J/MNRAS/510/3102ivo://CDS.VizieR/J/MNRAS/510/3102doi:10.26093/cds/vizier.75103102CDSJones D.Munday J.Corradi R.L.M.Rodriguez-Gil P.Boffin H.M.J.,Zak J.Sowicka P.Parsons S.G.Dhillon V.S.Littlefair S.P.,Marsh T.R.Reindl N.Garcia-Rojas J.2024-08-21T20:19:06Z2022-01-19T09:32:07ZCDS support team

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

cds-question@unistra.frplanetary-nebulaeeclipsing-binary-starsspectroscopic-binary-starsinfrared-photometryvisible-astronomybroad-band-photometryradial-velocityWe present a detailed study of the stellar and orbital parameters of the post-common envelope binary central star of the planetary nebula Ou5. Low-resolution spectra obtained during the primary eclipse - to our knowledge the first isolated spectra of the companion to a post-common-envelope planetary nebula central star - were compared to catalogue spectra, indicating that the companion star is a late K- or early M-type dwarf. Simultaneous modelling of multi-band photometry and time-resolved radial velocity measurements was then used to independently determine the parameters of both stars as well as the orbital period and inclination. The modelling indicates that the companion star is low mass (~0.25M_{sun}_) and has a radius significantly larger than would be expected for its mass. Furthermore, the effective temperature and surface gravity of nebular progenitor, as derived by the modelling, do not lie on single-star post-AGB evolutionary tracks, instead being more consistent with a post-RGB evolution. However, an accurate determination of the component masses is challenging. This is principally due to the uncertainty on the locus of the spectral lines generated by the irradiation of the companion's atmosphere by the hot primary (used to derive companion star's radial velocities), as well as the lack of radial velocities of the primary.2022MNRAS.510.3102Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/510/3102CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/510/3102https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/510/3102http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/510/3102https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/510/3102https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/510/3102http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/510/3102GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/MNRAS/510/3102/rvRadial velocity measurements of the cool component of the central star of PN Ou5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RVUncertainty on radial velocity measurementkm/sstat.errorfloatJ/MNRAS/510/3102/g-hipWHT-HiPERCAM g-band photometry of the central star of the central star of PN Ou5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublemagApparent magnitude in g-bandmagphot.magfloate_magUncertainty on apparent magnitudemagstat.error;phot.magfloatJ/MNRAS/510/3102/g-wfcINT-WFC g-band photometry of the central star of the central star of PN Ou5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublemagApparent magnitude in g-bandmagphot.magfloate_magUncertainty on apparent magnitudemagstat.error;phot.magfloatJ/MNRAS/510/3102/i-hipWHT-HiPERCAM i-band photometry of the central star of the central star of PN Ou5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublemagApparent magnitude in g-bandmagphot.magfloate_magUncertainty on apparent magnitudemagstat.error;phot.magfloatJ/MNRAS/510/3102/i-iac80IAC80 i-band photometry of the central star of the central star of PN Ou5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublemagApparent magnitude in g-bandmagphot.magfloate_magUncertainty on apparent magnitudemagstat.error;phot.magfloatJ/MNRAS/510/3102/i-wfcINT-WFC i-band photometry of the central star of the central star of PN Ou5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublemagApparent magnitude in g-bandmagphot.magfloate_magUncertainty on apparent magnitudemagstat.error;phot.magfloatJ/MNRAS/510/3102/r-hipWHT-HiPERCAM r-band photometry of the central star of the central star of PN Ou5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublemagApparent magnitude in g-bandmagphot.magfloate_magUncertainty on apparent magnitudemagstat.error;phot.magfloatJ/MNRAS/510/3102/r-wfcINT-WFC r-band photometry of the central star of the central star of PN Ou5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublemagApparent magnitude in g-bandmagphot.magfloate_magUncertainty on apparent magnitudemagstat.error;phot.magfloat