J/MNRAS/496/5039ivo://CDS.VizieR/J/MNRAS/496/5039doi:10.26093/cds/vizier/bg-fg-4xfCDSDe Somma G.Marconi M.Cassisi S.Ripepi V.Leccia S.Molinaro R.,Musella I.2026-08-03T07:29:54Z2023-10-13T15:08:07ZCDS support team

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

cds-question@unistra.frvariable-starsastrometrystellar-agesinterstellar-reddeningmilky-way-galaxyvisible-astronomyUpdated evolutionary and pulsational model predictions are combined in order to interpret the properties of Galactic Classical Cepheids in the Gaia Data Release 2. In particular, the location of the instability strip boundaries and the analytical relations connecting pulsation periods to the intrinsic stellar parameters are combined with evolutionary tracks to derive reliable and accurate period-age and the first theoretical period-age-colour relations in the Gaia bands for a solar chemical abundance pattern (Z=0.02, Y=0.28). The adopted theoretical framework takes into account possible variations in the mass-luminosity relation for the core helium-burning stage as due to changes in the core convective overshooting and/or mass-loss efficiency, as well as the impact on the instability strip boundaries due to different assumptions for superadiabatic convection efficiency. The inferred period-age and period-age-colour relations are applied to a selected sample of both fundamental and first overtone Gaia Cepheids, and individual ages for the various adopted theoretical scenarios are derived. The retrieved age distributions confirm that a variation in the efficiency of superadiabatic convection in the pulsational model computations has a negligible effect, whereas a brighter mass-luminosity relation, as produced by mild overshooting, rotation, or mass-loss, implies significantly older age predictions. Moreover, older Cepheids are found at larger Galactocentric distances, while first overtone Cepheids are found to be systematically older than the fundamental ones. The comparison with independent age distribution analysis in literature supports the predictive capability of current theoretical framework.2020MNRAS.496.5039Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/496/5039CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+A/625/A14 : Reclassification of Cepheids in the Gaia DR2 (Ripepi+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/496/5039https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/496/5039http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/496/5039https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/496/5039https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/496/5039http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/496/5039GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/496/5039/table6 (Individual ages for the F-mode GCC in our sample as obtained by using both the canonical PA and PAC relations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/496/5039/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/496/5039/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/496/5039/table6?GETtext/xml+votable180.050000true82.358873127.00089830.005555555555555556Cone search capability for table J/MNRAS/496/5039/table7 (Individual ages for the F-mode GCC in our sample as obtained by using both the non-canonical PA and PAC relations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/496/5039/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/496/5039/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/496/5039/table7?GETtext/xml+votable180.050000true82.3588727.000890.005555555555555556Cone search capability for table J/MNRAS/496/5039/table8 (Individual ages for the FO-mode GCC in our as obtained by using both the canonical PA and PAC relations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/496/5039/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/496/5039/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/496/5039/table8?GETtext/xml+votable180.050000true263.7473594-44.83488940.0055555555555555565/8258-8260 9332-9333 9482 6/1239 1290 1340 1348 1402 1411 1421 1426 1432 1441 1445 1453 1465 1467 1475 1624-1625 1794 1858 1861 1920 1935 1985 2525 2684 3000 3005 3022 3027 3031 3033 3045 3047 3049-3050 3052 3054-3055 3059-3060 3251-3252 3255 3261 3263 3274 3284-3285 3309 3317 3322 3329 3340 3342 3362 3459 3589-3590 3599-3601 3615-3616 3621 3627 3632 3635 3641 3645 3647 3650 3656-3657 3663 3665 3712 3721-3722 3728 3731 12846 12971 12987 13026 13253 13288 13309-13310 13931 13933 13963 13990 14009 14047 14075 14078 14171 14199 14205 14229 14238-14240 14246 14251 14253-14254 14260 14262 14265 14267 14271 14282-14283 14291 14295 14299 14301 14303 14314 14320-14321 14323-14324 14328 14363 14390 14404 14409 14424 14427 14430 14435-14436 14438 14445 14455 14457 14533 14601-14602 14625 14633-14634 14637 14640 14709 14718 14724 14736-14737 14770 15360 15366 15378-15379 15388 15392 15396 15424-15425 15452 15473 15597 15618 15632 15638 15649 15652 15660 15939 15959 20805 20807 20820 20822 20827 20833 20838 20849-20850 20852 20854 20862 20945 20950 20957 20977-20978 20983 21509 21511 21513-21514 21516 21542 21632 21648 21666 21671 21677 21679 21683 21686 21704 22020 22064 22078 22115-22116 22122 22149 22181 22221 22267-22268 22438 23387 23619 23660 23662 