A survey of exoplanet phase curves with Ariel

Benjamin Charnay*, João M. Mendonça, Laura Kreidberg, Nicolas B. Cowan, Jake Taylor, Taylor J. Bell, Olivier Demangeon, Billy Edwards, Carole A. Haswell, Giuseppe Morello, Lorenzo V. Mugnai, Enzo Pascale, Giovanna Tinetti, Pascal Tremblin, Robert T. Zellem

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The ESA-Ariel mission will include a tier dedicated to exoplanet phase curves corresponding to ∼ 10 % of the science time. We present here the current observing strategy for studying exoplanet phase curves with Ariel. We define science questions, requirements and a list of potential targets. We also estimate the precision of phase curve reconstruction and atmospheric retrieval using simulated phase curves. Based on this work, we found that full-orbit phase variations for 35-40 exoplanets could be observed during the 3.5-yr mission. This statistical sample would provide key constraints on atmospheric dynamics, composition, thermal structure and clouds of warm exoplanets, complementary to the scientific yield from spectroscopic transits/eclipses measurements.

Original languageEnglish
JournalExperimental Astronomy
ISSN0922-6435
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Ariel space mission
  • Atmospheres
  • Exoplanets
  • Phase curves

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