J/A+A/658/A57ivo://CDS.VizieR/J/A+A/658/A57doi:10.26093/cds/vizier.36580057CDSMeunier N.Kretzschmar M.Gravet R.Mignon L.Delfosse X.2022-09-05T13:45:38Z2022-01-31T08:52:07ZCDS support team

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

cds-question@unistra.frspectroscopyf-starsmagnetic-fieldsDifferent relationships between the H{alpha} and CaII chromospheric emissions have been reported in solar-type stars. In particular, the time-series of emissions in these two lines are clearly anti-correlated for a few percent of the stars, contrary to what is observed on the Sun. Our objective is to characterise these relationships in more detail using complementary criteria, and to constrain the properties of filaments and plages that are necessary to explain the observations. We analysed the average level and variability of the H{alpha} and CaII emission for 441 F-G-K stars, paying particular attention to their (anti-)correlations on both short and long timescales. We also computed synthetic H{alpha} and CaII time-series for different assumptions of plage and filament properties and compared them with the observations. We were not able to find plage properties that, alone, are sufficient to reproduce the observations at all timescales simultaneously, even when allowing different H{alpha} and CaII emission relationships for different stars. We also specified the complex and surprising relationship between the average activity levels of both indexes, in particular for low-activity stars. We conclude that plages alone are unlikely to explain the observed variety of relationships between CaII and H{alpha} emission, and that the presence of other phenomena like filaments may help to reconcile the models with observations.2022A&A...658A..57Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/658/A57CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/658/A57https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/658/A57http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/658/A57https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/658/A57https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/658/A57http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/658/A57GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/658/A57/tablea1 (List of stars studied)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/658/A57/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/658/A57/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/658/A57/tablea1?GETtext/xml+votable180.050000true224.2958267-4.34645920.0055555555555555566/137 222 4128 4206 4313 4665 8244 8286 8614 8792 12890 16393 16518 16528 16543 16639 16652 16697 16883 17171 17177 17218 17249 17266 17301 17314 17341 17419 17425 17435 17453 17529 17540-17541 17572 17587-17588 17607 17641 17714 17721 17768 17804 17944 17954 18005 18139 18373 18548 18614-18615 18637 18641 18711 18785 18792 19003 19072 19491 19585 20125 20557 20593 20640 20746 20873 21060 21066 21080 21114 21117 21121 21177 21211 21400 21412 21477 21484 21516 21696 21779 21906 21953 22120 22159 22608 22613 22619 22708 22746 22813 22818 22823 23061 23096 23123 23137 23177 23369 23583 23661 23780 23873 24729 24769 24831 24924 24951 25056 25078 25102 25225 25231 25473 25567 25584 25622 25869 25880 25889 25906 25939 26142 26160 26183 26242 26496 26652 26676 26768 26828 26888 26901 26906 26924 27018 27254 28719 28763 28874 28894 28961 29225 29289 29675 29680 29721 29774 29833 29838 29842 29900 30343 30458 30848 30878 30943 30951 30965 31011 31029 31101 31130 31267 31433 31945 32787 32848 32912 32986 33063 33082 33091 33210 33219 33243 33357 33418 33430 33442 33456 33510 33552 33608 33630 33662 33705 33813 33838 33849 33879 33945 34004 34074 34245 34336 34442 34446 34481 34530 34817 34864 34905 34983 35121 35230 35440 35468 35691 35733 35784 35831 35858 35896 35954 35968-35969 36015 36019 36288 36453 36517 36590 36635 36664 36693 36697 36723 36813 37074 37158 37208 37419 37422 37515 37585 37595 37616 37660 37680 37780 37807-37808 37831 37944 37954-37955 38064 38099 38229 38238 38279 38311 38339 38414 38434 38443 38461 38545 38562 38605 38698 38738 38742 38765 38788 38807 38857 38932 38955 38975 38998 39034 39219 39257 39282-39283 39364 39377 39422 39461 39557 39576 39693 39767 39801 39854 39915 39921 40007 40078 40105 40317 40442 40453 40514 40679 40686-40687 40692 40722 40784 40802 40892 40938 41058 41094 41143 41204 41450 41463 41521 41553 41590 41607 41611-41612 41687 41723-41724 41752 41861 41912 41935 41941 41954 41969 42022 42146 42157 42171 42228 42326 42448 42460 42510 42595 42601 42700 42814 42845 42887 42918 43105 43150 43228 43258 43290 43327 43345 43544 43555 43649 43688 43724 43911 43977 43989 44115 44131 44150 44262 44359 44557 44792 44879 45029 45121 45228 45265 45334 45485 45502 45538 45564 45589 45621 45627 45641 45668-45669 45823 45865 45902 46056 46076 46080 46113 46135 46172 46193 46234 46247 46287 46297 46306 46355 46640 46664 46681 46734 46800 46874 46923 46933 46967 46982 46997 47020 47045 47137 47194 47205 47253 47364 47390 47590 47629 47740 47780 47858 47910 48310 48334 48355 48362 48519 48530 48545 48607 48652 48664 48705 48821 48846 48943 49060 49114 49128https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/658/A57?format=asciidefaultJ/A+A/658/A57/tablea1List of stars studiedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharB-VB-V coloud index from Simbadmagphot.color;em.opt.B;em.opt.VfloatSpTypeSpectral type from Simbad (1)src.spTypecharTeffEffective temperatureKphys.temperature.effectiveintr_TeffReference for Teff (2)meta.ref;pos.frameint[Fe/H]Metallicityphys.abund.Zfloatr_[Fe/H]Reference for metallicity (2)meta.refintNBnightsNumber of nights used in the analysismeta.numberintSpanTime span of the observationsdtime.interval;obsintlogR'HKAveraged Mount Wilson R'HK indexphot.flux;arith.ratiofloatlogIHalphaAveraged Flux in H{alpha}phot.flux;em.line.HalphafloatCorrglobGlobal correlationstat.correlationfloate_Corrglob1-sigma uncertainty on global correlationstat.errorfloatNBseasonsNumber of seasonsmeta.numberintCorrLT? Long-term correlationstat.correlationfloatnullablee_CorrLT? 1-sigma uncertainty on long-term correlationstat.errorfloatnullableNBsubsetsNumber of subsetsmeta.numberintCorrST? Short-term correlationstat.correlationfloatnullablee_CorrST? 1-sigma uncertainty on short-term correlationstat.errorfloatnullableSimbadNameSimbad column added by the CDSmeta.idcharnullable_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