J/MNRAS/485/2562ivo://CDS.VizieR/J/MNRAS/485/2562doi:10.26093/cds/vizier.74852562CDSHajdu T.Borkovits T.Forgacs-Dajka E.Sztakovics J.Marschalko G.,Kutrovatz G.2024-08-19T20:17:25Z2022-11-17T15:36:48ZCDS support team

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

cds-question@unistra.frmultiple-starseclipsing-binary-starsorbitsvisible-astronomyWe report a study of the eclipse timing variation (ETV) of short period (P1=<6d) eclipsing binaries (EBs) monitored during the photometric survey optical gravitational lensing experiment-IV. From the 425193 EBs, we selected approximately 80000 binaries that we found suitable for further examination. Among them, we identified 992 potential hierarchical triple (or multiple) system candidates exhibiting light-travel time effect (LTTE). Besides, we obtained the orbital parameters of these systems and carried out statistical analyses on the properties of these candidates. We found that (i) there is a significant lack of triple systems where the outer period is less than 500d, (ii) the distribution of the outer eccentricities has a maximum around e_2_~0.3, and (iii) the outer mass ratio calculated from an estimated minimum mass of the third component is lower than q_2_~0.5 for the majority of the sample. We also present some systems that deserve special attention: (i) There are four candidates that show double periodic ETV, which we explain by the presence of a fourth companion; (ii) For two systems, the perturbations of the third component are also found to be significant therefore we give a combined dynamical and LTTE ETV solution; and (iii) For one system, the third component is found to be probably in the substellar mass domain.2019MNRAS.485.2562Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/485/2562CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AcA/66/405 : Galactic bulge eclipsing & ellipsoidal binarieshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/485/2562https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/485/2562http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/485/2562https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/485/2562https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/485/2562http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/485/2562GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/485/2562/table1 (LTTE solutions for the 258 most certain hierarchical triple star candidates of the OGLE-IV sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/485/2562/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/485/2562/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/485/2562/table1?GETtext/xml+votable180.050000true263.2016039-27.33326080.005555555555555556Cone search capability for table J/MNRAS/485/2562/table2 (LTTE solutions for the remaining, less certain hierarchical triple star candidates of the OGLE-IV sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/485/2562/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/485/2562/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/485/2562/table2?GETtext/xml+votable180.050000true267.9945417-29.34116670.005555555555555556Cone search capability for table J/MNRAS/485/2562/table3 (Orbital elements from combined dynamical and LTTE solutions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/485/2562/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/485/2562/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/485/2562/table3?GETtext/xml+votable180.050000true267.9759628-29.565030.005555555555555556Cone search capability for table J/MNRAS/485/2562/table4 (Results of double LTTE solution fit)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/485/2562/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/485/2562/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/485/2562/table4?GETtext/xml+votable180.050000true267.810165-29.14735640.005555555555555556Cone search capability for table J/MNRAS/485/2562/table5 (The seven systems where the third component has higher mass than the EB)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/485/2562/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/485/2562/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/485/2562/table5?GETtext/xml+votable180.050000true267.7339486-29.80233940.0055555555555555565/7205 7216 6/28734-28735 28779 28817 28819 28828-28829 28831 28851 28857 28859-28860 28868 28870-28873https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/485/2562?format=asciiOpticaldefaultJ/MNRAS/485/2562/table1LTTE solutions for the 258 most certain hierarchical triple star candidates of the OGLE-IV sampleSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDOGLE-BLG-ECL identifier (NNNNNN)meta.id;meta.mainintT0Epoch (HJD-2450000d)dtime.epochdoubleP1Inner perioddtime.perioddoubleP2Outer perioddtime.perioddoublee_P2Error on P2dstat.errordoubleasini2Projected semi-major axis of the light-time orbitsolRadphys.angSize.smajAxisfloate_asini2Error on asini2solRadstat.errorfloate2Eccentricitysrc.orbital.eccentricityfloate_e2Error on e2stat.errorfloatomega2Argument of the periastrondegsrc.orbital.periastronfloate_omega2Error on omega2degstat.errorfloattau2Periastron passage time of the third companiondsrc.orbital.periastronfloate_tau2Error on tau2dstat.errorfloatfmCMass functionphys.massdoublee_fmCError on fmCstat.errordoubleDeltaP1? Parabolic term (1)stat.fit.paramfloatnullablee_DeltaP1? Error on DeltaP1 (1)stat.errorfloatnullable_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/485/2562/table2LTTE solutions for the remaining, less certain hierarchical triple star candidates of the OGLE-IV sampleSimbadNameSimbad column added by the CDSmeta.idcharnullablee2Eccentricitysrc.orbital.eccentricityfloate_e2Error on e2stat.errorfloate_fmCError on fmCstat.errordoubleDeltaP1? Parabolic term (1)stat.fit.paramfloatnullablee_DeltaP1? Error on DeltaP1 (1)stat.errorfloatnullable_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.