J/ApJ/835/209ivo://CDS.VizieR/J/ApJ/835/209doi:10.26093/cds/vizier.18350209CDSNie J.D.Wood P.R.Nicholls C.P.2017-10-26T12:51:06Z2017-09-19T16:36:29ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsmultiple-starsgiant-starsradial-velocitystellar-radiiIn this paper, we collect a sample of 81 ellipsoidal red giant binaries in the Large Magellanic Cloud (LMC), and we study their orbital natures individually and statistically. The sample contains 59 systems with circular orbits and 22 systems with eccentric orbits. We derive orbital solutions using the 2010 version of the Wilson-Devinney code (Wilson & Devinney 1971ApJ...166..605W ; Wilson 1979ApJ...234.1054W, 1990ApJ...356..613W ; Wilson+ 2009, J/ApJ/702/403). The sample is selection-bias corrected, and the orbital parameter distributions are compared to model predictions for the LMC and to observations in the solar vicinity. The masses of the red giant primaries are found to range from about 0.6 to 9M_{sun}_ with a peak at around 1.5M_{sun}_, in agreement with studies of the star formation history of the LMC, which find a burst of star formation beginning around 4 Gyr ago. The observed distribution of mass ratios q=m_2_/m_1_ is more consistent with the flat q distribution derived for the solar vicinity by Raghavan+ (2010, J/ApJS/190/1) than it is with the solar vicinity q distribution derived by Duquennoy & Mayor (1991A&A...248..485D). There is no evidence for an excess number of systems with equal mass components. We find that about 20% of the ellipsoidal binaries have eccentric orbits, twice the fraction estimated by Soszynski+ (2004, J/AcA/54/347). Our eccentricity evolution test shows that the existence of eccentric ellipsoidal red giant binaries on the upper parts of the red giant branch (RGB) can only be explained if tidal circularization rates are ~1/100 the rates given by the usual theory of tidal dissipation in convective stars.2017ApJ...835..209Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/835/209CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/AJ/119/1448 : Improved properties for cool stars (Houdashelt+, 2000)J/AJ/119/1424 : Color-temperature relations of M giants (Houdashelt+, 2000)J/MNRAS/353/705 : OGLE Variables in Magellanic Clouds (Ita+, 2004)J/AcA/54/347 : IVB mag of LMC ellipsoidal variables (Soszinski+, 2004)J/A+A/484/815 : Scaled solar tracks and isochrones (Bertelli+, 2008)J/AJ/136/1242 : LMC long-period variables from MACHO (Fraser+, 2008)J/ApJ/702/403 : Photometric observations of V1197 Orionis (Wilson+, 2009)J/MNRAS/405/1770 : LMC red giants in E sequence (Nicholls+, 2010)J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)J/MNRAS/421/2616 : LMC eccentric ellipsoidal red giant binariesJ/ApJ/765/L41 : Asteroseismic classification of KIC objects (Stello+, 2013)J/AJ/148/118 : RV curves of LMC ellipsoidal variables (Nie+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/835/209https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/835/209http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/835/209https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/835/209https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/835/209http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/835/209GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/835/209/table1 (Orbital solution for each ellipsoidal variable)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/835/209/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/835/209/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/835/209/table1?GETtext/xml+votable180.050000true75.5933333-69.29266670.0055555555555555565/8274 6/33053 33055 33077 33089 33090 33091 33120 33121https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/835/209?format=asciiOpticaldefaultJ/ApJ/835/209/table1Orbital solution for each ellipsoidal variableSimbadNameSimbad column added by the CDSmeta.idchare_qUncertainty in qstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSet[1/4] Sample (1)src.sampleintOGLEOGLE II identifier (HHMMSS.ss+DDMMSS.s, J2000)meta.id;meta.maincharPer[65.7/662.2] Orbital perioddtime.periodfloatTeff[3710/5046] Effective TemperatureKphys.temperature.effectiveintHJD0Time of light minimum at superior conjunction; HJD-2450000.0dtime.epochfloate_HJD0Uncertainty in HJD0dstat.errorfloatVgamma[212/351] System center of mass radial velocitykm/sphys.veloc;pos.heliocentricfloate_VgammaUncertainty in Vgammakm/sstat.errorfloati[27.9/90] Inclination (2)degsrc.orbital.inclinationfloate_i? Uncertainty in idegstat.errorfloatnullablea[122/601] Semi-major axis, in solar unitssolRadphys.angSize.smajAxisfloate_aUncertainty in asolRadstat.errorfloate[0.05/0.5]? Eccentricity (3)src.orbital.eccentricityfloatnullablee_e? Uncertainty in estat.errorfloatnullableomega[0.3/7.2]? Argument of periastron, {omega}radsrc.orbital.periastronfloatnullablee_omega? Uncertainty in {omega}radstat.errorfloatnullableq[0.1/1.1] Mass ratio, qphys.massfloatOmega1[2.2/6.3] Surface potential, primary, {Omega}1arith.factor;phys.gravityfloate_Omega1Uncertainty in {Omega}1stat.errorfloatMass1[0.5/9.4] Mass, primarysolMassphys.massfloate_Mass1Uncertainty in Mass1solMassstat.errorfloatMass2[0.09/5] Mass, secondarysolMassphys.massfloate_Mass2Uncertainty in Mass2solMassstat.errorfloatRad1[40/161] Radius, primarysolRadphys.size.radiusfloatRadL1[54/284] Effective Roche lobe radius, primarysolRadphys.size.radiusfloatRad2[0/3.1] Radius, secondarysolRadphys.size.radiusfloatLum1[431/6433] Luminosity, primarysolLumphys.luminosityfloatLum2[0/807] Luminosity, secondarysolLumphys.luminosityfloatLCatDisplay data from Nie+, 2014, J/AJ/148/118 and Nicholls+, 2010, J/MNRAS/405/1770 and 2012, J/MNRAS/421/2616meta.ref.urlintnullable_RAPositions from OGLE identifiers (right ascension part)degpos.eq.ra;meta.main_DEPositions from OGLE identifiers (declination part)degpos.eq.dec;meta.main