J/MNRAS/405/1770ivo://CDS.VizieR/J/MNRAS/405/1770doi:10.26093/cds/vizier.74051770CDSNicholls C.P.Wood P.R.Cioni M.-R.L.2024-07-11T20:16:45Z2011-01-13T13:49:21ZCDS support team

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

cds-question@unistra.frgiant-starsvariable-starsradial-velocityWe have studied a sample of Large Magellanic Cloud red giant binaries that lie on sequence E in the period-luminosity plane. We show that their combined light and velocity curves unambiguously demonstrate that they are binaries showing ellipsoidal variability. By comparing the phased light and velocity curves of both sequence D and E variables, we show that the sequence D variation - the long secondary period - is not caused by ellipsoidal variability. We also demonstrate several further differences between stars on sequences D and E. These include differences in velocity amplitude, in the distribution of eccentricity and in the correlations of velocity amplitude with luminosity and period. We also show that the sequence E stars, unlike stars on sequence D, do not show any evidence of a mid-infrared excess that would indicate circumstellar dust.2010MNRAS.405.1770Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/405/1770CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/399/2063 : 58 MACHO sequence D red giants (Nicholls+, 2009)http://macho.anu.edu.au/ : MACHO Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/405/1770https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/405/1770http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/405/1770https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/405/1770https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/405/1770http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/405/1770GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/405/1770/table23 (Sequence E stars orbital elements and properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/405/1770/table23?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/405/1770/table23?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/405/1770/table23?GETtext/xml+votable180.050000true81.5559583-69.7467250.0055555555555555566/33096-33097https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/405/1770?format=asciiOpticaldefaultJ/MNRAS/405/1770/table23Sequence E stars orbital elements and propertiese_erms uncertainty on estat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRVPlot: Show the Radial Velocity curvesmeta.ref.urlcharMACHOMACHO namemeta.id;meta.mainchargammaSystem velocitykm/sphys.veloc;pos.heliocentricfloate_gammarms uncertainty on gammakm/sstat.errorfloatKVelocity semi-amplitudekm/sphys.velocfloate_Krms uncertainty on Kkm/sstat.errorfloateEccentricitysrc.orbital.eccentricityfloatomegaAngle of periastron {omega}degsrc.orbital.periastronfloate_omegarms uncertainty on omegadegstat.errorfloatT0Date of periastron (HJD-2450000)dtime.epochfloate_T0rms uncertainty on T0dstat.errorfloatPerPerioddtime.periodfloatasiniSemimajor axis of the red giant's orbitsolRadphys.size.smajAxisfloate_asinirms uncertainty on asinisolRadstat.errorfloatf(m)Mass functionsolMassphys.massfloate_f(m)rms uncertainty on f(m)solMassstat.errorfloatM1Mass of the red giant, assuming sini=1solMassphys.massfloatM2Mass of the companionsolMassphys.massfloatRRadiussolRadphys.size.radiusfloatLumLuminositysolLumphys.luminosityfloatTeffEffective temperatureKphys.temperature.effectivefloataSemi-major axissolRadphys.size.smajAxisfloat_RAPositions from MACHO (right ascension part)degpos.eq.ra;meta.main_DEPositions from MACHO (declination part)degpos.eq.dec;meta.mainJ/MNRAS/405/1770/table1Radial velocities of sequence E starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleRV1? Radial velocity for MACHO 77.7429.189km/sspect.dopplerVelocdoublenullableRV2? Radial velocity for MACHO 77.7548.68km/sspect.dopplerVelocdoublenullableRV3? Radial velocity for MACHO 77.7672.98km/sspect.dopplerVelocdoublenullableRV4? Radial velocity for MACHO 77.7673.79km/sspect.dopplerVelocdoublenullableRV5? Radial velocity for MACHO 77.7789.152km/sspect.dopplerVelocdoublenullableRV6? Radial velocity for MACHO 77.7790.72km/sspect.dopplerVelocdoublenullableRV7Radial velocity for MACHO 77.7791.115km/sspect.dopplerVelocdoubleRV8? Radial velocity for MACHO 77.7910.41km/sspect.dopplerVelocdoublenullableRV9? Radial velocity for MACHO 77.7910.77km/sspect.dopplerVelocdoublenullableRV10? Radial velocity for MACHO 77.7912.111km/sspect.dopplerVelocdoublenullableRV11? Radial velocity for MACHO 77.7914.74km/sspect.dopplerVelocdoublenullable