Objectives Determination of angular diameter Application of previous determinations Focus on exoplanet host stars throughout HR diagram to PLATO targets and detected binaries 2021 2024 2027 Start of the CHARA-SPICA survey PLATO fielDs are known First PLATO data Sample - COROT, SONG and TESS observable targets - Extension of the CHARA-SPICA sample to PLATO targets - Core sample focused on F, G, K IV-V stars - Follow-up detected binaries - Extension to giants and earlier types - Explore various metallicities ProviDe R anD T for preparation pipeline eff Binary : mass ratio Binary detection: raDii of components Precise anD accurate Teff anD q SBCR - FLAG (CHARA-SPICA anD GAIA complementarity in separation) MethoDs Calibration of seismic scale relation - RaDius of the component(s) SESSION 1 &2 : Objectives and methods Objectives Determination of angular diameter throughout HR diagram 2021 2024 2027 Start of the CHARA-SPICA survey PLATO fields are known First PLATO data Teff usually determined from spectrophotometry or spectroscopy, - seismic modellinG requires mass, radius and T eff dependent on model atmospheres (precise but not accurate) - provide q as « model independent » observable - derive R from q and p except for limb darkening - derive Teff from bolometric luminosity and q watch out for extinction - improvement of SBCR calibration - … to be used on stars with no direct q measurement - use determinations of radius and Teff in… SESSION 1 &2 : Objectives and methods Objectives Determination of angular diameter throughout HR diagram 2021 2024 2027 Start of the CHARA-SPICA survey PLATO fields are known First PLATO data - seismic modellinG requires mass, radius and Teff - extend tarGet sample with PLATO tarGets - provide q as « model independent » observable - derive R from q and p - derive Teff and q for tarGets that are briGht enouGh - derive Teff from bolometric luminosity and q - apply improved SBCR to fainter PLATO tarGets - improvement of SBCR calibration - insert newly determined parameters into PLATO database - … to be used on stars with no direct q measurement - use Gaia, spectro, CHARA/SPICA data to produce models - identify new multiple stars (complementary to Gaia) à flaG - measure radii of components - estimate mass ratios from orbital elements (need multiple visits) - use determinations of radius and Teff in… SESSION 1 &2 : Objectives and methods Objectives Determination of angular diameter throughout HR diagram 2021 2024 2027 Start of the CHARA-SPICA survey PLATO fields are known First PLATO data - extend tarGet sample with PLATO tarGets - seismic modellinG requires mass, radius and Teff - focus on exoplanet hosts - provide q as « model independent » observable - derive Teff and q for tarGets that are briGht enouGh - derive R from q and p - apply improved SBCR to fainter PLATO tarGets and detected binaries - derive Teff from bolometric luminosity and q - insert newly determined parameters into PLATO database - use Gaia, spectro, CHARA/SPICA data to produce models - improvement of SBCR calibration - … to be used on stars with no direct q measurement - identify new multiple stars (complementary to Gaia) à flaG - measure radii of components - estimate mass ratios from orbital elements (need multiple visits) - use determinations of radius and Teff in….