J/ApJ/715/277ivo://CDS.VizieR/J/ApJ/715/277doi:10.26093/cds/vizier.17150277CDSBono G.Caputo F.Marconi M.Musella I.2018-01-08T06:38:13Z2012-05-30T12:31:55ZCDS support team

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

cds-question@unistra.frgalaxieschemical-abundancesvariable-starsstellar-distanceWe present a detailed investigation of the Cepheid distance scale by using both theory and observations. Through the use of pulsation models for fundamental mode Cepheids, we found that the slope of the period-luminosity (P-L) relation covering the entire period range (0.40<=logP<=2.0) becomes steeper when moving from optical to near-infrared (NIR) bands, and that the metallicity dependence of the slope decreases from the B- to the K band. The sign of the metallicity dependence for the slopes of the P-LV and P-LI relation is at odds with some recent empirical estimates. We determined new homogeneous estimates of V- and I-band slopes for 87 independent Cepheid data sets belonging to 48 external galaxies with nebular oxygen abundance 7.5<=12+log(O/H)<=8.9. We investigated the dependence of the period-Wesenheit (P-W) relations on the metal content and we found that the slopes of optical and NIR P-W relations in external galaxies are similar to the slopes of Large Magellanic Cloud (LMC) Cepheids. They also agree with the theoretical predictions suggesting that the slopes of the P-W relations are independent of the metal content.2010ApJ...715..277Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/715/277CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/534/A94 : Milky Way Cepheids radial velocities (Storm+, 2011)J/A+A/534/A95 : LMC Cepheids radial velocities (Storm+, 2011)J/A+A/508/355 : Scaled solar tracks and isochrones (Bertelli+, 2009)J/ApJS/183/109 : Cepheids in 3 host galaxies (Riess+, 2009)J/ApJ/679/71 : Mid-IR period-luminosity relations (Freedman+, 2008)J/A+A/476/73 : Calibration of Cepheid Period/Luminosity relation (Fouque+,J/ApJ/647/1056 : ARAUCARIA project : NGC 6822 Cepheid variables (Gieren+, 2006)J/AJ/128/2239 : JHKs photometry of 92 LMC Cepheids (Persson+, 2004)J/A+A/411/361 : VI photometry of extra-galactic Cepheids (Kanbur+, 2003)J/A+A/404/423 : BVI photometry of Galactic Cepheids (Tammann+, 2003)J/ApJS/142/71 : BVRI observations of LMC Cepheids (Sebo+, 2002)J/AcA/51/221 : OGLE-II. Cepheids in IC 1613 (Udalski+, 2001)J/A+AS/143/211 : Galactic Cepheids BVRI photometry (Berdnikov+, 2000)J/A+AS/141/371 : Low-mass stars evolutionary tracks + isochrones (Girardi+,http://www.ipac.caltech.edu/H0kp/ : HST Key Project on the extragalactichttp://sites.google.com/site/araucariaproject/ : Araucaria Project home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/715/277https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/715/277http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/715/277https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/715/277https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/715/277http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/715/277GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/715/277/sample (Galaxy sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/715/277/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/715/277/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/715/277/sample?GETtext/xml+votable180.050000true16.19916672.11777780.0055555555555555566/2155 2320 2709 5545 5639 5751 5975 6619 7241 7606 7743 10818 10977 11434 13522 16701 17165 18041 20526 22751 26271 26336 26338 26858 27351 27512 27514 27728 27918 27942 28035 28123 28167 28299 28529 29718 33096 33317 34531 34538 35514 35536 35925 36287 38390 38846 43262 43874 43881https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/715/277?format=asciiOpticaldefaultJ/ApJ/715/277/sampleGalaxy sampleSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharprimaryRAJ2000? SIMBAD hour of right ascension (J2000)pos.eq.ra;meta.mainnullableDEJ2000? SIMBAD degree of declination (J2000)pos.eq.dec;meta.mainnullableNEDSimbad column added by the CDSmeta.refcharJ/ApJ/715/277/table7Galaxy metal abundancesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharf_NameFlag on name (G1)meta.codecharr_MoldReference for Mold (see refs.dat file)meta.ref;pos.framecharMoldOld metal abundance (12+log(O/H))phys.abund.Zfloate_MoldUncertainty in Moldstat.errorfloatMnewNew metal abundance (12+log(O/H))phys.abund.Zfloatf_Mnew[*] estimated Mnew (1)meta.codecharJ/ApJ/715/277/table8Slopes b(V) and b(I) of observed P-L relations estimated using Cepheids with 0.5{<=}logP{<=}2.0recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharf_NameFlag on Name (G1)meta.codecharMet? Metalicityphys.abund.Zfloatnullableb(V)V band slope in P-L relationshipstat.fit.paramfloate_b(V)Uncertainty in b(V)stat.errorfloatb(I)? I band slope in P-L relationshipstat.fit.paramfloatnullablee_b(I)? Uncertainty in b(I)stat.errorfloatnullablebeta? Slope of observed P-WVI relationshipstat.fit.paramfloatnullablee_beta? Uncertainty in betastat.errorfloatnullableRefsReference(s) (see refs.dat file)meta.ref;pos.framecharJ/ApJ/715/277/table15Distance moduli {mu}_0_(WVI) for the galaxies listed in Table 8recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharn_NameFlag on Name (G1)meta.notecharLMCm-M? LMC distance modulus adopted in the original paper (r_m-M)magphot.mag.distModfloatnullabler_m-MReference(s) on m-M (see refs.dat file)meta.ref;pos.framecharm-M? Distance modulusmagphot.mag.distModfloatnullablee_m-M? Uncertainty in m-Mmagstat.errorfloatnullableFr01? Freedman et al. 2001ApJ...553...47F distance modulusmagphot.mag.distModfloatnullablee_Fr01? Uncertainty in Fr01magstat.errorfloatnullableKa03? Kanbur et al. 2003, Cat. J/A+A/411/361, distance modulusmagphot.mag.distModfloatnullablee_Ka03? Uncertainty in Ka03magstat.errorfloatnullableSTT06? Saha et al. 2006ApJS..165..108S distance modulusmagphot.mag.distModfloatnullablef_STT06[c] c: distance modulus from Sandage & Tammann 2008ApJ...686..779Smeta.codechare_STT06? Uncertainty in STT06magstat.errorfloatnullableOur? Distance modulus from this papermagphot.mag.distModfloatnullablee_Our? Uncertainty in Ourmagstat.errorfloatnullableJ/ApJ/715/277/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.notecharBibCodeBibcodemeta.bib.bibcodecharAutAuthor's name(s)meta.bib.authorcharCommCommentmeta.notechar