| Issue |
EPJ Web of Conferences
Volume 16, 2011
Research, Science and Technology of Brown Dwarfs and Exoplanets: Proceedings of an International Conference held in Shangai on Occasion of a Total Eclipse of the Sun
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|
|---|---|---|
| Article Number | 04002 | |
| Number of page(s) | 2 | |
| Section | Brown Dwarf and Planet Characterization | |
| DOI | https://doi.org/10.1051/epjconf/20111604002 | |
| Published online | 18 July 2011 | |
https://doi.org/10.1051/epjconf/20111604002
Influence of stellar variability on the determination of the radius during a transit of an exoplanet
UPMC Univ. Paris 06, UMR 7095, Institut d’Astrophysique de Paris, 75014 Paris, France
Stellar variability can affect the estimate of an exoplanet radius measured during a transit. We developed a transit light curve model which includes stellar spots. It appears that, if spectro-photometric technique is used, spots and faculae have to be considered to conclude on atmospheric detection and characterization. When using a model including spots, characterization of Hot-Jupiter atmosphere around active stars is possible with this technique, provided a signal to noise ratio up to 105. For Earth-size planets a long-term parallel photometric follow up monitoring the stellar activity is required to compensate the error due to the stellar variability.
© Owned by the authors, published by EDP Sciences, 2011
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