J/PASP/108/332ivo://CDS.VizieR/J/PASP/108/332doi:10.26093/cds/vizier.61080332CDSLapasset E.Gomez M.Farinas R.2025-09-09T14:12:07Z1997-12-09T21:47:15ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsphotometryWe present BV light-curve synthetic analyses of three short-period contact (W UMa) binaries: HY Pavonis (P=~0.35days), AW Virginis (P=~0.35days), and BP Velorum (P=~0.26days). Different possible configurations for wide range of the mass ratio were explored in each case making use of the Wilson-Devinney code. The photometric parameters of the systems were determined from the synthetic light-curve solutions that best fit the observations. AW Vir has two components of very similar temperatures and therefore the subtype (A or W) remains undetermined. HY Pav and BP Vel are best modeled by W-type configurations and the asymmetries in the light curves are reproduced by introducing cool spots on the more massive secondary components. Although BP Vel lies in the region of the open cluster Cr 173, its distance modulus, in principle, rules it out as a cluster member.1996PASP..108..332Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PASP/108/332CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PASP/108/332https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PASP/108/332http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PASP/108/332https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PASP/108/332https://vizier.iucaa.in/viz-bin/votable?-source=J/PASP/108/332http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PASP/108/332GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/PASP/108/332/table1aIndividual observations of HY PavonisrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD-2440000HJD of observation (-2440000)dtime.epochdoublePhase[0/1[ Phasetime.phasefloatdVDifferential (Var-Comp) V magnitudemagphot.mag;arith.difffloatdBDifferential (Var-Comp) B magnitudemagphot.mag;arith.difffloatJ/PASP/108/332/table1bIndividual observations of AW VirginisdBDifferential (Var-Comp) B magnitudemagphot.mag;arith.difffloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD-2440000HJD of observation (-2440000)dtime.epochdoublePhase[0/1[ Phasetime.phasefloatdVDifferential (Var-Comp) V magnitudemagphot.mag;arith.difffloatJ/PASP/108/332/table1cIndividual observations of BP VelorumrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD-2440000HJD of observation (-2440000)dtime.epochdoublePhase[0/1[ Phasetime.phasefloatdVDifferential (Var-Comp) V magnitudemagphot.mag;arith.difffloatdBDifferential (Var-Comp) B magnitudemagphot.mag;arith.difffloatJ/PASP/108/332/table3aHY Pavonis normal pointsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPhase[0/1[ Phasetime.phasefloatIVIntensity in Vphot.flux;em.opt;arith.ratiofloatIBIntensity in Bphot.flux.density;arith.ratiofloatJ/PASP/108/332/table3bAW Virginis normal pointsIVIntensity in Vphot.flux;em.opt;arith.ratiofloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPhase[0/1[ Phasetime.phasefloatIBIntensity in Bphot.flux.density;arith.ratiofloatJ/PASP/108/332/table3cBP Velorum normal pointsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPhase[0/1[ Phasetime.phasefloatIVIntensity in Vphot.flux;em.opt;arith.ratiofloatIBIntensity in Bphot.flux.density;arith.ratiofloat