J/A+A/700/A74ivo://CDS.VizieR/J/A+A/700/A74doi:10.26093/cds/vizier.37000074CDSOmkumar O.A.Cioni L.M.-R.Subramanian S.de Bruijne J.Nair A.Dias B.2025-08-27T20:01:25Z2025-08-06T12:19:10ZCDS support team

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

cds-question@unistra.frmagellanic-cloudssupergiant-starsvisible-astronomymedium-band-photometrymetallicitystellar-distanceOne key to understanding a galaxy's evolution is studying the consequences of its past dynamical interactions that have influenced its shape. By measuring the metallicity distribution of stellar populations with different ages, one can learn about these interactions. The Magellanic Clouds, being the nearest pair of interacting dwarf galaxies with a morphology characterised by different tidal and kinematic sub-structures as well as a vast range of stellar populations, represent an excellent place to study the consequences of dwarf-dwarf galaxy interactions and the interactions with their large host, the Milky Way. We aim to determine the metallicities ([Fe/H]) of red giant branch (old) and supergiant (young) stars covering the entire galaxies, estimate their radial metallicity gradients, and produce homogeneous metallicity maps. We used the XP spectra from Gaia Data Release 3 to calculate synthetic Stroemgren magnitudes from the application of the GaiaXPy tool and adopted calibration relations from the literature to estimate the photometric metallicities. Results. We present photometric metallicity maps for ~90000 young stars and ~270000 old stars within ~11{deg} of the Small Magellanic Cloud and ~20{deg} of the Large Magellanic Cloud from a homogeneous dataset. We find that the overall radial metallicity gradients decrease linearly, in agreement with previous studies. Thanks to the large stellar samples, we could apply piecewise-regression fitting to derive the gradients within different radial regions. The catalogues containing the estimated photometric metallicities from this work are made available at the CDS. The overall metallicity gradients, traced by young and old stars, decrease from the centre to the outskirts of both galaxies. However, they show multiple breakpoints, depicting regions following different and sometimes opposite trends. These are associated with the structure of the galaxies and their history of star formation and chemical evolution but may be influenced by a low number of sources, especially at the centre (due to crowding) and in the outermost regions.2025A&A...700A..74Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/700/A74CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/700/A74https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/700/A74http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/700/A74https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/700/A74https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/700/A74http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/700/A74GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/700/A74/lmc-rgb (Photometric metallicities for LMC RGB stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/700/A74/lmc-rgb?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/700/A74/lmc-rgb?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/700/A74/lmc-rgb?GETtext/xml+votable180.050000true63.92436190634-69.737181802810.005555555555555556Cone search capability for table J/A+A/700/A74/lmc-sgb (Photometric metallicities for LMC supergiant stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/700/A74/lmc-sgb?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/700/A74/lmc-sgb?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/700/A74/lmc-sgb?GETtext/xml+votable180.050000true64.12937241205-69.421866514270.005555555555555556Cone search capability for table J/A+A/700/A74/smc-rgb (Photometric metallicities for SMC RGB stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/700/A74/smc-rgb?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/700/A74/smc-rgb?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/700/A74/smc-rgb?GETtext/xml+votable180.050000true4.84959124275-73.4049600970.005555555555555556Cone search capability for table J/A+A/700/A74/smc-sgb (Photometric metallicities for SMC supergiant stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/700/A74/smc-sgb?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/700/A74/smc-sgb?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/700/A74/smc-sgb?GETtext/xml+votable180.050000true4.95234887209-73.588550529890.0055555555555555563/513 516-518 520 528 586 608 4/2049 2051 2057-2062 2076-2077 2084 2088-2090 2116-2118 2120 2312 2314 2336 2338 2350 2436 2440-2442 5/8193 8201 8203 8225-8227 8253 8312-8313 8315 8317 8342 8344 8346-8347 8364 8366 8385 8388 8401-8402 8476-8478 8484-8485 8487-8488 8490 8492 8496-8497 8512-8513 8704 9262 9272 9348 9350-9351 9356 9358-9359 9361-9363 9368 9370 9392 9396 9406 9754 9772 9856-9858 11281 11285-11286 11329 11331-11334 11336 11344-11345 11347-11348 11520 6/32769-32771 32777 32781 32783 32801 32803 32811 32896-32897 32899 33008-33010 33016-33018 33020 33022-33023 33256-33258 33264-33265 33267 33272-33273 33275 33277-33279 33360 33362-33365 33367 