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- W2034632219 abstract "We present interferometric observations of 7 main-sequence and 3 giant stars with spectral types from B2 to F6 using the PAVO beam combiner at the CHARA array. We have directly determined the angular diameters for these objects with an average precision of 2.3%. We have also computed bolometric fluxes using available photometry in the visible and infrared wavelengths, as well as space-based ultraviolet spectroscopy. Combined with precise textit{Hipparcos} parallaxes, we have derived a set of fundamental stellar properties including linear radius, luminosity and effective temperature. Fitting the latter to computed isochrone models, we have inferred masses and ages of the stars. The effective temperatures obtained are in good agreement (at a 3% level) with nearly-independent temperature estimations from spectroscopy. They validate recent sixth-order polynomial (B-V)-$T_mathrm{eff}$ empirical relations citep{Boyajian2012a}, but suggest that a more conservative third-order solution citep{vanBelle2009} could adequately describe the (V-K)-$T_mathrm{eff}$ relation for main-sequence stars of spectral type A0 and later. Finally, we have compared mass values obtained combining surface gravity with inferred stellar radius (textit{gravity mass}) and as a result of the comparison of computed luminosity and temperature values with stellar evolutionary models (textit{isochrone mass}). The strong discrepancy between isochrone and gravity mass obtained for one of the observed stars, $gamma$,Lyr, suggests that determination of the stellar atmosphere parameters should be revised." @default.
- W2034632219 created "2016-06-24" @default.
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- W2034632219 date "2013-07-09" @default.
- W2034632219 modified "2023-10-15" @default.
- W2034632219 title "Optical interferometry of early-type stars with PAVO@CHARA – I. Fundamental stellar properties" @default.
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- W2034632219 doi "https://doi.org/10.1093/mnras/stt1092" @default.
- W2034632219 hasPublicationYear "2013" @default.
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