J/A+A/506/111ivo://CDS.VizieR/J/A+A/506/111doi:10.26093/cds/vizier.35060111CDSDegroote P.Briquet M.Catala C.Uytterhoeven K.Lefever K.Morel T.,Aerts C.Carrier F.Auvergne M.Baglin A.Michel E.2017-06-27T06:38:39Z2009-12-29T14:58:00ZCDS support team

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

cds-question@unistra.frvariable-starsearly-type-starsWe present the CoRoT light curve of the beta Cep star HD 180642, assembled during the first long run of the space mission, as well as archival single-band photometry. Our goal is to analyse the detailed behaviour present in the light curve and interpret it in terms of excited-mode frequencies. After describing the noise properties in detail, we use various time series analyses and fitting techniques to model the CoRoT light curve, for various physical assumptions. We apply statistical goodness-of-fit criteria that allow us to select the most appropriate physical model fit to the data. We conclude that the light-curve model based on nonlinear resonant frequency and phase locking provides the best representation of the data. Interpretation of the residuals is dependent on the chosen physical model used to prewhiten the data. Our observational results constitute a fruitful starting point for detailed seismic stellar modelling of this large-amplitude and evolved beta Cep star.2009A&A...506..111Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/506/111CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/corot : CoRoT observation log (CoRoT, 2009)J/A+A/361/245 : 6 new Beta Cep stars (Aerts, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/506/111https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/506/111http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/506/111https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/506/111https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/506/111http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/506/111GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/506/111/table1Results of frequency analysis of the first 200 frequenciese_PError on phasestat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqFrequency ID numbermeta.id;meta.mainintf1Frequency valued**-1stat.fit.paramdoublee_f1Error on frequency valued**-1stat.errordoublef2Frequency value (identical to f1)uHzstat.fit.paramdoublee_f2Error on frequency value (identical to e_f1)uHzstat.errordoubleARatio amplitude/average fluxphot.mag;arith.ratiodoublee_AError on amplitudestat.errordoubleP]-0.5,0.5] Phase (rad/2{pi})stat.fit.paramfloatSNRSignal-to-noise ratio over 6d-1 intervalstat.snr;time.intervalfloatVRVariance reduction%stat.variancefloatAICValue of Akaike's Information Criterionstat.fit.paramfloatBICValue of Bayesian Information Criterionstat.fit.paramfloatJ/A+A/506/111/table2Frequency table with fixed combinations between parent and daughter modesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintARatio amplitude/average fluxphot.mag;arith.ratiodoublef1Frequency valued**-1stat.fit.paramdoublef2Frequency value (same as f1)uHzstat.fit.paramdoubleP]-0.5,0.5] Phase (rad/2{pi})stat.fit.paramfloatAr? Relative amplitude (logarithmic)phot.mag;arith.ratiofloatnullablee_Ar? Error on amplitude ratiostat.errorfloatnullablePr]-0.5,0.5]? Relative phase (rad/2{pi})time.phasefloatnullablee_Pr]-0.5,0.5]? Error on relative phasestat.errorfloatnullableSNRSignal-to-noise ratio over 6d-1 intervalstat.snr;time.intervalfloatVRVariance reduction%stat.variancefloatAICValue of Akaike's Information Criterionstat.fit.paramfloatBICValue of Bayesian Information Criterionstat.fit.paramfloatJ/A+A/506/111/tablesVariable amplitude/phase model for a1, a2, a3, a4, phi1, phi2, phi3 and phi4 (tables 3-10 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintParam[a1, a2, a3, a4, phi1, phi2, phi3, phi4]meta.notecharARatio amplitude/average fluxphot.flux;arith.ratiodoublee_AError on amplitudestat.errordoublef1Frequency valued**-1stat.fit.paramfloate_f1Error on frequency valued**-1stat.errorfloatf2Frequency value (same as f1)uHzstat.fit.paramfloatP]-0.5,0.5] Phase (rad/2{pi})stat.fit.paramfloate_PError on phasestat.errorfloat