J/ApJ/887/203ivo://CDS.VizieR/J/ApJ/887/203doi:10.26093/cds/vizier.18870203CDSTayar J.Beck P.G.Pinsonneault M.H.Garcia R.A.Mathur S.2021-07-05T13:10:14Z2021-06-24T12:48:58ZCDS support team

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

cds-question@unistra.frstellar-masseschemical-abundancesasteroseismologyastronomical-modelsStars between two and three solar masses rotate rapidly on the main sequence, and the detection of slow core and surface rotation in the core-helium burning phase for these stars places strong constraints on their angular momentum transport and loss. From a detailed asteroseismic study of the mixed-dipole mode pattern in a carefully selected, representative sample of stars, we find that slow core rotation rates in the range reported by prior studies are a general phenomenon and not a selection effect. We show that the core rotation rates of these stars decline strongly with decreasing surface gravity during the core He-burning phase. We argue that this is a model-independent indication of significant rapid angular momentum transport between the cores and envelopes of these stars. We see a significant range in core rotation rates at all surface gravities, with little evidence for a convergence toward a uniform value. We demonstrate using evolutionary models that measured surface rotation periods are a biased tracer of the true surface rotation distribution, and we argue for using stellar models for interpreting the contrast between core and surface rotation rates. The core rotation rates we measure do not have a strong mass or metallicity dependence. We argue that the emerging data strongly favor a model where angular momentum transport is much more efficient during the core He-burning phase than in the shell-burning phases that precede and follow it.2019ApJ...887..203Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/887/203CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)J/ApJ/746/16 : Modelling the convection zone (van Saders+, 2012)J/A+A/537/A120 : Rotational velocities of A-type stars. IV. (Zorec+, 2012)J/AJ/146/133 : Stellar param. from SDSS-III APOGEE DR10 (Meszaros+, 2013)J/ApJ/776/67 : Rotational tracks (van Saders+, 2013)J/A+A/572/A34 : Pulsating solar-like stars in Kepler (Garcia+, 2014)J/A+A/572/L5 : Evol. state of red giants from seismology (Mosser+, 2014)J/ApJS/215/19 : APOKASC catalog of Kepler red giants (Pinsonneault+, 2014)J/ApJ/807/82 : Rotational velocities of APOKASC red giants (Tayar+, 2015)J/AJ/151/144 : ASPCAP weights for APOGEE chemical elements (Garcia+, 2016)J/MNRAS/456/3655 : Masses and ages of red giants (Martig+, 2016)J/ApJ/823/114 : The Cannon: a new approach to determine masses (Ness+, 2016)J/A+A/588/A87 : Seismic global parameters of 6111 KIC (Vrard+, 2016)J/A+A/605/A111 : Surface rotation of Kepler red giant stars (Ceillier+, 2017)J/ApJS/229/30 : Revised properties of Q1-17 Kepler targets (Mathur+, 2017)J/A+A/616/A24 : Rotation in RGBs from Kepler asteroseismology (Gehan+, 2018)J/ApJS/239/32 : APOKASC-2 cat. of Kepler evolved stars (Pinsonneault+, 2018)J/A+A/626/A121 : Buoyancy radius of {gamma} Dor stars (Ouazzani+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/887/203https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/887/203http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/887/203https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/887/203https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/887/203http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/887/203GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/887/203/table1 (Properties of the stars studied here)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/887/203/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/887/203/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/887/203/table1?GETtext/xml+votable180.050000true290.809818638.88235670.0055555555555555565/3689 6/14575 14579 14581 14584 14586 14588 14589 14591 14733 14735 14744 14746 14751 14752 14753 14754 14760 14761 14764 14768 14770 14771 14773 14776 14778 14779 14781 14794 14816 14824 14825 14830 14916 14925 14929 14930 14939 14940 14948 14949 14956 14964 14966 14967 14968 14971 14972 15040 15107 15110 15112 15120 15121 15129 15130 15132 15134 15137 15140 15141 15143 15145 15148 15154 15160 15168 15169 15172https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/887/203?format=asciidefaultJ/ApJ/887/203/table1Properties of the stars studied hererecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKIC[2158410/12003742] Kepler Input Cat. IDmeta.id;meta.mainintMass[1.2/3.1] Mass estimate (1)solMassphys.massfloatlogg[2.4/3.2] Log of surface gravity estimate (1)log(cm.s**-2)phys.gravityfloatTeff[4714/5196] Surface temperature (2)Kphys.temperaturefloat[Fe/H][-0.33/0.43] Metallicity (2)phys.abund.Zfloat[C/N][-1.16/-0.25] Carbon/Nitrogen abundance (2)phys.abundfloatPsurf[-160.6/165.1]? Surface rotation period (3)dtime.perioddoublenullableGroupWhy star was selected (4)meta.codecharDeltaPi[100.25/393.8]? Delta Pi (5)spos.eq.decdoublenullableq[0.1/0.5]? Coupling parameter (5)stat.fit.paramdoublenullablesplit[0.03/0.18]? Rotational splitting values (5)uHzstat.fit.paramdoublenullablePcore[32.15/193]? Core rotation period (5)dtime.perioddoublenullablePsurf-t[49.93/312.46]? Theoretical surface rotation period (6)dtime.perioddoublenullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main