J/MNRAS/481/1195ivo://CDS.VizieR/J/MNRAS/481/1195doi:10.26093/cds/vizier.74811195CDSMuraveva T.Delgado H.E.Clementini G.Sarro L.M.Garofalo A.2024-08-18T20:21:42Z2022-07-04T13:37:33ZCDS support team

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

cds-question@unistra.frvisible-astronomytrigonometric-parallaxvariable-starsmagellanic-cloudsWe present results from the analysis of 401 RR Lyrae stars (RRLs) belonging to the field of the Milky Way (MW). For a fraction of them multiband (V, Ks, W1) photometry, metal abundances, extinction values, and pulsation periods are available in the literature and accurate trigonometric parallaxes measured by the Gaia mission alongside Gaia G-band time-series photometry have become available with the Gaia Data Release 2 (DR2) on 2018 April 25. Using a Bayesian fitting approach, we derive new near-, mid-infrared period-absolute magnitude-metallicity (PMZ) relations and new absolute magnitude-metallicity relations in the visual (M_V_-[Fe/H]) and G bands (M_G_-[Fe/H]), based on the Gaia DR2 parallaxes. We find the dependence of luminosity on metallicity to be higher than usually found in the literature, irrespective of the passband considered. Running the adopted Bayesian model on a simulated data set we show that the high-metallicity dependence is not caused by the method, but likely arises from the actual distribution of the data and the presence of a zero-point offset in the Gaia parallaxes. We infer a zero-point offset of -0.057 mas, with the Gaia DR2 parallaxes being systematically smaller. We find the RR Lyrae absolute magnitude in the V, G, Ks, and W1 bands at metallicity of [Fe/H]=-1.5dex and period of P=0.5238d, based on Gaia DR2 parallaxes to be M_V_=0.66+/-0.06mag, M_G_=0.63+/-0.08mag, M_Ks_=-0.37+/-0.11mag, and M_W1_=-0.41+/-0.11mag, respectively.2018MNRAS.481.1195Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/481/1195CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/MNRAS/435/3206 : Catalog of parameters of Galactic RR Lyrae variableshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/481/1195https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/481/1195http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/481/1195https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/481/1195https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/481/1195http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/481/1195GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/481/1195/table1 (Data set for the 401 RRLs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/481/1195/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/481/1195/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/481/1195/table1?GETtext/xml+votable180.050000true333.856936.822620.0055555555555555566/110 572 1294 1663 2058 2089 2173 2238 2254 2484 2629 3049 3176 4037 4152 4165 4219 4286 4338 4479 4762 4833 4942 5182 5439 5543 5708 6301 6386 6390-6391 6430 6469 6530 6537 6551 6556 6560-6561 6567 6577 6740 6744 7174 7518 7847 8064 8294 8466 8512 8612 8614 8773 8896 8994 9027 9095 9138 9172 9363 9429 9438 9509 9635 9769 9938 10169 10328 10334 10362 10382 10395 10401 10403 10406 10411 10415 10524 10541 10569 10584 10602 10638 10661 10778 10792 10797 10802 10862 10898 10985 11098 11123 11492 11961 12463 12512 12536 12632 12696 12743 12773 12918 13066 13171 13205 13588 13647 13680 13905 14373 14504 14857 14874 14918 14939 14994 14996 15043 15106 15120 15220 15281 15714 16018 16022 16126-16127 16308 16342 16553 16602 16849 16867 16923 17158 17328 17745 18080 18177 18502 18536 18578 18633 18964 19104 19110 19169 19333 19449 19956 20020 20097 20267 20275 20303 20328 20330 20332 20377 20418 20497 20541 20998 21127 21146 21182 21533 21878 21961 22111 22338 22571 22842 23271 24772 24866 25199 25491 25611 25768 25799 25803 25807 25866 25953 26065 26079 26131 26170 26281 26288 26413 26487 26515 26733 26756 26894 26981 27012 27125 27333 27361 27474 27543 27554 27583 27824 27833 27915 27983 27998 28030 28143 28155-28156 28222 28227 28256 28383 28469 28519 28524-28525 28538 28582 28611 28674 28701 28813 29009 30019 30055 30868 30923 30957 31054 31335 31390 31415 31648 31743 31787 31866 31884 32254 32257 32282 32354 32436 32636 32663 32822 32833 32856 32994 33051 33117 33121 33127 33197 33342 33432 33465 33467 33553 33745 33766 33996 34229 34236 34240 34537 34558 34944 35151 35418 35423 35611 35686 35724 35768 35852 35921 36048 36363 36605 36704 36781 36939 37095 37544 37911 37952 38087 38233 38304 38809 38942 39152 39475 40553 40651 40722 40767-40768 40806 40882 40911 40962 40988 40998 41022 41064 41081 41174 41191 41200 41217 41219 41227 41231 41248 41260 41283 41285 41318 41510 41991 42053 42260 42672 43405 43491 43558 43794 43888 43977 44242 44312 44326 44498 44559 44640 44914 44991 45062 45086 45152 45164 45241 45324 45337 45676 45741 45765 45796 45963 45992 46059 46069 46130 46204 46246 46327 46373 46632 46641 46650 46755-46756 46824 47273 47327 47342 47435 47467-47468 47527 47618 47674 47776 47821 47856 47959 48113 48131 48137 48228 48290 48459 48911 48916 49086 491027.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/481/1195?format=asciiOpticaldefaultJ/MNRAS/481/1195/table1Data set for the 401 RRLsTypeRRL typesrc.classcharf_P[a] Flag on P (1)meta.codecharNameStar Namemeta.id;meta.maincharAvmagExtinction in the V bandmagphys.absorptionfloat_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.decnullableindexedSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source IDmeta.idRA_ICRSRight Ascension (ICRS) at Ep=2015.5 from Gaia DR2degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2015.5 from Gaia DR2degpos.eq.dec;meta.mainplxParallax from GAIA DR2maspos.parallax.trigfloate_plxError on plxmasstat.error;pos.parallaxfloatf_Type[a] Flag on Type (1)meta.codecharPPerioddtime.periodfloatVmag? Mean V magnitude (2)magphot.mag;em.opt.Vfloatnullablee_Vmag? Error on Vmagmagstat.error;phot.magfloatnullableKsmagMean Ks magnitude (2)magphot.mag;em.IR.Kfloate_KsmagError on Ksmagmagstat.error;phot.magfloatf_Ksmag[b] Flag on Ksmag (3)meta.codecharW1mag? Mean W1 magnitude (2)magphot.mag;em.IR.3-4umfloatnullablee_W1mag? Error on W1mag (4)magstat.error;phot.magfloatnullableGmag? Mean G magnitudemagphot.mag;em.opt.Vdoublenullablee_Gmag? Error on Gmagmagstat.error;phot.magdoublenullable[Fe/H]? Metallicity on the Zinn & West (1984ApJS...55...45Z) metallicity scalephys.abund.Zfloatnullablee_[Fe/H]? Error on [Fe/H]stat.error;phys.abund.Fefloatnullablef_Avmag? Flag on Avmag (1)meta.codechar