J/MNRAS/469/3802ivo://CDS.VizieR/J/MNRAS/469/3802doi:10.26093/cds/vizier.74693802CDSColman I.L.Huber D.Bedding T.R.Kuszlewicz J.S.Yu J.Beck P.G.,Elsworth Y.Garcia R.A.Kawaler S.D.Mathur S.Stello D.White T.R.2024-08-17T20:19:26Z2020-06-02T10:09:41ZCDS support team

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

cds-question@unistra.frmultiple-starsgiant-starsasteroseismologyWe present an analysis of 168 oscillating red giants from NASA's Kepler mission that exhibit anomalous peaks in their Fourier amplitude spectra. These peaks result from ellipsoidal variations that are indicative of binary star systems, at frequencies such that the orbit of any stellar companion would be within the convective envelope of the red giant. Alternatively, the observed phenomenon may be due to a close binary orbiting a red giant in a triple system, or chance alignments of foreground or background binary systems contaminating the target pixel aperture. We identify 87 stars in the sample as chance alignments using a combination of pixel Fourier analysis and difference imaging. We find that in the remaining 81 cases, the anomalous peaks are indistinguishable from the target star to within 4 arcsec, suggesting a physical association. We examine a GALAXIA model of the Kepler field of view to estimate background star counts and find that it is highly unlikely that all targets can be explained by chance alignments. From this, we conclude that these stars may comprise a population of physically associated systems.2017MNRAS.469.3802Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/469/3802CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)J/ApJ/765/L41 : Asteroseismic classification of KIC objects (Stello+, 2013)J/ApJS/215/19 : APOKASC catalog of Kepler red giants (Pinsonneault+, 2014)J/ApJS/229/30 : Revised stellar properties of Q1-17 Kepler targetshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/469/3802https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/469/3802http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/469/3802https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/469/3802https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/469/3802http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/469/3802GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/469/3802/table1 (Details of the 68 presumed chance alignments)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/469/3802/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/469/3802/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/469/3802/table1?GETtext/xml+votable180.050000true291.880537.347480.005555555555555556Cone search capability for table J/MNRAS/469/3802/table2 (Details of the 19 confirmed chance alignments with a known entry in the KIC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/469/3802/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/469/3802/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/469/3802/table2?GETtext/xml+votable180.050000true291.0387236.598130.005555555555555556Cone search capability for table J/MNRAS/469/3802/table3 (*Details of the 81 possible physical associations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/469/3802/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/469/3802/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/469/3802/table3?GETtext/xml+votable180.050000true292.5044737.292780.0055555555555555565/3683 3689-3690 6/14567 14575 14577-14579 14581-14585 14587-14588 14591 14730-14731 14744 14746 14752-14753 14755 14765 14768-14769 14772-14773 14775 14777-14778 14780-14782 14792 14794 14816 14818 14825 14915 14918-14919 14922 14924 14926 14928-14929 14933 14940-14942 14947 14950-14951 14955 14960 14962 14966-14967 15040 15045 15060 15104-15106 15109 15112 15118-15119 15121-15122 15127 15130 15132-15134 15136-15137 15141 15143 15147 15149 15152 15155 15157 15160 15168-15169 15171 15174 15200https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/469/3802?format=asciidefaultJ/MNRAS/469/3802/table1Details of the 68 presumed chance alignmentsKICKIC numbermeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainlog(g)Surface gravitylog(cm.s**-2)phys.gravityfloatKpmagKepler magnitudemagphot.mag;em.optfloatTeffEffective temperatureKphys.temperature.effectiveint[Fe/H]Metallicityphys.abund.ZfloatnumaxFrequency at maximumuHzem.freq;src.varfloatn_nupeak[+*] Note on nupeak (1)meta.notecharnupeakPeak frequencyuHzem.freq;stat.maxfloatPpeakPeak perioddtime.period;stat.maxfloatCont? Contaminated KIC number (only in table2)meta.id.associntnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/469/3802/table2Details of the 19 confirmed chance alignments with a known entry in the KICrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKIC numbermeta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainlog(g)Surface gravitylog(cm.s**-2)phys.gravityfloatKpmagKepler magnitudemagphot.mag;em.optfloatTeffEffective temperatureKphys.temperature.effectiveint[Fe/H]Metallicityphys.abund.ZfloatnumaxFrequency at maximumuHzem.freq;src.varfloatn_nupeak[+*] Note on nupeak (1)meta.notecharnupeakPeak frequencyuHzem.freq;stat.maxfloatPpeakPeak perioddtime.period;stat.maxfloatCont? Contaminated KIC number (only in table2)meta.id.associntnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/469/3802/table3*Details of the 81 possible physical associationsKICKIC numbermeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainlog(g)Surface gravitylog(cm.s**-2)phys.gravityfloatKpmagKepler magnitudemagphot.mag;em.optfloatTeffEffective temperatureKphys.temperature.effectiveint[Fe/H]Metallicityphys.abund.ZfloatnumaxFrequency at maximumuHzem.freq;src.varfloatn_nupeak[+*] Note on nupeak (1)meta.notecharnupeakPeak frequencyuHzem.freq;stat.maxfloatPpeakPeak perioddtime.period;stat.maxfloatCont? Contaminated KIC number (only in table2)meta.id.associntnullableSimbadSimbad column added by the CDSmeta.ref.urlchar