33372-33373 33380-33381 33383 33392 33395-33398 33400-33401 33460-33461 33463 33468 33470 33472-33474 33476 33478 33480-33482 33484 33504 33536 33538-33539 33545 33547-33550 33556 33558-33560 33562-33563 33565-33566 33568 33570 33574 33577 33586-33587 33589-33590 33600 33602 33612 33615-33618 33623-33624 33626 33628 33636 33916-33918 33945-33947 33956-33957 33959 33964 33972 33974 33976 33993 34000 34016 34056-34058 34060-34062 34064-34066 34080-34082 34305 34820 34822 34824-34825 34828 36866 36872 36874-36875 36878 36894 36896-36898 36900 36904 36906-36909 36911-36912 36914-36915 36917 36920-36922 36926 36971 36975 37008-37009 37011 37014-37016 37019 37021-37022 37040 37042-37044 37046-37047 37052 37054-37056 37058-37059 37066 37081 37094 37096-37097 37100 37102 37105 37113 37116 37118-37119 37396 37398-37399 37428-37430 37442 37456-37458 37464 37466-37468 37471 37478-37479 37484 37487-37488 37490 37492-37493 37496 37498 37502 37574-37575 37577-37580 37582-37583 37588 37590 37592-37594 37596 37616 37618-37620 37666 38992-38993 39008-39009 39011-39012 39014 39092 39094 39096-39098 39104 39106 39112 39436 39440 39456-39457 45120-45122 45132 45135-45138 45148-45149 45157 45159 45169 45171 45173 45175 45180 45312-45313 45315 45323 45340 45348-45350 45352 45361-45362 45364 45384-45386 45396 45398 45400 45403 45405 45409-45410 46084-46085https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/700/A74?format=asciiOpticaldefaultJ/A+A/700/A74/lmc-rgbPhotometric metallicities for LMC RGB starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Unique source ID from Gaia DR3meta.id;meta.mainRA_ICRSRight Ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainindexedDE_ICRSDeclination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainindexedvmagStandardised Stroemgren magnitude in v bandmagphot.mag;em.opt.BfloatbmagStandardised Stroemgren magnitude in b bandmagphot.mag;em.opt.BfloatymagStandardised Stroemgren magnitude in y bandmagphot.mag;em.opt.VfloatDist-degRadius from the centre of the LMC in degreesdegphys.angSizedoubleDist-kpcRadius from the centre of the LMC in kpckpcpos.distancedoubleE(B-V)Reddening values (1)magphot.color.excessdoubleAVExtinction in v bandmagphys.absorptiondouble[Fe/H]Recalibrated photometric metallicityphys.abund.Zdoublee_[Fe/H]Recalibrated photometric metallicity uncertainty ([Fe/H]_err)stat.error;phys.abund.FedoubleJ/A+A/700/A74/lmc-sgbPhotometric metallicities for LMC supergiant starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Unique source ID from Gaia DR3meta.id;meta.mainRA_ICRSRight Ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainindexedDE_ICRSDeclination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainindexedvmagStandardised Stroemgren magnitude in v bandmagphot.mag;em.opt.BfloatbmagStandardised Stroemgren magnitude in b bandmagphot.mag;em.opt.BfloatymagStandardised Stroemgren magnitude in y bandmagphot.mag;em.opt.VfloatDist-degRadius from the centre of the LMC in degreesdegphys.angSizedoubleDist-kpcRadius from the centre of the LMC in kpckpcpos.distancedoubleE(B-V)Reddening values (1)magphot.color.excessdoubleAVExtinction in v bandmagphys.absorptiondouble[Fe/H]Recalibrated photometric metallicityphys.abund.Zdoublee_[Fe/H]Recalibrated photometric metallicity uncertainty ([Fe/H]_err)stat.error;phys.abund.FedoubleJ/A+A/700/A74/smc-rgbPhotometric metallicities for SMC RGB starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Unique source ID from Gaia DR3meta.id;meta.mainRA_ICRSRight Ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainindexedDE_ICRSDeclination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainindexedvmagStandardised Stroemgren magnitude in v bandmagphot.mag;em.opt.BfloatbmagStandardised Stroemgren magnitude in b bandmagphot.mag;em.opt.BfloatymagStandardised Stroemgren magnitude in y bandmagphot.mag;em.opt.VfloatDist-degRadius from the centre of the LMC in degreesdegphys.angSizedoubleDist-kpcRadius from the centre of the LMC in kpckpcpos.distancedoubleE(B-V)Reddening values (1)magphot.color.excessdoubleAVExtinction in v bandmagphys.absorptiondouble[Fe/H]Recalibrated photometric metallicityphys.abund.Zdoublee_[Fe/H]Recalibrated photometric metallicity uncertainty ([Fe/H]_err)stat.error;phys.abund.FedoubleJ/A+A/700/A74/smc-sgbPhotometric metallicities for SMC supergiant starsbmagStandardised Stroemgren magnitude in b bandmagphot.mag;em.opt.BfloatymagStandardised Stroemgren magnitude in y bandmagphot.mag;em.opt.VfloatDist-degRadius from the centre of the LMC in degreesdegphys.angSizedoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Unique source ID from Gaia DR3meta.id;meta.mainRA_ICRSRight Ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainindexedDE_ICRSDeclination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainindexedvmagStandardised Stroemgren magnitude in v bandmagphot.mag;em.opt.BfloatDist-kpcRadius from the centre of the LMC in kpckpcpos.distancedoubleE(B-V)Reddening values (1)magphot.color.excessdoubleAVExtinction in v bandmagphys.absorptiondouble[Fe/H]Recalibrated photometric metallicityphys.abund.Zdoublee_[Fe/H]Recalibrated photometric metallicity uncertainty ([Fe/H]_err)stat.error;phys.abund.Fedouble