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| Paper: |
The revised CORS method: a test based on synthetic Cepheid models |
| Volume: |
167, Harmonizing Cosmic Distance Scales in a Post-Hipparcos Era |
| Page: |
304 |
| Authors: |
Ripepi, V.; Marconi, M.; Russo, G.; Bono, G. |
| Abstract: |
Numerical experiments were performed to test the accuracy of Cepheid radii obtained by adopting both the pure Baade-Wesselink (BW) method and the revised CORS method. The BW and the revised CORS method were applied to the synthetic light, color and velocity curves predicted by Cepheid full amplitude, nonlinear, convective models. We found that these methods systematically underestimate and overestimate "theoretical" radii if radius determinations are based on synthetic (BVR) and (VJK) bands respectively. At the same time, current simulations suggest that the CORS radii are in very good agreement with "theoretical" radii if the surface brightness is calibrated by adopting a bidimensional fit of atmosphere models which account for both temperature and gravity variations along the pulsation cycle. |
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