J/ApJ/842/42ivo://CDS.VizieR/J/ApJ/842/42doi:10.26093/cds/vizier.18420042CDSMadore B.F.Freedman W.L.Moak S.2018-05-16T06:59:25Z2018-03-05T11:47:15ZCDS support team

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

cds-question@unistra.frvariable-starsinterstellar-reddeningstellar-distanceabsolute-magnitudevisible-astronomytrigonometric-parallaxWe present a new photometric method by which improved high-precision reddenings and true distance moduli can be determined to individual Galactic Cepheids once distance measurements are available. We illustrate that the relative positioning of stars in the Cepheid period-luminosity (PL) relation (Leavitt law) is preserved as a function of wavelength. This information then provides a powerful constraint for determining reddenings to individual Cepheids, as well as their distances. As a first step, we apply this method to the 59 Cepheids in the compilation of Fouque et al. Updated reddenings, distance moduli (or parallaxes), and absolute magnitudes in seven (optical through near-infrared) bands are given. From these intrinsic quantities, multiwavelength PL and color-color relations are derived. We find that the V-band period-luminosity-color relation has an rms scatter of only 0.06mag, so that individual Cepheid distances can be measured to 3%, compared with dispersions of 6 to 13% for the one-parameter K through B PL relations, respectively. This method will be especially useful in conjunction with the new accurate parallax sample upcoming from Gaia.2017ApJ...842...42Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/842/42CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/476/73 : Calibration of Cepheid P/L relation (Fouque+, 2007)J/A+A/534/A95 : LMC Cepheids radial velocities (Storm+, 2011)J/A+A/550/A70 : Galactic and MC Cepheids distance (Groenewegen, 2013)J/AJ/149/117 : LMC infrared survey. I. Photometry of Cepheids (Macri+, 2015)J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/842/42https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/842/42http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/842/42https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/842/42https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/842/42http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/842/42GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/842/42/table1 (Properties of 59 Galactic Cepheids)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/842/42/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/842/42/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/842/42/table1?GETtext/xml+votable180.050000true97.142031430.49303170.0055555555555555566/12934 12971 13201 13288 13931 13933 14047 14262 14409 14436 14625 15633 22219 23622 23922 24411 28717 28779 28831 28991 29032 29081 29095 29104 29665 29875 29897 30128 30258 30321 30322 32074 33804 37303 37674 37721 37867 37888 37930 37931 38022 38049 39232 39244 39410 39766 39771 41461 41608 41667 41673 41722 41810 41842 41862 42153 43017https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/842/42?format=asciiOpticaldefaultJ/ApJ/842/42/table1Properties of 59 Galactic CepheidsSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalactic Cepheid namemeta.id;meta.maincharlog(P)-F07[0.5/1.7] log Period (1)log(d)time.perioddoubleE(B-V)-F07[0.01/1] E(B-V) reddening (1)magphot.color.excessfloatDM-o-F07[6.9/13.4] Adopted distance modulusmagphot.mag.distModfloatplx-F07[0.2/4.2] Adopted parallax (1)maspos.parallax.trigfloate_plx-F07[0.01/0.3] Uncertainty in plx-F07 (1)masstat.errorfloatBMag-F07[-5/-1.8] B band absolute magnitude (1)magphys.magAbs;em.opt.BfloatVMag-F07[-6/-2.4] V band absolute magnitude (1)magphys.magAbs;em.opt.VfloatRMag-F07[-6.6/-2.8] R band absolute magnitude (1)magphys.magAbs;em.opt.RfloatIMag-F07[-7/-3.1] I band absolute magnitude (1)magphys.magAbs;em.opt.IfloatJMag-F07[-7.6/-3.6] J band absolute magnitude (1)magphys.magAbs;em.IR.JfloatHMag-F07[-8/-3.9] H band absolute magnitude (1)magphys.magAbs;em.IR.HfloatKMag-F07[-8/-4] K band absolute magnitude (1)magphys.magAbs;em.IR.KfloatE(B-V)[0.04/1.1] E(B-V) reddening, this workmagphot.color.excessfloatDM-o[6.6/13.4] Adopted distance modulus, this workmagphot.mag.distModfloatplx[0.2/4.8] Adopted parallax, this workmaspos.parallax.trigfloate_plx[0.01/8] Uncertainty in parallax, this workmasstat.error;pos.parallaxfloatBMag[-5/-1.6] B band absolute magnitude, updated in this workmagphys.magAbs;em.opt.BfloatVMag[-6/-2.3] V band absolute magnitude, updated in this workmagphys.magAbs;em.opt.VfloatRMag[-6.4/-2.7] R band absolute magnitude, updated in this workmagphys.magAbs;em.opt.RfloatIMag[-6.7/-3.1] I band absolute magnitude, updated in this workmagphys.magAbs;em.opt.IfloatJMag[-7.3/-3.7] J band absolute magnitude, updated in this workmagphys.magAbs;em.IR.JfloatHMag[-7.7/-3.9] H band absolute magnitude, updated in this workmagphys.magAbs;em.IR.HfloatKMag[-7.8/-4.1] K band absolute magnitude, updated in this workmagphys.magAbs;em.IR.Kfloat_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.main