J/MNRAS/498/2833ivo://CDS.VizieR/J/MNRAS/498/2833doi:10.26093/cds/vizier/bg-fj-2rhCDSCarmo A.Ferreira Lopes C.E.Papageorgiou A.Jablonski F.J.,Rodrigues C.V.Drake A.J.Cross N.J.G.Catelan M.2026-08-03T07:30:10Z2023-11-03T12:25:25ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsmultiple-starsorbitsvariable-starseffective-temperaturestellar-massesstellar-radiistellar-distancevisible-astronomyThe discovery and characterization of Algol eclipsing binaries (EAs) provide an opportunity to contribute for a better picture of the structure and evolution of low-mass stars. However, the cadence of most current photometric surveys hinders the detection of EAs since the separation between observations is usually larger than the eclipse(s) duration and hence few measurements are found at the eclipses. Even when those objects are detected as variable, their periods can be missed if an appropriate oversampling factor is not used in the search tools. In this paper, we apply this approach to find the periods of stars catalogued in the Catalina Real-Time Transient Survey (CRTS) as EAs having unknown period (EA_up_). As a result, the periods of ~56 per cent of them were determined. Eight objects were identified as low-mass binary systems and modelled with the Wilson & Devinney synthesis code combined with a Markov chain Monte Carlo optimization procedure. The computed masses and radii are in agreement with theoretical models and show no evidence of inflated radii. This paper is the first of a series aiming to identify suspected binary systems in large surveys.2020MNRAS.498.2833Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/498/2833CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/213/9 : Catalina Surveys periodic variable stars (Drake+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/498/2833https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/498/2833http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/498/2833https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/498/2833https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/498/2833http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/498/2833GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/498/2833/tablea1 (Parameters for the iEA stars identified in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/498/2833/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/498/2833/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/498/2833/tablea1?GETtext/xml+votable180.050000true64.5433892-2.77433560.0055555555555555566/452 693 823 998 1105 1148 1199 1204 1246 1562 1579 1632 1673 2669 2694 2708 4154 4643 4908 5113 5836 6149 6258 6370 6545 6643 7123-7124 7161 7272 8236 9588 10166 10408 12310 13320 13569 13584 13670 15085 16876 17751 18577 19276 20105 20320 20378 21085 21117 21325 21412 21446 21467 21820 21986 22608 22767 22913 22925 23127 23326 23696 24083 24098 25266 27006 27039 27213 27445 27448 30943 31135 31639 31711 31724 32649 36662 40316 40801 40871 40877 40930 40947 44634 490993.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/498/2833?format=asciiOpticaldefaultJ/MNRAS/498/2833/table2Absolute parameters of the stellar components of the low-mass binary system candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCRTS system name (CSS JHHMMSS.s-DDMMSS)meta.id;meta.maincharPeriodOrbital perioddtime.perioddoubleTeffEffective temperature of the systemKphys.temperature.effectiveintT1Effective temperature of the primary starKphys.temperature.effectiveintT2Effective temperature of the secondary starKphys.temperature.effectiveintM1Mass of the primary starsolMassphys.massfloatE_M1Upper error on M1 (1)solMassstat.error;stat.maxfloate_M1Lower error on M1 (1)solMassstat.errorfloatM2Mass of the secondary starsolMassphys.massfloatE_M2Upper error on M2 (1)solMassstat.error;stat.maxfloate_M2Lower error on M2 (1)solMassstat.errorfloatR1Radius of the primary starsolRadphys.size.radiusfloatE_R1Upper error on R1 (1)solRadstat.error;stat.maxfloate_R1Lower error on R1 (1)solRadstat.errorfloatR2Radius of the secondary starsolRadphys.size.radiusfloatE_R2Upper error on R2 (1)solRadstat.error;stat.maxfloate_R2Lower error on R2 (1)solRadstat.errorfloataSemi-major axissolRadphys.angSize.smajAxisfloatE_aUpper error on a (1)solRadstat.error;stat.maxfloate_aLower error on a (1)solRadstat.errorfloatIDCSS system identifiermeta.idJ/MNRAS/498/2833/tablea1Parameters for the iEA stars identified in this workSimbadNameSimbad column added by the CDSmeta.idcharnullableMoreLink to Tables 2, B1 and B2meta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCRTS system name (CSS JHHMMSS.s-DDMMSS)meta.id;meta.maincharprimaryPeriodOrbital perioddtime.perioddoublee_PeriodError on Perioddstat.error;time.perioddoubleVmagCSS V-band magnitudemagphot.mag;em.opt.VfloatAAmplitudemagphot.magfloate_AError on Amagstat.errorfloatlogNcycLogarithm of the number of cycles (log (T_tot_/P))meta.numberfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/MNRAS/498/2833/tableb1Parameters obtained from the model fits to the light curvesiInclinationdegsrc.orbital.inclinationfloate_iError on idegstat.errorfloatOmega1Modified Kopal potential {Omega}_1_src.orbitalfloate_Omega1Error on Omega1stat.errorfloatOmega2Modified Kopal potential {Omega}_2_src.orbitalfloate_Omega2Error on Omega2stat.errorfloatNameCRTS system name (CSS JHHMMSS.s-DDMMSS)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDCSS system identifiermeta.idT1Effective temperature of the primary star (fixed)Kphys.temperature.effectiveintT2/T1Effective temperature ratio (secondary to primary)phys.temperaturefloate_T2/T1Error on T2/T1stat.errorfloat(R1+R2)/aSum of fractional radiiphys.size;arith.ratiofloate_(R1+R2)/aError on R1+R2)/astat.errorfloatJ/MNRAS/498/2833/tableb2Parameters obtained from the redone model fits in order to improve parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCRTS system name (CSS JHHMMSS.s-DDMMSS)meta.id;meta.maincharIDCSS system identifiermeta.idT2/T1Effective temperature ratio (secondary to primary) (fixed)phys.temperaturefloat(R1+R2)/aSum of fractional radiiphys.size;arith.ratiofloate_(R1+R2)/aError on R1+R2)/astat.errorfloatiInclinationdegsrc.orbital.inclinationfloate_iError on idegstat.errorfloatOmega1Modified Kopal potential {Omega}_1_src.orbitalfloate_Omega1Error on Omega1stat.errorfloatOmega2Modified Kopal potential {Omega}_2_src.orbitalfloate_Omega2Error on Omega2stat.errorfloatDistDistance estimated from the fitted parameterspcpos.distanceinte_DistError on Distpcstat.errorint