J/A+A/559/A97ivo://CDS.VizieR/J/A+A/559/A97doi:10.26093/cds/vizier.35590097CDSLindborg M.Mantere M.J.Olspert N.Pelt J.Hackman T.Henry G.W.,Jetsu L.Strassmeier K.G.2017-06-26T11:50:47Z2014-02-18T13:33:40ZCDS support team

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

cds-question@unistra.frvariable-starsphotometryAccording to earlier Doppler images of the magnetically active primary giant component of the RS CVn binary II Peg, the surface of the star was dominated by one single active longitude that was clearly drifting in the rotational frame of the binary system during 1994-2002; later imaging for 2004-2010, however, showed decreased and chaotic spot activity, with no signs of the drift pattern. Here we set out to investigate from a more extensive photometric dataset whether such a drift is a persistent phenomenon, in which case it could be due to either an azimuthal dynamo wave or an indication of the binary system orbital synchronization still being incomplete. We analyse the datasets using the Carrier Fit method (hereafter CF), especially suitable for analyzing time series in which a fast clocking frequency (such as the rotation of the star) is modulated with a slower process (such as the stellar activity cycle).2013A&A...559A..97Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/559/A97CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/553/A40 : UBVI light curves of FK Com (Hackman+, 2013)J/A+A/480/495 : Patterns of color variations in close binaries (Messina, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/559/A97https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/559/A97http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/559/A97https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/559/A97https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/559/A97http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/559/A97GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/559/A97/table3Global Carrier Fit model for II Peg photometry during 1979-2010recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[2444168/2455384] Heliocentric Julian datedtime.epochdoubleVmag[7.22/8.00] V magnitudemagphot.mag;em.opt.Vdouble