000002697 001__ 2697
000002697 005__ 20160701171709.0
000002697 0247_ $$2DOI$$a10.1051/epjconf/201510106043
000002697 037__ $$aASTROimport-854
000002697 100__ $$aLampens, P.
000002697 245__ $$aInvestigation of the binary fraction among candidate A-F type hybrid stars detected by Kepler
000002697 260__ $$c2015
000002697 520__ $$aWe are currently monitoring up to 40 Kepler candidate δ Scuti-γ Doradus (resp. γ Doradus-δ Scuti) hybrid stars in radial velocity in order to identify the physical cause behind the low frequencies observed in the periodograms based on the ultra-high accuracy Kepler space photometry. The presence of low frequency variability in unevolved or slightly evolved oscillating A/F-type stars can generally be explained in three ways: either 1) the star is an (un)detected binary or multiple system, or 2) the star is a g-mode pulsator (i.e. a genuine hybrid), or 3) the star's atmosphere displays an asymmetric intensity distribution (caused by spots, i.e. chemical anomalies, or by (very) high rotation), which is detected through rotational modulation. Our targets were selected from the globally characterized variable A/F-type stars of the Kepler mission [7]. We observe each star at least 4 times unevenly spread over a time lapse up to 2 months with the HERMES spectrograph [6]. In the case of composite, multiple-lined spectra, these observations also provide the atmospheric properties of each component. Our principal goal is to estimate the fraction of short-period, spectroscopic systems in the sample. 
000002697 700__ $$a Bognár, Z.
000002697 700__ $$a Frémat, Y.
000002697 700__ $$a Sódor, Á.
000002697 700__ $$a Vermeylen, L.
000002697 700__ $$a De Nutte, R.
000002697 700__ $$a Lombaert, R.
000002697 700__ $$a De Cat, P.
000002697 773__ $$c06043$$pEuropean Physical Journal Web of Conferences$$v101$$y2015
000002697 85642 $$ahttp://esoads.eso.org/abs/2015EPJWC.10106043L
000002697 905__ $$apublished in
000002697 980__ $$aNONREF