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| Paper: |
VINCI/VLTI Interferometric Observations of Cepheids |
| Volume: |
310, Variable Stars in the Local Group (IAU Colloquium 193) |
| Page: |
520 |
| Authors: |
Nardetto, N.; Kervella, P.; Mourard, D.; Bersier, D.; Coude Du Foresto, V. |
| Abstract: |
We report the angular diameter measurements of seven classical Cepheids, X Sgr, η Aql, W Sgr, ζ Gem, β Dor, Y Oph, and l Car, that we have obtained with the VLT Interferometer Commissioning Instrument, installed at ESO's VLT Interferometer. For four of these stars, η Aql, W Sgr, β Dor, and l Car, we detect the pulsational variation of their angular diameter. This enables us to compute directly their distances using a modified version of the Baade-Wesselink method. For X Sgr, ζ Gem, and Y Oph, we apply a hybrid method that makes use of published estimates of their linear diameters to derive their distances. |
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