J/A+A/625/A14ivo://CDS.VizieR/J/A+A/625/A14doi:10.26093/cds/vizier.36250014CDSRipepi V.Molinaro R.Musella I.Marconi M.Leccia S.Eyer L.2020-02-21T09:02:02Z2019-04-30T08:13:06ZCDS support team

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

cds-question@unistra.frvariable-starsvisible-astronomytrigonometric-parallaxphotometryClassical Cepheids are the most important primary indicators for the extragalactic distance scale. Establishing the precise zero points of their Period-Luminosity and Period-Wesenheit (PL/PW) relations has profound consequences on the estimate of H_0_. Type II Cepheids are also important distance indicator and tracers of old stellar populations. The recent Data Release 2 (DR2) of the Gaia Spacecraft includes photometry and parallaxes for thousands of classical and type II cepheids. We aim at reviewing the classification of Gaia DR2 Cepheids and to derive precise PL/PW for Magellanic Cloud (MCs) and Galactic Cepheids. Information from the literature and the Gaia astrometry and photometry are adopted to assign DR2 Galactic Cepheids to the classes: Classical, Anomalous and Type II Cepheids. We re-classify the DR2 Galactic Cepheids and derive new precise PL/PW relations in the Gaia passbands for the MCs and Milky Way Cepheids. We investigated for the first time the dependence on metallicity of the PW relation for Classical Cepheids in the Gaia} bands, finding non-conclusive results. According to our analysis, the zero point of the Gaia DR2 parallaxes as estimated from Classical and Type II Cepheids seems to be likely underestimated by ~0.07mas, in full agreement with recent literature. The next Gaia data releases are expected to fix this zero point offset to eventually allow a determination of H_0_ to less than 1%.2019A&A...625A..14Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/625/A14CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/625/A14https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/625/A14http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/625/A14https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/625/A14https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/625/A14http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/625/A14GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/625/A14/table2 (Comparison with literature classification)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/625/A14/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/625/A14/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/625/A14/table2?GETtext/xml+votable180.050000true158.01837-61.782620.005555555555555556Cone search capability for table J/A+A/625/A14/table5 (Reclassification of the Cepheids in Gaia DR2)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/625/A14/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/625/A14/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/625/A14/table5?GETtext/xml+votable180.050000true101.64608-14.924560.0055555555555555565/8258-8260 9332-9334 9482 9829 9937 9971 6/321 336 435 497 706 1031 1114 1226 1239 1255 1287 1290 1297 1305 1339-1341 1343 1348 1402 1411 1421 1426 1432 1441 1445 1453 1465 1467 1475 1480 1624-1625 1661 1668 1682 1718 1794 1805 1848 1858 1861 1920 1929 1935 1941 1985 2379 2399 2465 2473 2519 2525 2562 2566 2684 2716 2799 2805 2908 2914 2924 2982 2989 2993 2997 3000 3005 3008 3022 3026-3027 3030-3031 3033 3045 3047 3049-3050 3052 3054-3056 3059-3060 3067 3131 3220 3241 3251-3252 3255 3257 3261 3263 3274 3284-3285 3309 