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Observational calibration of the projection factor of Cepheids II. Application to nine Cepheids with HST/FGS parallax measurements
Context. The distance to pulsating stars is classically estimated using the parallax-of-pulsation (PoP) method, which combines spectroscopic radial velocity (RV) measurements and angular diameter (AD) estimates to derive the distance of the star. A particularly important application of this method is the determination of Cepheid distances in view of the …