J/A+A/553/A28ivo://CDS.VizieR/J/A+A/553/A28doi:10.26093/cds/vizier.35530028CDSGonzalez-Buitrago D.Tovmassian G.Zharikov S.Yungelson L.Miyaji T.,Echevarria J.Aviles A.Valyavin G.2020-08-31T15:45:33Z2013-04-25T08:37:10ZCDS support team

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

cds-question@unistra.frcataclysmic-variable-starsnovaephotometryWe conducted a multi-wavelength study to unveil the properties of the extremely long-period cataclysmic variable V479 And. We performed series of observations, including moderate to high spectral resolution optical spectrophotometry, X-ray observations with Swift, linear polarimetry and near-IR photometry. This binary system is a low-inclination ~17{deg} system with a 0.594093(4) day orbital period. The absorption line complex in the spectra indicate a G8-K0 spectral type for the donor star, which has departed from the zero-age main sequence. This implies a distance to the object of about 4kpc. The primary is probably a massive 1.1-1.4M_{sun}_ magnetic white dwarf, accreting matter at a rate dM/dt>10^-10^M_{sun}_/yr. This rate can be achieved if the donor star fills its corresponding Roche lobe, but there is little observational evidence for a mass-transfer stream in this system. An alternative explanation is a stellar wind from the donor star, although such a high rate mass loss is not anticipated from a subgiant. If the strongly magnetic white dwarf in V479 And is confirmed by future observations, the system the polar with the longest observed orbital period. We also discuss the evolutionary state of V479 And.2013A&A...553A..28Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/553/A28CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/553/A28https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/553/A28http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/553/A28https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/553/A28https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/553/A28http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/553/A28GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapAssociated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/553/A28defaultJ/A+A/553/A28/photvV band photometry of V479 AndrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian date (HJD-2455000)dtime.epochdoublemagI or V magnitudemagphot.magdoubleJ/A+A/553/A28/photiI band photometry of V479 AndrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian date (HJD-2455000)dtime.epochdoublemagI or V magnitudemagphot.magdoubleJ/A+A/553/A28/listList of FITS spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintspFileName of the spectrum FITS file in subdirectory spmeta.id;meta.fitscharObs.DateObservation date (YYYY/MM/DD or YYYY-YYYY)time.epoch;obscharTitleTitle of the filemeta.notecharAssocDataAssociated Data web pagemeta.ref.urlcharspPlot of the spectrummeta.ref.urlchar