3317 3322 3329 3333 3340 3342 3361-3362 3364 3422 3440 3459 3464 3472 3589-3590 3599-3601 3615-3616 3621 3627 3632 3635 3641 3645 3647 3650 3656-3657 3663 3665 3712 3721-3722 3728 3731 3781 3863 3958 4137 4150 4329 4392 4510 4563 4650 4738 4743 4799 4813 4865 5331 5752 5828 6132 6220 6437 6479 6546 6796 7065 7135 7150 7200 7222 7241 7353 7682 8168 8171 8181 8278 8286 8321 8452 8468 8584 8870 8994 9031 9135 9261 9281 9395 9436 9489 9491 9494 9643 9666 9676 9729 9765 9812 9950 10007-10008 10062 10089 10117 10126 10183 10323 10336-10337 10345 10742 10800 11327-11328 11691 11852 11957 12033 12321-12322 12338 12405 12412 12418 12436 12627 12685 12708 12711 12715 12724 12759 12838-12839 12845-12846 12852 12856 12872 12904 12908 12910 12925-12926 12934 12939 12955 12957 12964-12965 12967 12971 12976 12982 12984 12987 12993 12997 13006 13019 13026 13098 13103-13104 13115 13137 13148 13164 13166-13167 13175 13201 13203 13215 13248 13253 13255-13257 13261 13267 13274-13275 13280 13282 13288 13305 13309-13310 13442 13460 13565 13575 13814 13846 13875 13931 13933 13955 13959 13961-13963 13965 13974 13986 13990 14007 14009 14047 14049 14063 14075 14078 14171 14191 14199 14205 14213-14214 14218 14227 14229 14238-14240 14246 14251 14253-14254 14259-14260 14262 14265 14267 14271 14275 14282-14283 14291 14295 14299 14301-14303 14314 14320-14321 14323-14324 14328 14363 14366 14377 14390 14401 14404 14409 14424 14427 14430 14434-14436 14438 14442 14445-14446 14455 14457 14462 14468 14470 14480 14489-14490 14508 14533 14536 14553 14562 14601-14602 14622 14625 14633-14634 14637 14639-14640 14645 14651 14687 14709 14714 14718 14720-14721 14724-14725 14736-14737 14758 14761 14768 14770 14773-14774 14865 14882 14902 14929 14936 14964 15021 15043 15132 15138 15187 15192 15237 15288 15360 15366 15378-15379 15388 15392-15393 15396 15424-15425 15452 15473-15474 15478 15502 15592 15597-15598 15618 15632 15638 15649 15652 15660 15846 15858 15890 15895 15939 15959 16027 16246 16818 16836 16907 17071 17112 17119 17202 17215 17424 17474 17544 18013 18225 18263 18279 18367 18571 18748 18761 18769 18819 19033 19078 19103 19257 19580 19720 19784 19958 20171 20196 20249 20274 20348 20411 20577 20602 20644 20750 20782 20805 20807 20820 20822 20827 20833 20838 20840 20849-20850 20852 20854 20861-20862 20923 20932 20943 20945 20950 20957 20964 20967 20977-20978 20983 21016-21017 21065 21117 21146 21267 21326 21336 21353 21439 21442 21457 21480 21504 21509 21511 21513-21514 21516 21526 21542 21564 21574 21576 21617 21632 21641 21644 21648 21666 21671 21677 21679 21683 21686 21704 21708 21746 21768 21800 21802 21835 21918 21941 22020 22022 22039 22052 22064 22078 22115-22116 22120 22122-22123 22149 22181 22193 22221 22231 22267-22268 22280 22296 22367 22438 22450 22626 22736 22840 23048 23300 23332 23346 23387 23465 23560 23619 23660 23662 23739 23762 23769 23774 23808 23816 23846 23936 24002 24088 24108 24138 24145-24146 24156 24226 24291 24296 24339-24340 24372 24453 24458 24478 24527 24572 24623 24632 24712 24763 24808 24813 24897 24917 24957 25165 25309 25501 25646 25709 25833 25842 25883 25932 25991 26028 26045 26090 26193 26256 26283 26319 26361 26539 26688 26867 26912 26994 27007 27216 27219 27583 27859 27983 28120 28191 28675 28677 28682-28683 28686 28689 28691-28693 28696 28710 28716 28720 28722 28724-28726 28733 28737 28741 28743 28745 28757 28763 28766 28770 28772 28788 28791 28797 28808 28819 28821 28823 28831 28833 28838 28864-28865 28887 28890 28893 28907 28910-28911 