HD 49933: A laboratory for magnetic activity cycles

Details HD 49933: A laboratory for magnetic activity cycles HD 49933: A laboratory for magnetic activity cycles

2011-10-03

arxiv.org/abs/1110.0307v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

2 pages, 1 Figure. Proceedings of the second CoRoT symposium

Scientific paper

Seismic analyses of the CoRoT target HD 49933 have revealed a magnetic cycle. Further insight reveals that frequency shifts of oscillation modes vary as a function of frequency, following a similar pattern to that found in the Sun. In this preliminary work, we use seismic constraint to compute structure models of HD 49933 with the Asteroseismic Modeling Portal (AMP) and the CESAM code. We use these models to study the effects of sound-speed perturbations in near surface layers on p-mode frequencies.

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