J/A+A/652/A49ivo://CDS.VizieR/J/A+A/652/A49doi:10.26093/cds/vizier.36520049CDSKara J.Zharikov S.Wolf M.Kucakova H.Cagas P.,Medina Rodriguez A.L.Masek M.2021-09-29T13:18:53Z2021-08-10T10:39:03ZCDS support team

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

cds-question@unistra.freclipsing-binary-starscataclysmic-variable-starsphotometryspectroscopyWe present a new study of the eclipsing cataclysmic variable CzeV404 Her (Porb=0.098d) located in the period gap. This report aims to determine the object's origin, system parameters and probe the system's accretion flow structure. We conducted simultaneous time-resolved photometric and spectroscopic observations of CzeV404 Her. We applied our light curve modeling techniques and the Doppler tomography method to determine the system parameters and analyse the structure of the accretion disk. We found that the system has a massive white dwarf M_WD_=1.00(2)M_{sun}_, a mass ratio of q=0.16, and a relatively hot secondary with an effective temperature T_2_=4100(50)K. The system inclination is 78{deg}. The accretion disk spreads out to the tidal limitation radius and has an extended hot spot/line region. The hot spot/line is hotter than the rest of the disk's outer part in quiescence or intermediate state but does not stand out completely from the disk flux in (super)outbursts. We claim that this object represents a link between two distinct classes of SU UMa-type and SW Sex-type cataclysmic variables. The accretion flow structure in the disk corresponds to the SW Sex systems, but the physical conditions inside the disk passed into behaviors of SU UMa-type objects.2021A&A...652A..49Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/652/A49CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/652/A49https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/652/A49http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/652/A49https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/652/A49https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/652/A49http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/652/A49GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/652/A49/table4EclipsesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[55835.35/59355.5] Heliocentric Julian date (HJD-2400000)time.epochdoubleBJD[55835.35/59355.5] Barycentric Julian date (BJD-2400000)time.epochdoublermsUncertainty of the time determinationstat.error;time.epochdoubleEpoch[-596026] Epoch of the eclipseyrtime.epochintObservatoryPlace of observations (BSO, LS, OND or SPM)meta.id;instr.obstycharJ/A+A/652/A49/lcLight curveFilterPhotometric filter (1)instr.bandpasscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[55835.26/59355.55] Heliocentric Julian date (HJD-2400000)time.epochdoubleindexedmag[14.14/17.89] Magnitude in Filtermagphot.magfloatJ/A+A/652/A49/listspList of spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintspShow the spectrummeta.ref.urlcharFileNameName of the spectrum file in subdirectory spmeta.id;meta.filecharTitleTitle of the filemeta.title;meta.filechar