28916 28918 28930 28938 28943 28958 28961 28963 28972 28974 28991 29020 29032 29040 29042 29044 29046 29057-29058 29081 29089 29095 29104 29109-29110 29118 29136 29141 29148 29157 29159-29160 29181 29190 29194-29196 29199 29203 29211 29216-29217 29219-29221 29223 29227-29229 29234 29238 29248 29253 29257 29260-29262 29273 29288-29289 29307 29311 29318 29320 29324 29340 29378 29394 29426 29448 29468 29476 29482-29483 29519 29533 29569 29572 29574 29577 29609 29665 29689 29758 29764 29769 29772 29775 29873 29875 29955 29968 29998 30000 30039 30042 30044 30086 30093 30108 30155 30174 30184 30194 30222-30223 30225 30239 30245 30277 30292 30307 30321-30322 30333 30443 30446 30448 30471 30492 30495 30517 30524-30525 30527 30553 30560 30577 30580 30583-30584 30588 30596 30609 30631 30639 30641 30646 30657 30659 30661 30672 30677 30685 30692 30705 30716 30727 30743 30773 30775 30793 30880 30894 30927 30941 30966 31011 31015 31019 31043 31115 31125 31130 31165 31192 31209 31212 31221 31239 31277 31416-31417 31462 31513 31532 31559 31578 31584 31700 31744 31788 31805 31820 31840 31873 31896 31936 31951 31956 31968 31979 32000 32012 32015 32021 32047 32052 32066-32067 32070 32074 32090 32097 32100 32105 32124 32133 32138 32193 32221 32227 32236-32237 32246 32276 32326 32347 32398 32427 32432 32452 32530 32606-32608 32611-32612 32647-32648 32727 32733 32739 32741 32790 32857 32877 32881 32884 32889 32919 32926 32937 32941 32943-32944 32952-32954 32957 32965 32971 32989 33001 33029 33044 33056-33057 33060 33067 33141 33158 33224 33269 33283-33285 33289-33290 33310-33312 33325 33327 33329-33333 33337-33338 33352 33382 33384 33386 33413 33418-33419 33423-33424 33431-33432 33445-33446 33453-33454 33466 33474 33484 33503 33705 33801-33804 33869 33875 33990 34608 34722 34761 34863 34866 34880 35182 35387 35543 35549 35611 35720 35954 35969 36814 36921 37007 37020 37032 37034 37059 37086 37116 37151 37163 37168 37183 37203 37205 37207-37208 37211 37213-37214 37221-37223 37225 37230-37231 37234-37235 37240 37243 37245-37247 37251 37253 37260 37273 37278 37289 37294 37302 37315-37317 37319-37320 37325-37327 37340 37344-37345 37347 37350 37353 37357-37359 37363-37364 37385 37393 37408 37410 37416 37435 37473 37487 37510 37516 37519-37520 37523 37543 37610 37614 37633 37637-37638 37648 37674 37697 37701 37704 37706 37708 37713 37716 37721 37723 37731 37734-37737 37739 37741-37742 37745 37747 37752 37757 37766 37776 37783 37787 37791 37809 37812 37815 37821 37829 37834 37840 37856 37859 37864 37867 37870-37871 37888 37895-37897 37903-37904 37912 37914 37916-37918 37923 37926-37927 37932 37936 37938-37939 37942-37943 37957 37966 37974 37978 37982 37990 37992-37993 38012 38020 38022-38024 38026 38029 38036 38049 38077 38079 38089 38155 38174 38186 38200 38241 38317 38327 38344 38366 38392 38399 38403 38408 38417 38419 38450 38464 38476 38541 38556 38592 38596 38605 38607 38627-38628 38652 38675 38690 38701 38722 38784 39097 39125 39158 39174 39191 39195-39197 39216-39217 39220 39225 39228 39230-39232 39234 39244 39263-39264 39293 39301 39307 39312 39314 39321 39326 39331 39348 39353 39357 39367 39372 39374 39378 39382 39387 39390 39392 39394-39395 39400 39405-39406 39410-39411 39416-39417 39419 39422 39464 39545 39596 39629 39655 39674 39682 39697 39702-39704 39725 39735 39743 39754-39755 39759 39766 39768 39771 39777 39779-39782 39784-39785 39787-39788 39790 39793-39794 39796 39805 39824 39831 39837-39838 39845 39860 39862 39867 39871-39873 39879-39880 39883 