Volume 440, Number 3, September IV 2005
|Page(s)||1161 - 1165|
|Published online||05 September 2005|
Photometric observations from theoretical flip-flop models
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14882 Potsdam, Germany e-mail: [hkorhonen;delstner]@aip.de
Accepted: 9 June 2005
Some active stars show a so-called flip-flop phenomenon in which the main spot activity periodically switches between two active longitudes that are 180° apart. In this paper we study the flip-flop phenomenon by converting results from dynamo calculations into long-term synthetic photometric observations, which are then compared to the real stellar observations. We show that similar activity patterns as obtained from flip-flop dynamo calculations, can also be seen in the observations. The long-term light-curve behaviour seen in the synthesised data can be used for finding new stars exhibiting the flip-flop phenomenon.
Key words: magnetic fields / magnetohydrodynamics (MHD) / stars: late-type / starspots
© ESO, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.