Photometric observations from theoretical flip-flop models

Details Photometric observations from theoretical flip-flop models Photometric observations from theoretical flip-flop models

2005-06-13

arxiv.org/abs/astro-ph/0506267v1

Astronomy and Astrophysics

Astrophysics

5 pages, 5 figures, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20053562

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 degrees 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.

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