39888-39889 39891-39892 39894 39896 39898 39903 39905 39908 39913 39916 39920-39921 39928 39930 39933-39935 39977 39979 39991 39993 40003 40013 40052 40071 40099 40112 40124 40133 40159 40167 40181 40352 40485 40491 40493-40495 40500 40507 40566 40573 40578 40580 40605 40608 40613 40620 40627 40634 40642 40670 40909 41050 41102 41109 41118 41130 41132 41149 41166 41239-41240 41245 41271 41276 41289 41311 41313 41315 41324 41347 41366 41373 41375 41383 41385 41391 41394 41399 41402 41409 41418-41419 41426 41434 41446 41455 41459 41461 41468 41474 41494 41496 41524 41529 41535-41536 41549 41556 41567-41568 41571 41576 41579 41583-41584 41586-41587 41589 41599 41603 41605 41607-41608 41612 41614 41616 41618-41622 41625-41628 41631 41636-41637 41643 41646 41649 41651 41664 41666-41667 41673-41674 41676 41678 41688 41697-41698 41721-41722 41724 41726 41736-41737 41748 41753 41761-41762 41768 41774 41792-41794 41796 41809 41813 41821 41831 41833 41837 41845 41861-41862 41876 41892 41894 41897 41904 41907 41927 41949 41975-41976 41978 42006 42008 42011 42015 42022 42029 42036 42041 42046 42050 42084 42090 42092 42116 42118 42123 42130 42134 42137 42141 42151 42153 42155-42156 42163 42171 42177 42185-42186 42193 42213 42244 42249 42264 42277-42278 42290 42310 42317 42321-42324 42327 42331 42333 42336 42343 42352 42361 42378 42387 42407 42412 42415 42430 42464 42472 42476-42477 42479 42485-42486 42490 42523 42544-42545 42559 42568 42587-42588 42594 42599 42602 42632 42637-42638 42645 42648 42658 42674 42678-42679 42687 42691-42692 42694 42742 42765 42780 42795 42819-42821 42824 42829 42832 42841 42843-42844 42850 42855 42869 42877 42879 42890 42898 42907 42925 42940 42965 42990 43009 43012-43013 43022-43023 43028 43040-43041 43044 43047-43048 43056-43057 43060 43064-43065 43070-43071 43098 43136 43149 43153 43167 43188 43257 43284 43317-43318 43320 43334 43351 43375 43383 43418 43468 43518 43560 43583 43656 43682 43724 43753 43762 43788 43860 44042 44072 44080 44089 44120 44122 44151 44176 44181 44232 44276 44290 44318 44369 44406 44438 44444 44545 44560 44666 44688 44785 44840 44891 44936 45065 45084 45121 45167 45195 45276 45280 45291 45317 45328 45332-45333 45335 45386 45389-45390 45392 45416 45438 45457 45511 45521 45578 45672 45674 45694 45720 45770 45778 45800 45870 45882 46059 46073 46176 46182 46194 46292 46302 46306 46390 46445 46725 46753 46757 46901 47107 47118-47119 47123 47127 47138-47139 47156 47164-47165 47168 47191 47231 47234 47261 47268 47272 47281 47285 47350 47360 47365 47460 47488 47498 47506 47512 47594 47627 47637 47639 47644 47650 47653 47655 47658 47660 47676 47681 47717 47747 47763 47774 47780 47783 47788 47824 47833 47842-47843 47850 47853 47855 47870 47914-47916 47922 47927 47942 47947 47961 47998 48003 48025 48035-48036 48038 48040 48042 48048 48066 48108 48219 48252 48355 48576 48665 48681-48682 48705 48718 48720 48732 48753 48798 48810 48819 48859 48882-48883 48922 48933 48971 49011 49026 49048 49058 49092https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/625/A14?format=asciiOpticaldefaultJ/A+A/625/A14/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.notecharBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notecharJ/A+A/625/A14/table2Comparison with literature classificationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintT78in table 7 and/or 8meta.ref.urlcharSourceIdGaia DR2 source identificationmeta.id;meta.mainprimaryRA_ICRSRight ascension (ICRS) at epoch 2015.5degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at