23762 23769 23808 23816 23846 23936 24002 24088 24138 24145-24146 24226 24339-24340 24372 24453 24458 24478 28808 28819 28893 28991 29032 29042 29081 29089 29095 29104 29110 29157 29160 29190 29253 29378 29468 29533 29764 29772 29775 29875 30108 30222-30223 30245 30307 30321-30322 30333 30525 30580 30609 30641 30646 30659 30692 31209 31584 32012 32066-32067 32070 32877 32889 32926 32941 32943 32952-32954 32957 32965 32971 32989 33001 33029 33056-33057 33060 33141 33158 33269 33283-33285 33289-33290 33310-33311 33325 33327 33329-33332 33338 33352 33386 33413 33419 33423-33424 33431 33445 33474 33801 33803-33804 33875 37032 37203 37205 37207 37213-37214 37222-37223 37225 37230 37235 37240 37243 37245-37247 37273 37315-37316 37319 37325-37326 37336 37338 37340 37345 37350 37357-37359 37363-37364 37385 37393 37408 37410 37435 37510 37520 37523 37543 37610 37648 37674 37701 37704 37706 37708 37713 37721 37723 37731 37734-37737 37739 37741-37742 37745 37752 37757 37783 37791 37809 37812 37815 37821 37829 37834 37856 37859 37864 37867 37870 37888 37897 37903-37904 37912 37914 37917-37918 37923 37926-37927 37936 37938-37939 37993 38020 38022-38024 38026 38029 38049 38403 38408 38417 38476 38627 39191 39196-39197 39220 39225 39228 39230-39232 39234 39244 39263-39264 39293 39314 39316-39317 39319 39321 39326 39348 39353 39357 39367 39372 39374 39378 39382 39390 39392 39394 39400 39405-39406 39410 39416-39417 39419 39697 39702 39704 39735 39743 39748-39750 39754-39755 39759 39766 39768 39771 39777 39779-39780 39782 39784-39785 39787 39790 39793-39794 39796 39824 39831 39837-39838 39845 39860 39862 39871-39873 39879-39880 39883-39886 39889 39891-39892 39894 39896 39898 39903 39905 39908 39913 39916 39920 39928 39930 39935 39977 40491 40494 40580 40608 40613 40634 41315 41375 41383 41385 41459 41461 41468 41556 41567-41568 41571 41576 41579 41583 41587 41589 41599 41605 41614 41616 41618-41619 41621-41622 41625-41626 41628 41631 41637 41643 41646 41649 41664 41666-41667 41673-41674 41697-41698 41721-41722 41748 41761-41762 41768 41774 41793-41794 41813 41833 41862 41949 42118 42123 42141 42151 42153 42155-42156 42171 42177 42185 42336 42352 42378 42477 42523 42587 42692 42819-42821 42824 42850 43012-43013 43022-43023 43028 43040-43041 43044 43056-43057 43060 43064 43318 45121 45317 45328 45332-45333 45389 45392 47627 47637 47717 477741.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/496/5039?format=asciiOpticaldefaultJ/MNRAS/496/5039/table6Individual ages for the F-mode GCC in our sample as obtained by using both the canonical PA and PAC relationsSimbadSimbad column added by the CDSmeta.ref.urlchare_E(BP-RP)Error on E (BP-RP)magstat.errorfloatr_E(BP-RP)[LOG] Reference for E (BP-RP) (1)meta.ref;pos.framechartPAAge estimated using the period-age (PA) relationMyrtime.agefloatAllDisplay dtaa for tables 6 and 7meta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source identifiermeta.id;meta.mainRAdegRight ascension (ICRS) at Ep=2015.5degpos.eq.raDEdegDeclination (ICRS) at Ep=2015.5degpos.eq.decPPulsation perioddtime.perioddoubleGmagGaia G band magnitudemagphot.mag;em.optfloatBPmagGaia BP band magnitudemagphot.mag;em.opt.BfloatRPmagGaia RP band magnitudemagphot.mag;em.opt.RfloatE(BP-RP)Reddeningmagphot.color.excessfloate_tPAError on tPAMyrstat.errorfloattPACAge estimated using the period-age-colour (PAC) relationMyrtime.agefloate_tPACError on tPACMyrstat.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/496/5039/table7Individual ages for the F-mode GCC in our sample as obtained by using both the non-canonical PA and PAC relationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAllDisplay dtaa for tables 6 and 7meta.ref.urlcharGaiaDR2Gaia DR2 source identifiermeta.id;meta.mainRA_ICRSRight ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainPPulsation perioddtime.perioddoubleGmagGaia G band magnitudemagphot.mag;em.optfloatBPmagGaia BP band magnitudemagphot.mag;em.opt.BfloatRPmagGaia RP band magnitudemagphot.mag;em.opt.RfloatE(BP-RP)Reddeningmagphot.color.excessfloate_E(BP-RP)Error on E (BP-RP)magstat.errorfloatr_E(BP-RP)[LOG] Reference for E (BP-RP) (1)meta.ref;pos.framechartPAAge estimated using the period-age (PA) relationMyrtime.agefloate_tPAError on tPAMyrstat.errorfloattPACAge estimated using the period-age-colour (PAC) relationMyrtime.agefloate_tPACError on tPACMyrstat.errorfloatJ/MNRAS/496/5039/table8Individual ages for the FO-mode GCC in our as obtained by using both the canonical PA and PAC relationsRPmagGaia RP band magnitudemagphot.mag;em.opt.RfloatE(BP-RP)Reddeningmagphot.color.excessfloate_E(BP-RP)Error on E (BP-RP)magstat.errorfloatr_E(BP-RP)[LOG] Reference for E (BP-RP) (1)meta.ref;pos.framechartPAAge estimated using the period-age (PA) relationMyrtime.agefloate_tPAError on tPAMyrstat.errorfloattPACAge estimated using the period-age-colour (PAC) relationMyrtime.agefloate_tPACError on tPACMyrstat.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.mainSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source identifiermeta.id;meta.mainRAdegRight ascension (ICRS) at Ep=2015.5degpos.eq.raDEdegDeclination (ICRS) at Ep=2015.5degpos.eq.decPPulsation perioddtime.perioddoubleGmagGaia G band magnitudemagphot.mag;em.optfloatBPmagGaia BP band magnitudemagphot.mag;em.opt.Bfloat