Search for the Star-Planet Interaction
| Authors | |
|---|---|
| Year of publication | 2012 |
| Type | Article in Proceedings |
| Conference | From Interacting Binaries to Exoplanets: Essential Modeling Tools, Proceedings of the International Astronomical Union |
| MU Faculty or unit | |
| Citation | |
| Web | http://cdsads.u-strasbg.fr/abs/2012IAUS..282..125K |
| Doi | http://dx.doi.org/10.1017/S1743921311027141 |
| Field | Astronomy and astrophysics |
| Keywords | CaIIK line; exolanet; star planet interaction |
| Description | We analyse the chromospherical activity of stars with extrasolar planets and search for a possible correlation between the equivalent width of the core of the Ca II K line and orbital parameters of the planet. We found statistically significant evidence that the equivalent width of the Ca II K line reversal, which originates in the stellar chromosphere, depends on the orbital period Porb of the exoplanet. Planets orbiting stars with Teff < 5 500 K and with Porb < 20 days generally have much stronger emission than planets at similar temperatures but at longer orbital periods. Porb = 20 days marks a sudden change in behaviour, which might be associated with a qualitative change in the star-planet interaction. |
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