J/ApJ/820/1ivo://CDS.VizieR/J/ApJ/820/1doi:10.26093/cds/vizier.18200001CDSLee J.W.Hong K.Koo J.-R.Park J.-H.2017-07-04T07:08:21Z2016-06-24T12:18:01ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.freclipsing-binary-starsphotometryvariable-starsKIC 9532219 is a W UMa-type eclipsing binary with an orbital period of 0.1981549days that is below the short-period limit (~0.22days) of the period distribution for contact binaries. The Kepler light curve of the system exhibits striking changes in both eclipse depths and light maxima. Applying third-body and spot effects, the light-curve synthesis indicates that the eclipsing pair is currently in a marginal contact stage with a mass ratio of q=1.20, an orbital inclination of i=66.0{deg}, a temperature difference of T_1_-T_2_=172K, and a third light of l_3_=75.9%. To understand the light variations with time, we divided up the light curve into 312 segments and analyzed them separately. The results reveal that variation of eclipse depth is primarily caused by changing amounts of contamination due to the nearby star KIC 9532228 between the Kepler Quarters and that the variable O'Connell effect originates from the starspot activity on the less massive primary component. Based on our light-curve timings, a period study of KIC 9532219 indicates that the orbital period has varied as a combination of a downward parabola and a light-travel-time (LTT) effect due to a third body, which has a period of 1196 days and a minimum mass of 0.0892M_{sun}_ in an orbit of eccentricity 0.150. The parabolic variation could be a small part of a second LTT orbit due to a fourth component in a wider orbit, instead of either mass transfer or angular momentum loss.2016ApJ...820....1Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/820/1CatalogResearchIsServedByTAP VizieR generic servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)J/AJ/149/197 : Minima of 10 Kepler eclipsing binaries (Zasche+, 2015)J/AJ/149/93 : Eclipse timings of KIC 5621294 (Lee+, 2015)J/MNRAS/452/3561 : Kepler eclipsing binary stars. K2 (LaCourse+, 2015)J/MNRAS/437/3473 : Temperatures of Kepler eclipsing binaries (Armstrong+, 2014)J/PASP/126/914 : Kepler eclipsing binary stars. V. (Conroy+, 2014)J/ApJS/211/2 : Revised properties of Q1-16 Kepler targets (Huber+, 2014)J/AJ/148/37 : Long-term photometric behavior of V404 Lyr (Lee+, 2014)J/AJ/147/45 : Kepler mission IV. Close binaries (Conroy+, 2014)J/AJ/144/24 : The Kepler-INT survey (Greiss+, 2012)J/AJ/143/137 : Minima of eclipsing binaries from Kepler (Gies+, 2012)J/AJ/142/160 : Kepler Mission. II. eclipsing binaries (Slawson+, 2011)J/AJ/142/2 : Burrell-Optical-Kepler-Survey (BOKS). I. (Feldmeier+, 2011)J/AJ/141/83 : Eclipsing binaries in Kepler 1st data release (Prsa+, 2011)J/AJ/141/78 : Low-mass eclipsing binaries in KIC (Coughlin+, 2011)J/AJ/138/478 : AR Boo differential BVR photometry (Lee+, 2009)J/AJ/131/2986 : Multiplicity of contact binaries (Pribulla+, 2006)J/A+A/450/681 : Companions to close spectroscopic bin. (Tokovinin+, 2006)http://keplerebs.villanova.edu/ : Kepler eclipsing binaries cataloghttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/820/1https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/820/1http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/820/1https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/820/1https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/820/1http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/820/1GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/820/1/table3Light-curve solutions for the 312 datasets combined at intervals of 20 orbital periodsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Date of observationdtime.epochdoublelambda[53.1/310.8] Longitude of spot centerdegpos.galactic.lonfloatrs[10.7/16] Angular radiusdegphys.angSizefloatTs[0.8/1] Spot temperature factor (1)phys.temperaturefloati[64.6/68] Orbital inclinationdegsrc.orbital.inclinationfloatT1[5158/5225] Primary's effective temperatureKphys.temperature.effectiveintOmega1[4.06/4.09] Primary's potentialstat.fit.paramfloatq[1.19/1.21] Mass ratiophys.massfloatl1[0.10/0.15] Primary's light contributionstat.fit.paramfloatl3[0.7/0.8] Third light contributionstat.fit.paramfloatJ/ApJ/820/1/table1Light levels of KIC 9532219 at four characteristic phasese_maxI[0/0.03] Uncertainty in maxImagstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDMean Barycentric Julian Date of observation (1)dtime.epochdoubleminI[16.17/16.2] Kepler magnitude at phase 0.0magphot.mag;em.optfloate_minI[0/0.03] Uncertainty in minImagstat.errorfloatmaxI[16.1/16.11] Kepler magnitude at phase 0.25magphot.mag;em.optfloatminII[16.16/16.2] Kepler magnitude at phase 0.5magphot.mag;em.optfloate_minII[0/0.03] Uncertainty in minImagstat.errorfloatmaxII[16.1/16.11] Kepler magnitude at phase 0.75magphot.mag;em.optfloate_maxII[0/0.03] Uncertainty in maxIImagstat.errorfloat