CoRoT 102699796, the first metal-poor Herbig Ae pulsator: a hybrid delta Sct-gamma Dor variable? - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2011

CoRoT 102699796, the first metal-poor Herbig Ae pulsator: a hybrid delta Sct-gamma Dor variable?

Résumé

We present the analysis of the time series observations of CoRoT 102699796 obtained by the Convection, Rotation and planetary Transits (CoRoT) satellite that show the presence of five independent oscillation frequencies in the range 3.6-5 c d-1. Using spectra acquired with FLAMES@VLT, we derive the following stellar parameters: spectral type F1V, Teff= 7000 ± 200 K, log (g) = 3.8 ± 0.4, [M/H]=-1.1 ± 0.2, v sin i= 50 ± 5 km s-1, L/L&sun;= 21+21- 11. Thus, for the first time we report the existence of a metal-poor, intermediate-mass pre-main-sequence (PMS) pulsating star. Ground-based and satellite data are used to derive the spectral energy distribution (SED) of CoRoT 102699796 extending from the optical to mid-infrared wavelengths. The SED shows a significant IR excess at wavelengths greater than ˜5 mum. We conclude that CoRoT 102699796 is a young Herbig Ae (F1Ve) star with a transitional disc likely associated with the H II region [FT96]213.1-2.2.

Dates et versions

hal-03786421 , version 1 (23-09-2022)

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V. Ripepi, F. Cusano, M. Di Criscienzo, G. Catanzaro, F. Palla, et al.. CoRoT 102699796, the first metal-poor Herbig Ae pulsator: a hybrid delta Sct-gamma Dor variable?. Monthly Notices of the Royal Astronomical Society, 2011, 416, pp.1535-1545. ⟨10.1111/j.1365-2966.2011.19165.x⟩. ⟨hal-03786421⟩
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