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PLATO Benchmark stars

Aim of the working group

The aim of this working group is to coordinate and support efforts to measure precise and accurate fundamental properties for stars that can be used to validate and improve data products from the PLATO mission. These benchmarks will be used to calibrate stellar models, to test data analysis techniques, and to demonstrate that the mission can deliver the required accuracy for stellar parameters from asteroseismology (1-2% in radius, 15% in mass and 10% for the age of a G0 star of 1-M, 1-R star with and Teff=6000K).


Members of working group are expected to share information and provide expertise to other members of working group. The following activities are provided as typical examples of the type of information and expertise that might be provided.

  • Contributing text and figures to observing time proposals to study benchmark stars.
  • Helping other working group members to apply for funding to support their work on benchmark stars, e.g., informing them of funding opportunities, commenting on draft proposals, writing letters of support.
  • Sharing target lists or observing logs with other members of working group for the purposes of avoiding duplication of effort. Such information should not be distributed beyond members of the working group without the express permission of the provider.
  • Providing preliminary results, unpublished data, etc. to aid other members of working group in target selection or to optimise their observing strategy.
  • Running simulations, generating models and making calculations that will be used to select or prioritise stars for inclusion in a final sample of benchmark stars.
  • Organising activities that will be used to demonstrate the claimed precision and accuracy of the stellar parameters provided by the working group, e.g., "hare-and-hounds" exercises or conducting multiple independent studies of selected target stars.
  • Orlagh Creevey (WP lead); Observatoire de la Cote d'Azur, Nice, France
  • Pierre Maxted (WP co-lead. Eclipsing binaries); Keele University, UK
  • Jørgen Christensen-Dalsgaard (WP125000 lead. Asteroseismology); Aarhus University, Denmark
  • Remo Collet (WP122200 lead. 3D model stellar atmospheres and spectra); Aarhus University, Denmark
  • Margarida Cunha (WP124000 lead. Asteroseismology); Institute of Astrophysics and Space Sciences, University of Porto, Portugal
  • Guy Davies (Asteroseismology); Birmingham, UK
  • José Dias do Nascimento (Stellar spectroscopy); UFRN, Brazil
  • Sofia Feltzing (WP 125400 lead. Classical determinations of parameters, ages of stars); Lund, Sweden
  • Patrick Gaulme (Solar-like oscillations and eclipsing binaries, WP 38 lead); Max Planck Institute for Solar System Research, Göttingen, Germany
  • Marie-Jo Goupil (WP120 Lead. Asteroseismology); Meudon, France
  • Flavien Kiefer (Astrometric/spectroscopic binary stars) Institut d'Astrophysique de Paris, France
  • Ulrike Heiter (Gaia, high-resolution spectra, M dwarfs, IR spectra); Uppsala, Sweden
  • Dan Huber (Interferometry and asteroseismology, spectrophotometry); Hawaii, USA
  • Thierry Morel (WP 122 lead. Non-seismic diagnostics and stellar parameters); Liege, Belgium
  • Nicolas Nardetto (Interferometry, surface-brightness relations); Nice, France
  • Aldo Serenelli (WP121 lead. Stellar physics and models) Barcelona, Spain
  • John Southworth (Eclipsing binary stars) Keele University, UK
  • Tim White (Interferometry and asteroseismology); ANU, Canberra, Australia