epoch 2015.5degpos.eq.dec;meta.mainDR2ClassVariability classification according to Gaia DR2meta.code.class;src.varcharLitNameName of the object in the literaturemeta.idcharLitClassType(s) of variability found in the literaturemeta.notechare_LitClassSource for the different type of variability, inrefs.dat file (1)stat.errorcharP1? Period present in the literaturedtime.perioddoublenullableP2? Period present in the literaturedtime.perioddoublenullableP3? Period present in the literaturedtime.perioddoublenullabler_P1Source of the period P1, inrefs.dat file (1)meta.ref;pos.framecharr_P2Source of the period P2, inrefs.dat file (1)meta.ref;pos.framecharr_P3Source of the period P3, inrefs.dat file (1)meta.ref;pos.framechar_RA.icrsRight ascension (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedJ/A+A/625/A14/table5Reclassification of the Cepheids in Gaia DR2PerPerioddtime.perioddoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceIdGaia DR2 source identificationmeta.id;meta.mainRA_ICRSRight ascension (ICRS) at epoch 2015.5degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at epoch 2015.5degpos.eq.dec;meta.maino_GmagNumber of epochs in Gmeta.numberinto_GBPmagNumber of epochs in GBPmeta.numberinto_GRPmagNumber of epochs in GRPmeta.numberintGmagIntensity averaged magnitudes in Gmagphot.mag;em.optfloatGBPmagIntensity averaged magnitudes in GBPmagphot.mag;em.opt.BfloatGRPmagIntensity averaged magnitudes in GRPmagphot.mag;em.opt.RfloatR21? Fourier amplitude ratio R21src.var.amplitude;arith.ratiofloatnullableR31? Fourier amplitude ratio R31src.var.amplitude;arith.ratiofloatnullablePhi21? Fourier phase difference Phi21radstat.Fourier;arith.difffloatnullablePhi31? Fourier phase difference Phi31radstat.Fourier;arith.difffloatnullablePlxParallaxmaspos.parallaxfloate_PlxError on parallaxmasstat.error;pos.parallaxfloatE(BP/RP)Excess of flux in the BP and RP integrated photometry with respect to the G bandphot.flux;arith.ratiofloatepsiExcess noise of the sourcemasstat.fit.paramfloatSigniepsiSignificance of epsistat.fit.goodnessdoubleRUWERenormalised unit weight errormasphys.atmol.weightfloatClassVariability classification from from present workmeta.code;src.varcharNew[N] Flag "N" to denote a cepheid not known in the literaturemeta.codecharNotesNotes (1)meta.notechar_RA.icrsRight ascension (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedJ/A+A/625/A14/table7Association of the Cepheids in Gaia DR2 with star clusters or galaxies of the Local GrouprecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceIdGaia DR2 source identificationmeta.id;meta.mainLitNameName of the object in the literaturemeta.idcharClassVariability classification according to this workmeta.code;src.varcharHostSystemHost systemmeta.id.parentcharr_HostSystemSource of the association of the variable with the stellar system, in refs.dat filemeta.ref;pos.framecharJ/A+A/625/A14/table8Values of reddening and metallicity for Classical Cepheids adopted in this work (and relative references)e_E(B-V)Error on E(B-V)magstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameLiterature namemeta.id;meta.maincharClassVariability classification according to this workmeta.code;src.varcharSourceIdGaia DR2 source identificationmeta.idE(B-V)Color excess due to extinctionmagphot.color.excessfloat[Fe/H]? Metallicityphys.abund.Zfloatnullabler_E(B-V)[1/4] Source for E(B-V) value (1)meta.ref;pos.frameintr_[Fe/H][2/5]? Source for [Fe/H] value (1)meta.refintnullable