A dataset provided by the European Space Agency

Obs ID 2578896
Target/Line-of-sight Measuring precise masses and radii of two key young exoplanets in the same system
Gaia DR2 ID Gaia DR2 2974906868489280768
URL https://cheops.unige.ch/archive_browser/?visit-id=2578896
DOI https://doi.org/10.57780/esa-c5ltztq
Author European Space Agency, Hritam chakraborty
Description of observation
  • Target RA (J2000): 76.649543762207 °
  • Target Dec (J2000): -20.2455902099609 °
  • Gaia GMag: 11.63
  • Programme ID: CH_PR250026
  • PI of observing programme: Hritam chakraborty
  • Title of programme: Measuring precise masses and radii of two key young exoplanets in the same system
  • Abstract: Young planets are excellent laboratories to test planet formation and evolution pathways. However, the accurate characterisation of parameters like the masses and radii is limited by the enhanced activity of the host star. However, the timing of individual transits is far less affected by the stellar activity. Thus, transit timing variations arising due to dynamical interactions provide a unique opportunity to measure precise masses of young exoplanets. Here we propose to characterise the TOI-942 system, a ~50-Myr-old star, hosting two Neptune-sized planets orbiting at periods of 4.32 and 10.16 days. We aim to i) constrain the precise masses of these planets by measuring their transit timing variations ii) quantify the variations in transit depth associated with stellar activity and use this information to derive accurate radii of both planets. To do this, we propose to carry out time-constrained transit observations of planets b and c, coupled with non-time-constrained monitoring of the star to better constrain the stellar activity levels. This synergy will allow us to derive both precise masses and radii of this key young exoplanetary system, making it the youngest well-characterised system of Neptune-sized planets to date.
Temporal Coverage 2024-11-03T13:47:58Z / 2024-11-03T17:06:00Z
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 2024-12-19T02:02:41Z
Keywords CHEOPS exoplanet data, ESA CHEOPS mission dataset, exoplanet transit photometry data, high-precision space photometry observations, exoplanet light curves dataset, ultra-high precision stellar photometry, transit depth measurements, exoplanet radius determination data, time-series photometric observations, short-cadence photometry dataset, CHEOPS calibrated level 2 data, aperture photometry space data, stellar variability monitoring data, transiting exoplanet observations, hot Jupiter transit photometry, super-Earth transit data, exoplanet ephemeris refinement observations, phase curve photometry dataset, space-based optical photometry, visible wavelength exoplanet data, FITS light curve files, flux time-series exoplanet data, CHEOPS observation ID dataset, exoplanet follow-up observations, stellar host characterization photometry, ESA CHEOPS science archive data, precision transit timing measurements
Acknowledgements https://www.cosmos.esa.int/web/cheops-guest-observers-programme/publication-guidelines
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Hritam chakraborty et al., 2024, 'Measuring precise masses and radii of two key young exoplanets in the same system', 3.0, European Space Agency, https://doi.org/10.57780/esa-c5ltztq
Rights Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.