J/ApJ/940/64ivo://CDS.VizieR/J/ApJ/940/64doi:10.26093/cds/vizier.19400064CDSYuan W.Macri L.M.Riess A.G.Brink T.G.Casertano S.,Filippenko A.V.Hoffmann S.L.Huang C.D.Scolnic D.2025-02-13T20:11:54Z2024-11-25T12:58:08ZCDS support team

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

cds-question@unistra.frhst-photometryvariable-starsh-ii-regionschemical-abundancesvisible-astronomyOwing to its accurate distance measured from water-maser motions, NGC4258 is one of the most important anchors for calibrating the Cepheid period-luminosity relations (PLRs). We expand on previous efforts and carry out a new Cepheid search in this system using the Hubble Space Telescope. We discover and measure a sample of 669 Cepheids in four new and two archival NGC 4258 fields, doubling the number of known Cepheids in this galaxy and obtaining an absolute calibration of their optical PLRs. We determine a Wesenheit (W_VI_^HST^) PLR of -2.574(+/-0.034)-3.294(+/-0.042)logP, consistent with an independent Large Magellanic Cloud (LMC) calibration at the level of 0.032+/-0.044mag in its zero-point, after accounting for a metallicity dependence of -0.20+/-0.05mag/dex. Our determination of the PLR slope also agrees with the LMC-based value within their uncertainties. We attempt to characterize the metallicity effect of Cepheid PLRs using only the NGC 4258 sample, but a relatively narrow span of abundances limits our sensitivity and yields a W_VI_^HST^ zero-point dependence of -0.07+/-0.21mag/dex. The Cepheid measurements presented in this study have been used as part of the data to derive the Hubble constant in a companion paper by the SH0ES team.2022ApJ...940...64Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/940/64CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/627/579 : Photometry of variables in NGC 3370 (Riess+, 2005)J/ApJ/652/1133 : BVI photometry of NGC 4258 Cepheids (Macri+, 2006)J/A+A/504/959 : Amplitudes of single-mode Cepheids (Klagyivik+, 2009)J/ApJ/699/539 : Cepheids in SN-Ia host galaxies (Riess+, 2009)J/ApJ/730/119 : HST/WFC3 obs. of Cepheids in SN Ia hosts (Riess+, 2011)J/AJ/149/183 : gri photometry of variables in NGC 4258 (Hoffmann+, 2015)J/ApJ/830/10 : HST obs. of Cepheids in SNIa host gal. (Hoffmann+, 2016)J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016)J/ApJ/859/101 : The supernovae Ia Pantheon sample (Scolnic+, 2018)J/ApJ/876/85 : HST observations for LMC Cepheids (Riess+, 2019)J/ApJ/902/26 : HST opt. & H-band obs. of Cepheids in NGC4151 (Yuan+, 2020)J/ApJ/913/38 : Compilation of Cepheids in the MW and MCs (Breuval+, 2021)J/MNRAS/508/4047 : Classical Cepheids HARPSN@TNG spectroscopy (Ripepi+, 2021)J/A+A/659/A167 : Cepheid Period-Wesenheit-Metallicities (Ripepi+, 2022)J/A+A/658/A29 : LMC classical Cepheids Fe and O content (Romaniello+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/940/64https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/940/64http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/940/64https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/940/64https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/940/64http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/940/64GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/940/64/table2 (Cepheid properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/940/64/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/940/64/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/940/64/table2?GETtext/xml+votable180.050000true184.7348788947.269938890.005555555555555556Cone search capability for table J/ApJ/940/64/table4 (H II region metallicity measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/940/64/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/940/64/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/940/64/table4?GETtext/xml+votable180.050000true184.7327947.305190.0055555555555555566/10977 10979-10980 109822.0151732862786345e-19 4.780735699255511e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/940/64?format=asciiOpticaldefaultJ/ApJ/940/64/table2Cepheid propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDPosition based identifier (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharPer[5/75.5] Perioddtime.periodfloatRAJ2000[184.6/184.9] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[47.1/47.4] Declination (J2000)degpos.eq.dec;meta.mainF555W[22.89/27.4] HST/ACS F555W Vega magnitude (1)magphot.mag;em.opt.Vfloate_F555W[0.04/0.7] Uncertainty in F555Wmagstat.error;phot.mag;em.opt.VfloatF814W[21.8/26.4] HST/ACS F814W Vega magnitude (1)magphot.mag;em.opt.Ifloate_F814W[0.02/0.8] Uncertainty in F814Wmagstat.error;phot.mag;em.opt.IfloatF350LP[23.99/27.6]? HST/WFC3 F350LP Vega magnitude (1)magphot.mag;em.opt.Vfloatnullablee_F350LP[0.02/0.3]? Uncertainty in F350LPmagstat.error;phot.mag;em.opt.VfloatnullableAmpV[0.13/0.65] F555W or F350LP amplitudemagsrc.var.amplitude;em.opt.VfloatAmpI[0.09/0.5] F814W amplitudemagsrc.var.amplitude;em.opt.IfloatJ/ApJ/940/64/table4H II region metallicity measurementsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDHII Region ID ({b/n}NN) (1)meta.id;meta.maincharRAJ2000[184.6/184.9] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[47.1/47.4] Declination (J2000)degpos.eq.dec;meta.mainRad[1.4/25.2] Deprojected radiuskpcphys.angSizefloatR23[2.7/8.6] R23 index, Oxygen-to-H_beta line flux ratiophot.flux;arith.ratiofloatZZ94[8.37/9.1] Oxygen abundance Z on the Zaritsky+ 1994ApJ...420...87Z scalephys.abund.ZfloatZPP04[8.2/8.9] Oxygen abundance Z transformed to the Pettini & Pagel 2004MNRAS.348L..59P scalephys.abund.Zfloatsigma[0.03/0.08] Uncertainty in oxygen abundance Zstat.error;phys.abund.ZfloatSourceSource(s) (2)meta.refcharJ/ApJ/940/64/table1Observation logEpoch[1/13] Epochtime.epochintDateDate (UT)time.epochnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldFieldmeta.id;obs.fieldcharDatasetMAST dataset identifier (1)meta.id;meta.datasetcharFiltFilter ("F350LP" for WFC3 fields and "F555W" or "F814W" for ACS)meta.id;instr.filtercharExpTime[400/1600] Exposure timestime.duration;obs.exposurefloatNdit[1/2] Dither numbermeta.numberint