Séminaire Exoplanètes / |
| « Predicting Convective blueshift of FGK stars » |
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Shweta Dalal |
| Convective blueshift is the consequence of small-scale convection at the surface of the stars. The stellar surface convection becomes relevant for Earth-twin detections as it exhibits doppler noise on the order of 10-40 cm/s. To improve our ability to detect Earth-like planets around solar type stars (such as in the upcoming Terra Hunting Experiment), we need to better understand these stellar activity signals and the doppler noise induced by them. Here, we present a simple model based on basic equations of stellar structure, with the goal to find a semi-empirical relation for the convective blueshift of F, G and K stars and compute the radial velocity dispersion due to granulation. |
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mardi 6 septembre 2022 - 14:00 Salle du Conseil Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |