000002885 001__ 2885
000002885 005__ 20160701171712.0
000002885 0247_ $$2DOI$$a10.1063/1.3246541
000002885 037__ $$aASTROimport-1042
000002885 100__ $$aLampens, P.
000002885 245__ $$aTowards Accurate Component Properties of the Hyades Binary θ2 Tauri
000002885 260__ $$c2009
000002885 520__ $$aThe fortunate combination of a pulsating star in a binary system, for which independent constraints on the system's geometry and on the physical properties of the components can be derived, represents a fantastic opportunity for progress in stellar evolution and pulsation modelling. We selected the detached, ``single-lined'' Hyades binary θ2 Tau comprising two mid-A type stars for a detailed spectroscopic investigation of old as well as of new high-resolution échelle spectra. Its brighter component is a well-known δ Scuti star which shows a complex pattern of pulsations. The secondary component is also located in the lower Cepheid instability strip and a potential δ Scuti star. Notwithstanding the heavily blended lines in the observed composite spectra caused by the fast rotation of the secondary component, which previously impeded an accurate determination of the mass ratio of this system, we obtained the component spectra and the components' radial velocities associated to a new spectroscopic orbit using a spectra disentangling algorithm. Combining both spectroscopy and long-baseline optical interferometry, we were able to derive the orbital parallax and the component masses with unprecedented accuracy. The future perspectives of this work are (i) a confrontation of stellar evolution models for the Hyades cluster (both stars are located in the turn-off region of the cluster) (ii) an accurate determination of the chemical composition of two Hyades members and (iii) a more reliable pulsation modelling for the pulsating component(s). 
000002885 700__ $$a Torres, K.
000002885 700__ $$a Frémat, Y.
000002885 700__ $$a Hensberge, H.
000002885 773__ $$c446-448$$pAmerican Institute of Physics Conference Series$$v1170$$y2009
000002885 85642 $$ahttp://esoads.eso.org/abs/2009AIPC.1170..446L
000002885 905__ $$apublished in
000002885 980__ $$aNONREF