A dataset provided by the European Space Agency

Obs ID 2319875
Target/Line-of-sight Axis 1 - Towards an S-type radius valley determination (S-valley)
Gaia DR2 ID GAIA DR2 810069697186043264
URL https://cheops.unige.ch/archive_browser/?visit-id=2319875
DOI https://doi.org/10.57780/esa-b5by6lq
Author European Space Agency, Benz
Description of observation
  • Target RA (J2000): 151.807037353516 °
  • Target Dec (J2000): 46.1149787902832 °
  • Gaia GMag: 9.154
  • Programme ID: CH_PR140085
  • Programme Manager: VENTURINI
  • PI of observing programme: Benz
  • Title of programme: Axis 1 - Towards an S-type radius valley determination (S-valley)
  • Abstract: The number of planets orbiting binary stars has notably increased in the past three years thanks to follow-up of Tess Objects of Interest by direct imaging and GAIA. The demographic properties of planets in binaries are only starting to be unveiled. An important question to address for planets around binaries is that of the radius valley, a deficit of exoplanets with 1.5 to 2.0 Earth radii found for planets orbiting single stars. A recent study by Sullivan et al. 2023 reports that no radius valley exists for S-type planets (planets in binaries orbiting only one of the stellar components). The study was performed with a sample of Kepler planets, which suffers from large errors in the planetary radii. In addition, the planets were assumed to orbit the primary star, which adds an additional (and large) source of error in case a planet orbits in reality the secondary star. With this program, we re-address the radius valley question by combining past observational data with new measurements from CHEOPS.
Temporal Coverage 2024-01-13T20:17:58Z / 2024-01-14T10:31:00Z
Version 3.0
Mission Description CHEOPS (Benz et al., https://doi.org/10.1007/s10686-020-09679-4) is a European Space Agency (ESA) mission in partnership with Switzerland with important contributions to the payload and the ground segment from Austria, Belgium, France, Germany, Hungary, Italy, Portugal, Spain, Sweden and the United Kingdom.

The satellite has a single payload comprising an ultra-high precision photometer covering the 330 - 1100 nm wavelength range in a single photometric band. Observations are made as part of the Guaranteed Time Observing Programme that is formulated by the CHEOPS Science Team, and the Guest Observers Programme through which the Community at large can apply for CHEOPS time.
Creator Contact https://www.cosmos.esa.int/web/cheops/contact
Date Published 2025-10-01T12:39:24Z
Keywords CHEOPS, EXOPLANETS, wide-band photometer
Acknowledgements https://www.cosmos.esa.int/web/cheops-guest-observers-programme/publication-guidelines
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Benz et al., 2025, 'Axis 1 - Towards an S-type radius valley determination (S-valley)', 3.0, European Space Agency, https://doi.org/10.57780/esa-b5by6lq