periodic signals in long-time baseline ground-based photometry. We model the statistics of the dominating spots of two…
Observing the changing surface structures of the active K giant sigma Gem with SONG
H. Korhonen, R. M. Roettenbacher, S. Gu +6
Aims: We aim to study the spot evolution and differential rotation in the magnetically active cool K-type giant star sigma Gem from broadband photometry and continuous spectroscopi…
HST/STIS analysis of the first main sequence pulsar CU Vir
J. Krticka, Z. Mikulasek, G. W. Henry +9
CU Vir has been the first main sequence star that showed regular radio pulses that persist for decades, resembling the radio lighthouse of pulsars and interpreted as auroral radio…
Long-term spot monitoring of the young solar analogue V889 Her
T. Willamo, T. Hackman, J. J. Lehtinen +6
Starspots are important manifestations of stellar magnetic activity. By studying their behaviour in young solar analogues, we can unravel the properties of their magnetic cycles. T…
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…
Surprising variations in the rotation of the chemically peculiar stars CU Virginis and V901 Orionis
Zdenek Mikulasek, Jiri Krticka, Gregory W. Henry +13
CU Vir and V901 Ori belong among these few magnetic chemically peculiar stars whose rotation periods vary on timescales of decades. We aim to study the stability of the periods in…