J/MNRAS/532/563ivo://CDS.VizieR/J/MNRAS/532/563doi:10.26093/cds/vizier.75320563CDSSouza dos Santos P.V.Porto de Mello G.F.Costa-Bhering E.,Lorenzo-Oliveira D.Almeida-Fernandes F.Dutra-Ferreira L.Ribas I.2025-02-13T20:15:41Z2024-11-15T12:00:01ZCDS support team

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

cds-question@unistra.frf-starsstellar-agesspectroscopyvisible-astronomyh-alpha-photometryExcess chromospheric emissions within deep photospheric lines are effective proxies of stellar magnetism for FGK stars. This emission decays with stellar age and is a potential determinant of this important stellar quantity. We report absolutely calibrated H{alpha} chromospheric fluxes for 511 solar-type stars in a wide interval of precisely determined masses, [Fe/H], ages, and evolution states from high S/N, moderately high-resolution spectra. The comparison of H{alpha} and H+K chromospheric fluxes reveals a metallicity bias (absent from H{alpha}) affecting Ca II H+K fluxes thereby metal-rich stars with deep line profiles mimic low chromospheric flux levels, and vice versa for metal-poor stars. This bias blurs the age-activity relation, precluding age determinations for old, inactive stars unless mass and [Fe/H] are calibrated into the relation. The H+K lines being the most widely studied tool to quantify magnetic activity in FGK stars, care should be exercised in its use whenever wide ranges of mass and [Fe/H] are involved. The H{alpha} age-activity-mass-metallicity calibration appears to be in line with the theoretical expectation that (other parameters being equal) more massive stars possess narrower convective zones and are less active than less massive stars, while more metal-rich stars have deeper convective zones and appear more active than metal-poorer stars. If regarded statistically in tandem with other age diagnostics, H{alpha} chromospheric fluxes may be suitable to constrain ages for FGK stars with acceptable precision.2024MNRAS.532..563Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/532/563CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/839/94 : Abundances of solar twins from Keck/HIRES (Bedell+, 2017)J/A+A/619/A73 : Solar twins age-chromospheric activityJ/MNRAS/529/2946 : Abundance catalogue of solar twins in GALAH (Walsen+, 2024)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/532/563https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/532/563http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/532/563https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/532/563https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/532/563http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/532/563GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/532/563/table3 (Atmospheric parameters collected from the literature and the final values used in this paper for the stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/532/563/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/532/563/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/532/563/table3?GETtext/xml+votable180.050000true1.4689367-41.75306810.0055555555555555566/137 185 222 311 322 333 342 461 463 474 496 679 684 934 987 1032 1043 1657 2317 2366 4278 4591 4634 4665 4762 4808 4942 5009 5074 5304 5309 5670 6153 6226 6308 8210 8224 8286 8296 8357 8424 8444 8466 8602 8614 8716 8788 8843 8845 8995 9403 9476 9492 10375 12295 12397 12464-12465 12526 12592 12634 12704 12846 12944 12983 13025 13474 13733 14084 14347 14375 14411 14416 14419 14459 14539 14650 14901 16386 16422 16440 16518 16678-16679 16689 16810 16883 17137 17219 17266 17314 17425 17469 17486 17496 17513 17540 17576 17606 17721 17730 17804 17847 17860 17918 18139 18209 18289 18327 18366 18373 18614 18636-18637 18658 18821 19217 19312 19424 19904 19912 20043 20145 20278 20328 20640 20739 20753 21060 21117 21177 21179 21185 21386 21568 21580 21696 21726 21901 22157 22654 22746 22818 22878 23096 23140 23190 23201 23230 23342 23382 23479 23489 23497 23503 23527 23537-23538 23544-23546 23548 23575 23774 23938 24028 24151 24192 24194 24212 24634 24713 24721 24729 24759 24809 24902 24924 25140 25229 25397 25407 25444 25555 25567 25578 25862 25869-25870 25875 25920 25930 25966 26125 26379 26440 26462 26521 26549 26575 26582 26636 26828 26888 27040 27088 27143 27255 27462 27661 27741 27759 27831 27910 27973 27975 28122 28494 28605 28696 28715 28719 28763 28792 28815 28987 29084 29196 29210 29291 29327 29541 29598 29640 