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDOGLE-BLG-ECL identifier (NNNNNN)meta.id;meta.mainintT0Epoch (HJD-2450000d)dtime.epochdoubleP1Inner perioddtime.perioddoubleP2Outer perioddtime.perioddoublee_P2Error on P2dstat.errordoubleasini2Projected semi-major axis of the light-time orbitsolRadphys.angSize.smajAxisfloate_asini2Error on asini2solRadstat.errorfloatomega2Argument of the periastrondegsrc.orbital.periastronfloate_omega2Error on omega2degstat.errorfloattau2Periastron passage time of the third companiondsrc.orbital.periastronfloate_tau2Error on tau2dstat.errorfloatfmCMass functionphys.massdoubleJ/MNRAS/485/2562/table3Orbital elements from combined dynamical and LTTE solutionsSimbadNameSimbad column added by the CDSmeta.idcharnullablee_tau2Error on tau2dstat.errorfloate_omega2Error on omega2degstat.errorfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDOGLE-BLG-ECL identifier (NNNNNN)meta.id;meta.mainintT0Epoch (HJD-2450000d)dtime.epochdoubleP1Inner perioddtime.perioddoubleP2Outer perioddtime.periodfloate_P2Error on P2dstat.errorfloatasini2Projected semi-major axis of the light-time orbitsolRadphys.angSize.smajAxisfloate_asini2Error on asini2solRadstat.errorfloate2Eccentricitysrc.orbital.eccentricityfloate_e2Error on e2stat.errorfloatomega2Argument of the periastrondegsrc.orbital.periastronfloattau2Periastron passage time of the third companiondsrc.orbital.periastronfloatALTTELight-travel time effect (LTTE) amplitudedtime.epochfloate_ALTTEError on ALTTEdstat.errorfloatAdynAmplitude-like quantity of the dynamical eclipse timing variation (ETV) componentdtime.epochfloatAdyn/ALTTEAdyn to ALTTE ratiotime;arith.ratiofloatfmCMass functionphys.massfloate_fmCError on fmCstat.errorfloatmC/mABCmC to mABC mass ratiophys.mass;arith.ratiofloate_mC/mABCError on mC/mABCstat.errorfloatmABTotal mass of the inner binarysolMassphys.massfloate_mABError on mABsolMassstat.errorfloatmCMass of the third componentsolMassphys.massfloate_mCError on mCsolMassstat.errorfloat_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/MNRAS/485/2562/table4Results of double LTTE solution fitSimbadNameSimbad column added by the CDSmeta.idcharnullableomega3Argument of the periastron associated to the first LTTEdegmeta.id.assoc;src.orbital.periastronfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDOGLE-BLG-ECL identifier (NNNNNN)meta.id;meta.mainintT0Epoch (HJD-2450000d)dtime.epochdoubleP1Inner perioddtime.perioddoubleP2Outer period of the first light-travel time effect (LTTE)dtime.periodfloate_P2Error on P2dstat.errorfloatasini2Projected semi-major axis of the light-time or bit associated to the first LTTEsolRadphys.angSize.smajAxisfloate_asini2Error on asini2solRadstat.errorfloate2Eccentricity associated to the first LTTEsrc.orbital.eccentricityfloate_e2Error on e2stat.errorfloatomega2Argument of the periastron associated to the first LTTEdegmeta.id.assoc;src.orbital.periastronfloate_omega2Error on omega2degstat.errorfloattau2Periastron passage time of the third companion associated to the first LTTEdsrc.orbital.periastronfloate_tau2Error on tau2dstat.errorfloatfmCMass function associated to the first LTTEmeta.id.assoc;phys.massfloate_fmCError on fmCstat.errorfloatP3Outer period of the second light-travel time effect (LTTE)dtime.periodfloate_P3Error on P3dstat.errorfloatasini3Projected semi-major axis of the light-time or bit associated to the first LTTEsolRadphys.angSize.smajAxisfloate_asini3Error on asini3solRadstat.errorfloate3Eccentricity associated to the first LTTEsrc.orbital.eccentricityfloate_e3Error on e3stat.errorfloate_omega3Error on omega3degstat.errorfloattau3Periastron passage time of the third companion associated to the first LTTEdsrc.orbital.periastronfloate_tau3Error on tau3dstat.errorfloatfmDMass function associated to the first LTTEmeta.id.assoc;phys.massfloate_fmDError on fmDstat.errorfloat_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/485/2562/table5The seven systems where the third component has higher mass than the EBSimbadNameSimbad column added by the CDSmeta.idcharnullablee_fmCError on fmCstat.errorfloatmCMass of the third componentsolMassphys.massfloate_mCError on mCsolMassstat.errorfloat_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.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDOGLE-BLG-ECL identifier (NNNNNN)meta.id;meta.mainintP1Inner perioddtime.perioddoubleP2Outer perioddtime.periodfloate_P2Error on P2dstat.errorfloatfmCMass functionphys.massfloat