J/AJ/157/87ivo://CDS.VizieR/J/AJ/157/87doi:10.26093/cds/vizier.51570087CDSZasche P.Wolf M.2019-07-24T13:15:28Z2019-06-06T14:53:49ZCDS support team

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

cds-question@unistra.frmagellanic-cloudseclipsing-binary-starsearly-type-starsinfrared-photometryvisible-astronomybroad-band-photometrystellar-spectral-typesstellar-radiiWe present the apsidal motion and light-curve analyses of 21 eccentric eclipsing binaries located in the Small Magellanic Cloud. Most of these systems have never been studied before, hence their orbital and physical properties as well as the apsidal motion parameters are given here for the first time. All the systems are of early spectral type, having orbital periods up to 4 days. The apsidal motion periods were derived to be from 7.2 to 200 yr (OGLE-SMC-ECL-2194 having the shortest apsidal period among known main-sequence systems). The orbital eccentricities are usually rather mild (median of about 0.06), the maximum eccentricity being 0.33. For the period analysis using O-C diagrams of eclipse timings, in total 951 minima were derived from survey photometry as well as our new data. Moreover, six systems show some additional variation in their O-C diagrams, which should indicate the presence of hidden additional components in them. According to our analysis these third-body variations have periods from 6.9 to 22 yr.2019AJ....157...87Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/157/87CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/236 : UBVR CCD survey of the Magellanic clouds (Massey+, 2002)J/AcA/48/563 : BVI photometry of OGLE SMC eclipsing binariesJ/AJ/123/855 : Magellanic Clouds Photometric Survey: the SMCJ/MNRAS/331/609 : Catalogue of eclipsing binaries in the SMC (Bayne+, 2002)J/AcA/54/1 : OGLE II SMC eclipsing binaries (Wyrzykowski+, 2004)J/MNRAS/353/601 : 2dF survey of the Small Magellanic Cloud (Evans+, 2004)J/AJ/134/1963 : MACHO r,b light curves of MC eclipsing binariesJ/AcA/63/323 : OGLE-III SMC eclipsing binary stars (Pawlak+, 2013)J/A+A/572/A71 : Times of minima for 18 SMC eclipsing binaries (Zasche, 2014)J/ApJ/780/59 : The Araucaria project: eclipsing binaries in SMCJ/AJ/150/1 : Eclipse timings of 27 eclipsing binaries in the SMCJ/AcA/66/421 : Eclipsing binaries in the Magellanic System (Pawlak+, 2016)J/MNRAS/460/650 : Apsidal motions of 90 SMC eccentric binaries (Hong+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/157/87https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/157/87http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/157/87https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/157/87https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/157/87http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/157/87GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/157/87/stars (Relevant information for the analyzed systems (table 2) , parameters of the light-curve fits and the apsidal motion (table 3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/157/87/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/157/87/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/157/87/stars?GETtext/xml+votable180.050000true9.8912917-73.31550.0055555555555555566/33294 33295 33306 33316 33317https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/157/87?format=asciiOpticalInfrareddefaultJ/AJ/157/87/starsRelevant information for the analyzed systems (table 2) , parameters of the light-curve fits and the apsidal motion (table 3)SimbadNameSimbad column added by the CDSmeta.idcharSpTypeSpectral typesrc.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOGLE-IIIOGLE III system name (OGLE SMC-ECL-NNNNN in Simbad)meta.id;meta.maincharMinNumber of minima observed for this starmeta.numberintnullableOGLE-IIOGLE II system name (OGLE SMC-SCNN NNNNNN in Simbad)meta.idcharMACHOMACHO system name (MACHO FFF.NNNNN.NNNN in Simbad)meta.idcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainVmax[14.108/18.526] Out-of-eclipse V magnitude based on the OGLE database (see Pawlak et al. 2013, J/AcA/63/323)magphot.mag;em.opt.VfloatB-V[-0.284/0.445] Photometric index by Zaritsky et al. (2002, J/AJ/123/855) or Massey (2002, Cat. II/236)magphot.color;em.opt.B;em.opt.Vfloat(B-V)0[-0.611/-0.069] Dereddened value of B-Vmagphot.color;em.opt.B;em.opt.Vfloatr_SpType[cd] Reference for SpType (1)meta.ref;pos.framechari[71.06/92.02] Inclinationdegsrc.orbital.inclinationfloate_i[0.22/1.89] Uncertainty in idegstat.errorfloatT1[10500/29000] Fixed value of primary temperatureKphys.temperatureintT2[10590/31350] Computed temperatureKphys.temperatureinte_T2[231/1216] Uncertainty in T2Kstat.errorintL1[6/77.1] Luminosity ratio of first component in the I filter%phys.luminosity;arith.ratiofloate_L1[0.7/7] Uncertainty in L1%stat.errorfloatL2[12.6/57.8] Luminosity ratio of second component in the I filter%phys.luminosity;arith.ratiofloate_L2[0.3/4.1] Uncertainty in L2%stat.errorfloatL3[0/73.1] Luminosity ratio of third component in the I filter%phys.luminosity;arith.ratiofloate_L3[0.7/7.5]? Uncertainty in L3%stat.errorfloatnullableR1/a[0.116/0.285] Relative radius of primaryphys.size.radius;arith.ratiofloate_R1/a[0.002/0.009] Uncertainty in R1/astat.errorfloatR2/a[0.129/0.296] Relative radius of secondaryphys.size.radiusfloate_R2/a[0.002/0.009] Uncertainty in R2/astat.errorfloatHJD0[50716/55610.3] Heliocentric Julian Date (HJD-2400000)dtime.epochdoublee_HJD0[0.0006/0.0209] Uncertainty in HJD0dstat.errorfloatPer[1.25112/3.80228] Perioddtime.perioddoublee_Per[4e-07/1.12e-05] Uncertainty in Perdstat.errordoublee[0.009/0.333] Eccentricity of the orbitsrc.orbital.eccentricityfloate_e[0.002/0.088] Uncertainty in estat.errorfloatomega[2.7/335.5] Argument of periastron {omega}_0_ at a reference time of HJD_0_degsrc.orbital.periastronfloate_omega[0.8/18.5] Uncertainty in omegadegstat.errorfloatU[7.2/190.2] Apsidal motion periodyrphys.veloc;time.periodfloate_U[0.3/43.7] Uncertainty in Uyrstat.error;pos.cartesian.xfloatJ/AJ/157/87/table1Heliocentric times of minima used for analysisrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOGLE-IIIOGLE III system name (OGLE SMC-ECL-NNNNN in Simbad)meta.id;meta.maincharHJDHeliocentric Julian Date of minimumdtime.epochdoublee_HJD[0/0.10655] Uncertainty in HJDdstat.error;time.epochdoubleFilt[B R I] Filter usedinstr.setup;instr.filtercharRefSource/Observatorymeta.bibchar