J/A+A/626/A121ivo://CDS.VizieR/J/A+A/626/A121doi:10.26093/cds/vizier.36260121CDSOuazzani R.-M.Marques J.P.Goupil M-J.Christophe S.Antoci V.,Salmon S.J.A.J.Ballot J.2019-07-26T09:28:21Z2019-06-21T08:45:09ZCDS support team

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

cds-question@unistra.frasteroseismologyvariable-starsHelioseismology and asteroseismology of red giant stars have shown that distribution of angular momentum in stellar interiors, and the evolution of this distribution with time remains an open issue in stellar physics. Owing to the unprecedented quality and long baseline of Kepler photometry, we are able to seismically infer internal rotation rates in {gamma} Doradus stars, which provide the main-sequence counterpart to the red-giants puzzle. Here, we confront these internal rotation rates to stellar evolution models which account for rotationally induced transport of angular momentum, in order to test angular momentum transport mechanisms. On the one hand, we used a stellar model-independent method developed by our team in order to obtain accurate, seismically inferred, buoyancy radii and near-core rotation for 37 {gamma} Doradus stars observed by Kepler. We show that the stellar buoyancy radius can be used as a reliable evolution indicator for field stars on the main sequence. On the other hand, we computed rotating evolutionary models of intermediate-mass stars including internal transport of angular momentum in radiative zones, following the formalism developed in the series of papers started by Zahn (1992A&A...265..115Z), with the cestam code. This code calculates the rotational history of stars from the birth line to the tip of the RGB. The initial angular momentum content has to be set initially, which is done here by fitting rotation periods in young stellar clusters. We show a clear disagreement between the near-core rotation rates measured in the sample and the rotation rates obtained from the evolutionary models including rotationally induced transport of angular momentum following Zahn's prescriptions. These results show a disagreement similar to that of the Sun and red giant stars in the considered mass range. This suggests the existence of missing mechanisms responsible for the braking of the core before and along the main sequence. The efficiency of the missing mechanisms is investigated. The transport of angular momentum as formalized by Zahn and Maeder cannot explain the measurements of near-core rotation in main-sequence intermediate-mass stars we have at hand.2019A&A...626A.121Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/626/A121CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/626/A121https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/626/A121http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/626/A121https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/626/A121https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/626/A121http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/626/A121GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/626/A121/obs (Buoyancy radii and near-core rotation frequencies for 37 {gamma} Dors observed by Kepler)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/626/A121/obs?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/626/A121/obs?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/626/A121/obs?GETtext/xml+votable180.050000true290.8888137.98348750.0055555555555555566/14582 14584 14591 14730 14733 14746 14753-14754 14763 14770 14776 14794 14825 14830 14928 14932 14936 14938-14939 14942 14955 14958 14960 15057 15105 15107 15130-15131 15133 15155 15168-15169 15171 15176https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/626/A121?format=asciidefaultJ/A+A/626/A121/obsBuoyancy radii and near-core rotation frequencies for 37 {gamma} Dors observed by KeplerBRBuoyancy radiussphys.angSizedoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKIC numbermeta.id;meta.maininte_BRUncertainty on buoyancy radiussstat.errordoubleNurotNear-core rotation frequencyuHzem.freqfloate_NurotUncertainty on near-core rotation frequencyuHzstat.errorfloatSimbadSimbad 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.mainJ/A+A/626/A121/listList of files files buoyancy radii and near-core rotation frequencyComModel informationsmeta.noterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFileNameName of the file with buoyancy radii and near-core rotation frequency in subdirectory filesmeta.id;em.freq;meta.filechar