TY - JOUR
T1 - Kepler photometry of KIC10661783
T2 - A binary star with total eclipses and δScuti pulsations
AU - Southworth, John
AU - Zima, W.
AU - Aerts, C.
AU - Bruntt, H.
AU - Lehmann, H.
AU - Kim, S. L.
AU - Kurtz, D. W.
AU - Pavlovski, K.
AU - Prša, A.
AU - Smalley, B.
AU - Gilliland, R. L.
AU - Christensen-Dalsgaard, J.
AU - Kawaler, S. D.
AU - Kjeldsen, H.
AU - Cote, M. T.
AU - Tenenbaum, P.
AU - Twicken, J. D.
PY - 2011/7
Y1 - 2011/7
N2 - We present Kepler satellite photometry of KIC10661783, a short-period binary star system which shows total eclipses and multiperiodic δScuti pulsations. A frequency analysis of the eclipse-subtracted light curve reveals at least 68 frequencies, of which 55 or more can be attributed to pulsation modes. The main limitation on this analysis is the frequency resolution within the 27-d short-cadence light curve. Most of the variability signal lies in the frequency range 18-31 d-1, with amplitudes between 0.1 and 4 mmag. One harmonic term (2f) and a few combination frequencies (fi+fj) have been detected. From a plot of the residuals versus orbital phase, we assign the pulsations to the primary star in the system. The pulsations were removed from the short-cadence data and the light curve was modelled using the Wilson-Devinney code. We are unable to get a perfect fit due to the residual effects of pulsations and also to the treatment of reflection and reprocessing in the light-curve model. A model where the secondary star fills its Roche lobe is favoured, which means that KIC10661783 can be classified as an oEA system. Further photometric and spectroscopic observations will allow the masses and radii of the two stars to be measured to high precision and hundreds of δScuti pulsation frequencies to be resolved. This could lead to unique constraints on theoretical models of δScuti stars, if the evolutionary history of KIC10661783 can be accounted for.
AB - We present Kepler satellite photometry of KIC10661783, a short-period binary star system which shows total eclipses and multiperiodic δScuti pulsations. A frequency analysis of the eclipse-subtracted light curve reveals at least 68 frequencies, of which 55 or more can be attributed to pulsation modes. The main limitation on this analysis is the frequency resolution within the 27-d short-cadence light curve. Most of the variability signal lies in the frequency range 18-31 d-1, with amplitudes between 0.1 and 4 mmag. One harmonic term (2f) and a few combination frequencies (fi+fj) have been detected. From a plot of the residuals versus orbital phase, we assign the pulsations to the primary star in the system. The pulsations were removed from the short-cadence data and the light curve was modelled using the Wilson-Devinney code. We are unable to get a perfect fit due to the residual effects of pulsations and also to the treatment of reflection and reprocessing in the light-curve model. A model where the secondary star fills its Roche lobe is favoured, which means that KIC10661783 can be classified as an oEA system. Further photometric and spectroscopic observations will allow the masses and radii of the two stars to be measured to high precision and hundreds of δScuti pulsation frequencies to be resolved. This could lead to unique constraints on theoretical models of δScuti stars, if the evolutionary history of KIC10661783 can be accounted for.
UR - http://www.scopus.com/inward/record.url?scp=79959374402&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79959374402&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2966.2011.18559.x
DO - 10.1111/j.1365-2966.2011.18559.x
M3 - Article
AN - SCOPUS:79959374402
SN - 0035-8711
VL - 414
SP - 2413
EP - 2423
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -