J/A+A/695/A21ivo://CDS.VizieR/J/A+A/695/A21doi:10.26093/cds/vizier.36950021CDSYang H.Cheng X.Liu J.Liu S.Zhao Z.Zhou G.Hou Y.Gao C.Niu Z.2025-05-21T20:02:35Z2025-02-27T09:52:08ZCDS support team

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

cds-question@unistra.frstellar-activitystellar-flaresstellar-radiiThe dynamo theory has always been one of the biggest mysteries in stellar physics. One key reason for its uncertainty is poor knowledge of the dynamo process on stars except the Sun. The most important observation feature of solar dynamo is that active regions only appear at low latitudes, which provides a crucial constraint to the dynamo theory, while Doppler imaging, the current technique to spatially resolve stellar hemisphere, is difficult to distinguish the equatorial region . Hence, the latitudinal distribution of active regions (LDAR) of stars is ambiguous and controversial, mainly due to the limit of the current technique for spatially resolving the stellar surface. Fast rotating stars, which are young and active, are thought to operate with a different dynamo process than the Sun. We study their LDAR and compare them with the Sun to reveal the underlying dynamo process. Flares are drastic and observational activity events, which occur in active regions. Here, we propose a new method to study how the apparent flaring activity varies with respect to the inclination to determine the LDAR of fast rotating stars. We find that the LDAR of fast rotating stars is consistent with that of the Sun, contrary to expectations. Our results provide a crucial constraint to stellar dynamo, indicating that the solar-like dynamo also applies to fast rotating stars, even spanning different stages of their evolution.2025A&A...695A..21Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/695/A21CatalogResearchIsServedByTAP 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/A+A/695/A21https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/695/A21http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/695/A21https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/695/A21https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/695/A21http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/695/A21GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/695/A21/table (Flaring activity and inclination of 201 stars through the 4-year lightcurves of the Kepler Mission and the spectra of APOGEE)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/695/A21/table?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/695/A21/table?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/695/A21/table?GETtext/xml+votable180.050000true284.139263145.23001920.0055555555555555565/3730 3732-3733 3776 3785 6/14567 14573 14575 14579-14582 14584-14586 14589 14591 14733-14735 14744 14746 14750-14751 14753 14756-14757 14759 14762 14764-14765 14768 14771 14773-14777 14779 14781 14783 14818-14819 14824-14826 14830 14914-14915 14918-14919 14924 14936 14939-14942 14948 14950-14951 14955 14957-14959 14961-14962 14969 14971 14974 15057 15059-15060 15109 15112-15114 15119-15120 15122 15124 15126 15128-15129 15131-15134 15136-15137 15139 15146 15148 15154 15156 15158 15160 15168-15170 15172 15174https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/695/A21?format=asciidefaultJ/A+A/695/A21/tableFlaring activity and inclination of 201 stars through the 4-year lightcurves of the Kepler Mission and the spectra of APOGEESimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICThe Kepler input catalog IDmeta.id;meta.mainintTeffEffective temperatureKphys.temperature.effectivefloatloggSurface gravitylog(cm.s**-2)phys.gravityfloatRoRossby number, the ratio of rotation period to the global convective turnover timestat.paramfloatRadStellar radius derived from the SPOTS modelsolRadphys.size.radiusfloatb_siniThe lower limit of sinimeta.notefloatsiniThe sine value of the inclination anglesrc.orbital.inclinationfloatB_siniThe upper limit of sinimeta.notefloatFAFlaring activityphot.flux;arith.ratiofloatvsiniProjected rotational velocitym/sphys.veloc.rotatfloatBF[Yes/No ] Binary flagmeta.codechar_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