J/ApJ/827/50ivo://CDS.VizieR/J/ApJ/827/50doi:10.26093/cds/vizier.18270050CDSMathur S.Garcia R.A.Huber D.Regulo C.Stello D.Beck P.G.,Houmani K.Salabert D.2018-02-02T10:34:12Z2017-01-03T12:56:38ZCDS support team

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

cds-question@unistra.frgiant-starseffective-temperaturestellar-massesstellar-distanceAsteroseismology has proven to be an excellent tool to determine not only global stellar properties with good precision, but also to infer the stellar structure, dynamics, and evolution for a large sample of Kepler stars. Prior to the launch of the mission, the properties of Kepler targets were inferred from broadband photometry, leading to the Kepler Input Catalog (KIC). The KIC was later revised in the Kepler Star Properties Catalog, based on literature values and an asteroseismic analysis of stars that were unclassified in the KIC. Here, we present an asteroseismic analysis of 45400 stars that were classified as dwarfs in the Kepler Star Properties Catalog. We found that around 2% of the sample shows acoustic modes in the typical frequency range that put them in the red-giant category rather than the cool dwarf category. We analyze the asteroseismic properties of these stars, derive their surface gravities, masses, and radii, and present updated effective temperatures and distances. We show that the sample is significantly fainter than the previously known oscillating giants in the Kepler field, with the faintest stars reaching down to a Kepler magnitude of Kp~16. We demonstrate that 404 stars are at distances beyond 5kpc and that the stars are significantly less massive than for the original Kepler red-giant sample, consistent with a population of distant halo giants. A comparison with a galactic population model shows that up to 40 stars might be genuine halo giants, which would increase the number of known asteroseismic halo stars by a factor of 4. The detections presented here will provide a valuable sample for galactic archeology studies.2016ApJ...827...50Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/827/50CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)J/ApJS/211/2 : Revised properties of Q1-16 Kepler targets (Huber+, 2014)J/ApJ/767/127 : Asteroseismic solutions for 77 Kepler stars (Huber+, 2013)J/ApJ/767/95 : Improved parameters of smallest KIC stars (Dressing+, 2013)J/ApJ/765/L41 : Asteroseismic classification of KIC objects (Stello+, 2013)J/ApJ/753/90 : Parameters of K5 and later type Kepler stars (Mann+, 2012)J/A+A/543/A160 : Normalized spectra of 82 Kepler red giants (Thygesen+, 2012)J/MNRAS/423/122 : Abundances of 93 solar-type Kepler targets (Bruntt+, 2012)J/A+A/540/A143 : Oscillations of red giants observed by Kepler (Mosser+, 2012)J/ApJS/199/30 : Eff. temperature scale for KIC stars (Pinsonneault+, 2012)J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)http://exoplanetarchive.ipac.caltech.edu/ : NASA exoplanet archivehttp://archive.stsci.edu/kepler/ : MAST Kepler home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/827/50https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/827/50http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/827/50https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/827/50https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/827/50http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/827/50GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/827/50/table3 (Properties of the red giants with modes near or above the Nyquist frequency from the A2Z+ pipeline)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/827/50/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/827/50/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/827/50/table3?GETtext/xml+votable180.050000true291.8507736.919188890.005555555555555556Cone search capability for table J/ApJ/827/50/table1 (Seismic and fundamental parameters of the misclassified red giants obtained for the A2Z+ pipeline (Mathur+ 2010A&A...511A..46M))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/827/50/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/827/50/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/827/50/table1?GETtext/xml+votable180.050000true291.2523836.601688060.0055555555555555564/922 5/3645 3646 3647 3692 3694 3695 3706 3729 3730 3732 3733 3734 3736 3739 3742 3743 3776 3778 3780 3782 3784 3785 3787 3789 3792 6/14559 14567 14573 14575 14577 14578 14579 14730 14733 14734 14735 14744 14746 14750 14751 14773 14775 14792 14794 14795 14816 14818 14819 14828 14914 14915 14924 14925 14926 14940 14941 14942 14948 14949 14950 14953 14955 14960 14961 14963 14964 14966 14967 15041 15043 15044 15045 15057 15060 15061 15109 15110 15111 15116 15118 15119 15124 15126 15127 15132 15134 15135 15144 15145 15147 15153 15154 15155 15160 15172 15173 15200 15232https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/827/50?format=asciidefaultJ/ApJ/827/50/table2Seismic