103 citations · 191 across the 6 of their papers we have counts for
6 papers
Surface temperature maps for II Peg during 1999-2002
M. Lindborg, M. J. Korpi, I. Tuominen +3
The active RS CVn star II Peg has been spectroscopically monitored for almost 18 years with the SOFIN spectrograph at NOT, La Palma, Spain. In this paper we present five new surfac…
Magnetic Doppler Imaging of Active Stars
O. Kochukhov, N. Piskunov
We present a new implementation of the magnetic Doppler imaging technique, which aims at self-consistent temperature and magnetic mapping of the surface structures in cool active s…
Estimates of the Strouhal number from numerical models of convection
P. J. Käpylä, M. J. Korpi, M. Ossendrijver +1
We determine the Strouhal number (hereafter St), which is essentially a nondimensional measure of the correlation time, from numerical calculations of convection. We use two indepe…
Periodic variations in the colours of the classical T Tauri star RW Aur A
P. P. Petrov, J. Pelt, I. Tuominen
The classical T Tauri star RW Aur A is an irregular variable with a large amplitude in all photometric bands. In an extended series of photometric data we found small-amplitude per…
Surface imaging of HD 199178 (V1794 Cygni)
T. Hackman, L. Jetsu, I. Tuominen
We present surface temperature maps for the FK Comae-type star HD 199178 (V1794 Cygni) calculated from high resolution spectra obtained in 1994 and 1995. The spot pattern evolves,…
Non-axisymmetric accretion on the classical TTS RW Aur A
P. P. Petrov, G. F. Gahm, J. F. Gameiro +5
(Abridged) High-resolution spectroscopic monitoring of RW Aur A was carried out in 1996, 1998 and 1999 with simultaneous B, V photometry. A multicomponent spectrum is revealed with…