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| Paper: |
Investigating Stellar Activity with CoRoT Observations |
| Volume: |
462, Progress in Solar/Stellar Physics with Helio- and Asteroseismology |
| Page: |
326 |
| Authors: |
Mathur, S.; Salabert, D.; García, R. A.; Régulo, C.; Ballot, J.; Metcalfe, T. S. |
| Abstract: |
The recent study of the CoRoT target HD 49933 found evidence of variability
in its magnetic activity.
This was the first time that stellar activity had been detected
using asteroseismic data. For the Sun and HD 49933, we observe an increase of the p-mode frequencies and a decrease of the maximum amplitude per radial mode when the activity level is higher.
Moreover a similar behavior of the frequency shifts with frequency has been found for the Sun and HD 49933.
We study three other CoRoT targets, for which modes have been detected and well identified:
HD 181420, HD 49385, and HD 52265 (which is hosting a planet).
We report on how the seismic parameters (frequency shifts and amplitude) vary during the observation of these stars. |
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