J/ApJ/928/188ivo://CDS.VizieR/J/ApJ/928/188doi:10.26093/cds/vizier.19280188CDSDhanpal S.Benomar O.Hanasoge S.Kundu A.Dhuri D.Das D.Kaul B.2024-11-06T20:24:25Z2024-04-05T12:43:11ZCDS support team

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

cds-question@unistra.frasteroseismologygiant-starsAsteroseismology is used to infer the interior physics of stars. The Kepler and TESS space missions have provided a vast data set of red-giant lightcurves, which may be used for asteroseismic analysis. These data sets are expected to significantly grow with future missions such as PLATO, and efficient methods are therefore required to analyze these data rapidly. Here, we describe a machine-learning algorithm that identifies red giants from the raw oscillation spectra and captures p- and mixed-mode parameters from the red-giant power spectra. We report algorithmic inferences for large frequency separation ({Delta}{nu}), frequency at maximum amplitude ({nu}_max_), and period separation ({Delta}{Pi}) for an ensemble of stars. In addition, we have discovered ~25 new probable red giants among 151000 Kepler long-cadence stellar-oscillation spectra analyzed by this method, among which four are binary candidates that appear to possess red-giant counterparts. To validate the results of this method, we selected ~3000 Kepler stars, at various evolutionary stages ranging from subgiants to red clumps, and compare inferences of {Delta}{nu}, {Delta}{Pi}, and {nu}_max_ with estimates obtained using other techniques. The power of the machine-learning algorithm lies in its speed: It is able to accurately extract seismic parameters from 1000 spectra in ~5s on a modern computer (a single core of the Intel(r) Xeon(r) Platinum 8280 CPU).2022ApJ...928..188Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/928/188CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)J/A+A/525/A131 : Solar-like oscillations in Kepler red giants (Hekker+, 2011)J/ApJ/749/152 : Asteroseismic analysis of solar-type stars (Mathur+, 2012)J/A+A/540/A143 : Oscillations of Kepler red giants (Mosser+, 2012)J/ApJ/765/L41 : Asteroseismic classification of KIC objects (Stello+, 2013)J/ApJS/210/1 : Asteroseismic study of solar-type stars (Chaplin+, 2014)J/A+A/572/L5 : Evolution of red giants from seismology (Mosser+, 2014)J/ApJS/215/19 : APOKASC catalog of Kepler red giants (Pinsonneault+, 2014)J/ApJ/827/50 : Kepler faint red giants (Mathur+, 2016)J/A+A/588/A87 : Seismic global parameters of 6111 KIC (Vrard+, 2016)J/A+A/600/A1 : Coupling factors of 5166 KIC (Mosser+, 2017)J/A+A/598/A62 : KIC red giants showing depressed mixed modes (Mosser+, 2017)J/A+A/616/A24 : Rotation in RGBs from Kepler asteroseismology (Gehan+, 2018)J/A+A/618/A109 : Seismic global parameters of 372 KIC (Mosser+, 2018)J/ApJS/239/32 : APOKASC-2 cat. of Kepler evolved stars (Pinsonneault+, 2018)J/A+A/616/A94 : KIC red giants radial mode amplitudes (Vrard+, 2018)J/ApJS/236/42 : Asteroseismology of ~16000 Kepler red giants (Yu+, 2018)J/MNRAS/489/4641 : APOKASC Evol. state of red-giant stars (Elsworth+, 2019)J/MNRAS/485/5616 : Red giant solar-like oscillations in Kepler (Hon+, 2019)J/A+A/639/A63 : Active red giants asteroseismic & rotation (Gaulme+, 2020)J/MNRAS/493/1388 : Asteroseismology of Kepler luminous red giants (Yu+, 2020)J/A+A/648/A113 : Kepler red giants in EBs RVs (Benbakoura+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/928/188https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/928/188http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/928/188https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/928/188https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/928/188http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/928/188GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/928/188/giants (Seismic parameters of the new giant stars discovered by machine-learning (Table C1) and red-giant stars previously identified in Hon+ 2019, J/MNRAS/485/5616 (Table C2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/928/188/giants?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/928/188/giants?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/928/188/giants?GETtext/xml+votable180.050000true290.6236937.17736390.0055555555555555565/3740-3741 3776 3788 6/14567 14573 14578-14579 14582-14584 14586-14588 14591 14733-14735 14744 14749-14751 14753-14754 14756 14758 14762-14763 14770-14771 14773 14776 14779 14781-14782 14816 14824-14825 14827 14915 14917 14919-14921 14925 14929-14934 14936 14940 14942 14944 14947-14948 14955 14957-14959 14969-14970 14972-14974 15040-15041 15043 15057 15060 15108 15110 15112 15116 15118-15121 15123-15124 15127 15129-15133 15135-15137 15140-15141 15143 15148-15149 15156-15158 15168 15170-15173 15178https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/928/188?format=asciidefaultJ/ApJ/928/188/giantsSeismic parameters of the new giant stars discovered by machine-learning (Table C1) and red-giant stars previously identified in Hon+ 2019, J/MNRAS/485/5616 (Table C2)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefn=newly identified giant star or h=red-giant star detected in Hon+ 2019, J/MNRAS/485/5616meta.bibcharSeq[1/195] Running sequence numbermeta.idintKIC[1161491/100000928] KIC identifier (1)meta.id;meta.mainlongdelnu[4.2/19] Frequency separation, {Delta}{nu}uHzem.freq;src.varfloate_delnu[0.03/1.7] delnu uncertaintyuHzstat.errorfloatdelpi[41.2/332.1] Period separation, {Delta}{Pi}stime.period;arith.difffloate_delpi[0.8/207] delpi uncertaintysstat.errorfloatnumax[28.6/256.5] The p-mode frequency at maximum power, {nu}_max_uHzem.freq;src.varfloate_numax[0.026/18.4] numax uncertaintyuHzstat.errorfloatH19Display data from Hon+ 2019, J/MNRAS/485/5616meta.ref.urlintnullableMASTDisplay the Kepler online data from MAST (https://archive.stsci.edu/kepler/) for this objectmeta.ref.urlchar_RAPositions from the KIC cat. (V/133) (right ascension part)degpos.eq.ra;meta.mainnullable_DEPositions from the KIC cat. (V/133) (declination part)degpos.eq.dec;meta.mainnullable