73 citations · 206 across the 8 of their papers we have counts for
5 papers · 1 filter
Kinematic frames and "active longitudes": does the Sun have a face?
J. Pelt, J. M. Brooke, M. J. Korpi +1
It has recently been claimed that analysis of Greenwich sunspot data over 120 years reveals that sunspot activity clusters around two longitudes separated by 180 degrees (``active…
Century scale persistence in longitude distribution: in the Sun and in silico
J. Pelt, I. Tuominen, J. Brooke
Using Greenwich sunspot data for 120 years it was recently observed that activity regions on the Sun's surface tend to lie along smoothly changing longitude strips 180 degrees apar…
Local models of stellar convection: Reynolds stresses and turbulent heat transport
P. J. Käpylä, M. J. Korpi, I. Tuominen
We study stellar convection using a local three-dimensional MHD model, with which we investigate the influence of rotation and large-scale magnetic fields on the turbulent momentum…
The first close-up of the "flip-flop" phenomenon in a single star
H. Korhonen, S. V. Berdyugina, K. G. Strassmeier +1
We present temperature maps of the active late-type giant FK Com which exhibit the first imagining record of the ``flip-flop'' phenomenon in a single star. The phenomenon, in which…
Chemical composition of evolved stars in the open cluster M 67
G. Tautvaisiene, B. Edvardsson, I. Tuominen +1
High-resolution spectra of six core helium-burning `clump' stars and three giants in the open cluster M 67 have been obtained with the SOFIN spectrograph on the Nordic Optical Tele…