59 citations · 69 across the 3 of their papers we have counts for
5 papers
Multiperiodicity, modulations and flip-flops in variable star light curves I. Carrier fit method
J. Pelt, N. Olspert, M. J. Mantere +1
The light curves of variable stars are commonly described using simple trigonometric models, that make use of the assumption that the model parameters are constant in time. This as…
Secular variation of hemispheric phase differences in the solar cycle
N. V. Zolotova, D. I. Ponyavin, R. Arlt +1
We investigate the phase difference of the sunspot cycles in the two hemispheres and compare it with the latitudinal sunspot distribution. If the north-south phase difference exhib…
Doppler images of the RS CVn binary II Pegasi during the years 1994-2002
Lindborg, M., Korpi +8
We publish 16 Doppler imaging temperature maps for the years 1994-2002 of the active RS CVn star II Peg. The six maps from 1999-2002 are based on previously unpublished observation…
Chemical composition of red horizontal branch stars in the thick disk of the Galaxy
G. Tautvaisiene, B. Edvardsson, I. Tuominen +1
High-resolution spectra of 13 core helium-burning stars in the thick disk of the Galaxy have been obtained with the SOFIN spectrograph on the Nordic Optical Telescope to investigat…
Study of FK Comae Berenices. II. Spot evolution from 1994 to 1997
H. Korhonen, S. V. Berdyugina, T. Hackman +2
We present new surface (Doppler) images of the late-type single giant FK Com for June-July 1996, July-August 1996, April 1997 and June 1997. These images are compared with the prev…