29756 30015 30195 30526 30529 30576 30579 30665 30720 30837 30848 30878 30919 30965 30989 31015 31029 31101 31130 31132 31172 31204 31279 31287 31393 31399 31416 31433 31478 31503 31751 31966 31984 32083 32158 32297 32357 32552 32575 32645 32684 32812 32930 33160 33201 33219 33224 33252 33281 33456 33552 33717 33818 33849 34096 34199 34379 34442 34446 34519 34581 34626 34754 34817 34825 34864 34896 34905 34972 35064 35079 35121 35180 35196 35351 35497 35552-35553 35753 35802 35928 35948 35968 36008 36115 36365 36379 36527 36590 36664 36693 36697 36762 36784 37088 37094 37232 37408 37479 37595 37732 37808 38216 38238 38434 38562 38570 38698 38932 38955 39023 39025 39030 39096 39112 39118 39154 39213 39225 39227 39284 39305 39500 39709 39781 39854 40073 40078 40105 40146 40197 40242 40317 40692 40716 40892 40932 41143 41272 41463 41564 41612 41687 41763 41853 41935 41941 42042 42044 42228 42248 42281 42285 42287 42319 42326 42457 42463 42515 42559 42700 42706 42724 42760 42769 42794 42845 42874 42887 42890 42899 42955 43017 43093 43296 43362 43544 43577 43595 43639 43782 43797 43804 43977 43989 43998 44131 44180 44221 44260 44284 44514 44557 44600 44891 45111 45143 45228 45272 45343 45364 45421 45485 45535 45564 45668-45669 45865 45888 45917 45927 45941 45962 46076 46112 46170 46193 46247 46297 46306 46320 46394 46625 46640 46681 46967 46997 47137 47308 47351 47360-47361 47377 47407 47409 47589 47710 47740 47745 47910 47997 48105 48146 48254 48291 48362 48613 48652 48664 48705 48736 48821 48870 48923 48955 49026 49042 49060 49114 49128https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/532/563?format=asciiOpticaldefaultJ/MNRAS/532/563/table3Atmospheric parameters collected from the literature and the final values used in this paper for the starsSimbadSimbad column added by the CDSmeta.ref.urlcharNameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTefflit? Effective temperature compiled from the literatureKphys.temperature.effectiveintnullable[Fe/H]litIron to hydrogen abundance ratio compiled from the literaturephys.abund.Fefloatlogglit? Surface gravity compiled from the literaturelog(cm.s**-2)phys.gravityfloatnullabler_TefflitReference of the atmospheric parameters compiled, in refs.dat filemeta.ref;pos.framecharTeffEffective temperature adopted in this workKphys.temperature.effectiveinte_Teff? Effective temperature errorKstat.error;phys.temperature.effectiveintnullable[Fe/H]Iron to hydrogen abundance ratio adopted in this workphys.abund.Fe;arith.ratiofloatloggSurface gravity adopted in this worklog(cm.s**-2)phys.gravityfloate_loggSurface gravity errorlog(cm.s**-2)stat.errorfloat_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/MNRAS/532/563/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notecharRefReference codemeta.notecharJ/MNRAS/532/563/table4Bolometric correction and magnitude, luminosity, radius, mass and age for the starsNameStar name (including Sun)meta.id;meta.maincharBCBolometric correctionmagphot.mag.bccharMbolBolometric magnitudemagphys.magAbs.bolfloate_MbolBolometric magnitude errormagstat.errorfloatLumLuminositysolLumphys.luminosityfloate_LumLuminosity errorsolLumstat.errorfloatRadRadiussolRadphys.size.radiusfloate_RadRadius errorsolRadstat.errorfloatMassMasssolMassphys.massfloate_MassMass errorsolMassstat.error;phys.massfloatAge? AgeGyrtime.agefloatnullablee_Age? Age error (inferior)Gyrstat.error;time.agefloatnullableE_Age? Age error (superior)Gyrstat.error;stat.maxfloatnullableNote[*A] Note (1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ/MNRAS/532/563/table5Final total and purely chromospheric fluxes for the starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (including Sun)meta.id;meta.maincharFtotalH{alpha} total absolute flux (M.erg/cm^2^/s)1000W.m**-2phot.flux;em.line.HalphafloatFchromH{alpha} chromospheric absolute flux1000W.m**-2phot.flux;em.line.Halphafloate_FchromH{alpha} chromospheric absolute flux error1000W.m**-2stat.errorfloatJ/MNRAS/532/563/table10Chromospheric ages for the starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (including Sun)meta.id;meta.maincharAgeHaH{alpha} chromospheric ageGyrtime.agefloatE_AgeHaH{alpha} chromospheric age upper errorGyrstat.error;stat.maxfloate_AgeHaH{alpha} chromospheric age lower errorGyrstat.errorfloatAgeHKHK chromospheric ageGyrtime.agefloatE_AgeHKH{alpha} chromospheric age upper errorGyrstat.error;stat.maxfloate_AgeHKH{alpha} chromospheric age lower errorGyrstat.errorfloat