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Influence of stellar variability on the determination of the radius during a transit of an exoplanet

  • Sorbonne Université

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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.

Original languageEnglish
Title of host publicationResearch, Science and Technology of Brown Dwarfs and Exoplanets
Subtitle of host publicationProceedings of an International Conference Held in Shangai on Occasion of a Total Eclipse of the Sun
EditorsWeipeng Lin, Eduardo L. Martin, Eduardo L. Martin, Jian Ge
PublisherEDP Sciences
ISBN (Electronic)9782759806645
DOIs
Publication statusPublished - 18 Jul 2011
EventInternational Conference Held in Shangai on Occasion of a Total Eclipse of the Sun - Shanghai, China
Duration: 20 Jul 200924 Jul 2009

Publication series

NameEPJ Web of Conferences
Volume16
ISSN (Print)2101-6275
ISSN (Electronic)2100-014X

Conference

ConferenceInternational Conference Held in Shangai on Occasion of a Total Eclipse of the Sun
Country/TerritoryChina
CityShanghai
Period20/07/0924/07/09

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