J/A+A/640/A33ivo://CDS.VizieR/J/A+A/640/A33doi:10.26093/cds/vizier.36400033CDSZasche P.Wolf M.Kucakova H.Kara J.Merc J.Zejda M.Skarka M.,Janik J.Kurfurst P.2021-12-17T07:53:18Z2020-08-07T08:06:05ZCDS support team

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

cds-question@unistra.frmagellanic-cloudseclipsing-binary-starsphotometryWe present an extensive study of 162 early-type binary systems located in the LMC galaxy that show apsidal motion and have never been studied before. For the ample systems, we performed light curve and apsidal motion modelling for the first time. These systems have a median orbital period of 2.2 days and typical periods of the apsidal motion were derived to be of the order of decades. We identified two record-breaking systems. The first, OGLE LMC-ECL-22613, shows the shortest known apsidal motion period among systems with main sequence components (6.6 years); it contains a third component with an orbital period of 23 years. The second, OGLE LMC-ECL-17226, is an eccentric system with the shortest known orbital period (0.9879 days) and with quite fast apsidal motion period (11 years). Among the studied systems, 36 new triple-star candidates were identified based on the additional period variations. This represents more than 20% of all studied systems, which is in agreement with the statistics of multiples in our Galaxy. However, the fraction should only be considered as a lower limit of these early-type stars in the LMC because of our method of detection, data coverage, and limited precision of individual times of eclipses.2020A&A...640A..33Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/640/A33CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AcA/66/421 : Eclipsing binaries in the Magellanic System (Pawlak+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/640/A33https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/640/A33http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/640/A33https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/640/A33https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/640/A33http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/640/A33GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/640/A33/stars (List of studied stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/640/A33/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/640/A33/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/640/A33/stars?GETtext/xml+votable180.050000true69.2843333-69.11530560.0055555555555555566/33053 33075 33078-33079 33081 33085 33090-33092 33094 33096-33098 33100-33102 33106 33120-33121 33124 33128 37512https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/640/A33?format=asciidefaultJ/A+A/640/A33/starsList of studied starsLCShow the light curvesmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarName of the star, OGLE LMC-ECL-NNNNNmeta.id;meta.maincharRAJ2000Simbad Right Ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Simbad Declination (J2000.0)pos.eq.dec;meta.mainPerPeriod (from table A2)dtime.perioddoublee_Perrms uncertainty on Per (from table A2)dstat.errordoubleNR? Number of measurements in R bandmeta.numberintnullableNI? Number of measurements in I bandmeta.numberintnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/640/A33/tablePhotometric data from Danish 1.54-m telescope for 162 eccentric eclipsing binaries from LMCrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarName of the star, OGLE LMC-ECL-NNNNNmeta.id;meta.maincharHJDHeliocentric Julian Date (HJD-2400000)dtime.epochdoubleindexedmagDifferential magnitudemagphot.mag;arith.difffloatFilter[RI] Photometric filter usedinstr.setup;instr.filterchar