J/MNRAS/495/2363ivo://CDS.VizieR/J/MNRAS/495/2363doi:10.26093/cds/vizier.74952363CDSLi Y.Bedding T.R.Li T.Bi S.Stello D.Zhou Y.White T.R.2024-08-21T20:14:37Z2020-07-28T14:03:23ZCDS support team

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

cds-question@unistra.frg-starslate-type-starsasteroseismologyThe presence of mixed modes makes subgiants excellent targets for asteroseismology, providing a probe for the internal structure of stars. Here we study 36 Kepler subgiants with solar-like oscillations and report their oscillation mode parameters. We performed a so-called peakbagging exercise, i.e. estimating oscillation mode frequencies, linewidths, and amplitudes with a power spectrum model, fitted in the Bayesian framework and sampled with a Markov Chain Monte Carlo algorithm. The uncertainties of the mode frequencies have a median value of 0.180uHz. We obtained seismic parameters from the peakbagging, analysed their correlation with stellar parameters, and examined against scaling relations. The behaviour of seismic parameters (e.g. {Delta}{nu}, {nu}_max_, {epsilon}_p_) is in general consistent with theoretical predictions. We presented the observational p-g diagrams: {gamma}_1_-{Delta}u for early subgiants and {Delta}{Pi}_1_-{Delta}u for late subgiants, and demonstrate their capability to estimate stellar mass. We also found a logg dependence on the linewidths and a mass dependence on the oscillation amplitudes and the widths of oscillation excess. This sample will be valuable constraints for modelling stars and studying mode physics such as excitation and damping.2020MNRAS.495.2363Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/495/2363CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/495/2363https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/495/2363http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/495/2363https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/495/2363https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/495/2363http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/495/2363GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/495/2363/table1 (Observational properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/495/2363/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/495/2363/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/495/2363/table1?GETtext/xml+votable180.050000true291.824929738.11319310.0055555555555555566/14585 14754 14757 14762 14770 14777 14794 14826-14827 14923 14925-14926 14931 14933 14939 14941 14955 14961 14969 14972 15104 15106 15124 15127-15129 15131-15132 15141 15154 15157 15169https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/495/2363?format=asciidefaultJ/MNRAS/495/2363/table1Observational properties_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.recordintKICKepler IDmeta.id;meta.mainintNicknameNicknamemeta.idchartobs? Observation durationdtime.duration;obsfloatnullableTeff? Effective temperatureKphys.temperature.effectiveintnullablee_Teff? Uncertainty of effective temperatureKstat.error;phys.temperature.effectivefloatnullablelogg? Surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_logg? Uncertainty of surface gravitylog(cm.s**-2)stat.errorfloatnullable[Fe/H]? Metallicityphys.abund.Zfloatnullablee_[Fe/H]? Uncertainty of Metallicitystat.error;phys.abund.Fefloatnullabler_[Fe/H]References for Metallicity (1)meta.refcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainJ/MNRAS/495/2363/table2Mode parameters obtained from the peakbagging (these are m=0 modes)AmpAmplitude(10-6)src.var.amplitudefloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKepler IDmeta.id;meta.mainintlAngular degreestat.fit.paramintfcFrequency centroiduHzem.freqfloate_fcUncertainty of frequency centroiduHzstat.errorfloatlwLinewidthuHzspect.line.widthfloate_lwUncertainty of linewidthuHzstat.errorfloate_AmpUncertainty of amplitude(10-6)stat.errorfloatlnK? Bayes factorstat.fit.paramdoublenullablen_lnK[i] i for infinitymeta.notechare_lnK? Uncertainty of Bayes factorstat.errorfloatnullableJ/MNRAS/495/2363/table3Global Oscillation parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKepler IDmeta.id;meta.mainintDnuLarge separation (separation between adjacent radial modes)uHzem.freq;src.varfloate_DnuUncertainty of large separationuHzstat.errorfloatepspEpsilon, offset of the patternstat.fit.paramfloate_epspUncertainty of epsilonstat.errorfloatnumaxFrequency of maximum poweruHzem.freq;stat.maxfloate_numaxUncertainty of frequency of maximum poweruHzstat.errorfloatAmaxMaximum amplitude(10-6)src.var.amplitudefloate_AmaxUncertainty of maximum amplitude(10-6)stat.errorfloatWidthWidth of GaussianuHzsrc.var.amplitudefloate_WidthUncertainty of width of GaussianuHzstat.error;spect.line.widthfloatdnu02? Small separation between 0 and 2uHzem.freq;src.varfloatnullablee_dnu02? Uncertainty of small separation between 0 and 2uHzstat.errorfloatnullablednu03? Small separation between 0 and 3uHzem.freq;src.varfloatnullablee_dnu03? Uncertainty of small separation between 0 and 3uHzstat.errorfloatnullablegamma1? First (n=1) g mode frequencyuHzsrc.var.amplitudefloatnullablee_gamma1? Uncertainty of first (n=1) g mode frequencyuHzstat.errorfloatnullableDPi1? g mode period spacing, {DELTA}{PI}_1_sinstr.setupfloatnullablee_DPi1? Uncertainty of g mode period spacingsstat.errorfloatnullableJ/MNRAS/495/2363/table4Fit parameters of the Gamma - nu relatione_DGamma-dip? Uncertainty of dip parameter amplitudeuHzstat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKepler IDmeta.id;meta.mainintlwmaxLinewidth at numaxuHzspect.line.widthfloate_lwmaxUncertainty of linewidth at numaxuHzstat.errorfloatalphaPower-law indexspect.indexfloate_alphaUncertainty of power-law indexstat.error;pos.eq.rafloatGamma-alpha? ConstantuHzstat.fit.paramfloatnullablee_Gamma-alpha? Uncertainty of constantuHzstat.errorfloatnullableDGamma-dip? Dip parameter amplitudeuHzsrc.var.amplitudefloatnullablenu-dip? Dip parameter frequencyuHzem.freqfloatnullablee_nu-dip? Uncertainty of dip parameter frequencyuHzstat.errorfloatnullableW-dip? Dip parameter widthuHzsrc.var.amplitudefloatnullablee_W-dip? Uncertainty of dip parameter widthuHzstat.errorfloatnullableFWHM? Dip FWHMuHzspect.line.widthfloatnullablee_FWHM? Uncertainty of dip FWHMuHzstat.error;phys.angSizefloatnullableA-dip? Dip AmplitudeuHz**-1src.var.amplitudefloatnullablee_A-dip? Uncertainty of dip amplitudeuHz**-1stat.errorfloatnullable