and fundamental parameters of the misclassified red giants obtained for the SYD pipeline (Huber+ 2009CoAst.160...74H)Teffr[3766/6103] Revised Effective TemperatureKphys.temperature.effectiveintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKIC[893233/12833657] Kepler Input Catalog numbermeta.id;meta.mainintE_Teffr[77/1023] Upper Uncertainty in TeffrKstat.error;stat.maxinte_Teffr[75/846] Lower Uncertainty in TeffrKstat.errorintdnu[0.2/19.1] Frequency Separation (G1)uHzem.freq;src.varfloate_dnu[0.01/0.7] Uncertainty in dnuuHzstat.errorfloatnumax[1/249] Maximum power mode (G1)uHzem.freq;src.varfloate_numax[0/13] Uncertainty in numaxuHzstat.errorfloatlogg[0.8/3.4] Log surface gravity from scaling relationslog(cm.s**-2)phys.gravityfloate_logg[0.01/0.08] Uncertainty in logglog(cm.s**-2)stat.errorfloatMass[0.3/4.1] Stellar Mass from scaling relationssolMassphys.massfloate_Mass[0.02/0.6] Uncertainty in MasssolMassstat.error;phys.massfloatRad[3.7/69.2] Stellar Radius from scaling relationssolRadphys.size.radiusfloate_Rad[0.07/13] Uncertainty in RadsolRadstat.errorfloatDist[0.2/40.3] Distance from isochrone fitting (1)kpcpos.distance;pos.heliocentricfloate_Dist[0.01/12] Lower Uncertainty in Distkpcstat.errorfloatE_Dist[0.01/19] Upper Uncertainty in Distkpcstat.error;stat.maxfloatJ/ApJ/827/50/table3Properties of the red giants with modes near or above the Nyquist frequency from the A2Z+ pipelineKIC[1296817/11666333] Kepler Input Catalog numbermeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKpmag[11.1/15.4] Kepler Magnitudemagphot.mag;em.optfloatTeff[4750/5385] Effective TemperatureKphys.temperature.effectiveinte_Teff[95/107] Uncertainty in TeffKstat.error;phys.temperature.effectiveintdnu[14.3/26.4] Frequency Separation (G1)uHzem.freq;src.varfloate_dnu[0.08/3] Uncertainty in dnuuHzstat.errorfloatnumax[285/370] Maximum power mode (G1)uHzem.freq;src.varfloate_numax[20/25] Uncertainty in numaxuHzstat.errorfloatlogg[3.3/3.5] Log surface gravitylog(cm.s**-2)phys.gravityfloate_logg[0.03] Uncertainty in logglog(cm.s**-2)stat.errorfloatCrowd[0.6/1] Crowding (G2)phot.flux;arith.ratiofloatH14Display data from Huber+, 2014, J/ApJS/211/2 for this starmeta.ref.urlchar_RAPositions from Kepler Input Catalog (V/133) (right ascension part)degpos.eq.ra;meta.main_DEPositions from Kepler Input Catalog (V/133) (declination part)degpos.eq.dec;meta.mainJ/ApJ/827/50/table1Seismic and fundamental parameters of the misclassified red giants obtained for the A2Z+ pipeline (Mathur+ 2010A&A...511A..46M)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPDisplay the seismic parameters from the SYD pipelinemeta.ref.urlintnullableKIC[893233/12833657] Kepler Input Catalog numbermeta.id;meta.mainintprimaryStageDisplay the evolutionary stage and period spacing for this red giantmeta.ref.urlintnullableKpmag[7.4/17] Kepler Magnitudemagphot.mag;em.optfloatTeff[3225/5876] Effective Temperature from Huber et al. (2014, J/ApJS/211/2)Kphys.temperature.effectiveintE_Teff[0/611] Upper Uncertainty in TeffKstat.error;stat.maxinte_Teff[0/627] Lower Uncertainty in TeffKstat.error;phys.temperature.effectiveintTeffr[3838/6182]? Revised Effective Temperature (1)Kphys.temperature.effectiveintnullableE_Teffr[78/746]? Upper Uncertainty in TeffrKstat.error;stat.maxintnullablee_Teffr[76/736]? Lower Uncertainty in TeffrKstat.errorintnullablednu[0.2/20.3]? Frequency Separation (G1)uHzem.freq;src.varfloatnullablee_dnu[0/4]? Uncertainty in dnuuHzstat.errorfloatnullablenumax[1/269.3] Maximum power mode (G1)uHzem.freq;src.varfloate_numax[0.1/39] Uncertainty in numaxuHzstat.errorfloatlogg[0.9/3.4] Log surface gravity from scaling relationslog(cm.s**-2)phys.gravityfloate_logg[0.01/0.2] Uncertainty in logglog(cm.s**-2)stat.errorfloatMass[0.3/4.7]? Stellar Mass from scaling relationssolMassphys.massfloatnullablee_Mass[0.05/2.5]? Uncertainty in MasssolMassstat.error;phys.massfloatnullableRad[3/102]? Stellar Radius from scaling relationssolRadphys.size.radiusfloatnullablee_Rad[0.1/64]? Uncertainty in RadsolRadstat.errorfloatnullableCrowd[0.3/6.5]? Crowding (G2)phot.flux;arith.ratiofloatnullableFlagFlag (2)meta.code.errorcharDist[0.2/42.6]? Distance from isochrone fitting (1)kpcpos.distance;pos.heliocentricfloatnullablee_Dist[0.02/15]? Lower Uncertainty in Distkpcstat.errorfloatnullableE_Dist[0.01/23]? Upper Uncertainty in Distkpcstat.error;stat.maxfloatnullableH14Display data from Huber+, 2014, J/ApJS/211/2 for this starmeta.ref.urlchar_RAPositions from Kepler Input Catalog (V/133) (right ascension part)degpos.eq.ra;meta.main_DEPositions from Kepler Input Catalog (V/133) (declination part)degpos.eq.dec;meta.mainJ/ApJ/827/50/table4Evolutionary stage and period spacing for 279 misclassified red giantsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKIC[1160684/12690972] Kepler Input Catalog numbermeta.id;meta.mainintdPer[10.5/304.8] Median Period Spacingstime.period;stat.medianfloatStageEvolutionary Stage (1)src.classchar