J/ApJ/946/43ivo://CDS.VizieR/J/ApJ/946/43CDSWang S.Chen X.2025-06-02T07:05:25Z2025-04-09T09:04:33ZCDS support team

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

cds-question@unistra.frgiant-starsinfrared-astronomyspectroscopyphotometryvisible-astronomysurveysmagellanic-cloudsextinctionchemical-abundancesPrecise interstellar dust extinction laws are important to infer the intrinsic properties of reddened objects and correctly interpret observations. In this work, we attempt to measure the optical-infrared extinction laws of the Large and Small Magellanic Clouds (LMC and SMC) by using red supergiant (RSG) stars and classical Cepheids as extinction tracers. The spectroscopic RSG samples are constructed based on the APOGEE spectral parameters, Gaia astrometric data, and multiband photometry. We establish the effective temperature-intrinsic color relations for RSG stars and determine the color excess ratio (CER) E({lambda}-G_RP_)/E(G_BP_-G_RP_) for the LMC and SMC. We use classical Cepheids to derive base relative extinction A_Grp_/E(G_BP_-G_RP_). The results are 1.589+/-0.014 and 1.412+/-0.041 for the LMC and SMC. By combining CERs with A_Grp_/E(G_BP_-G_RP_), the optical-infrared extinction coefficients A_{lambda}/A_Grp_ are determined for 16 bands. We adjust the parameters of RV-dependent extinction laws and obtain average extinction laws for the LMC and SMC of R_V_=3.40+/-0.07 and R_V_=2.53+/-0.10, respectively, which are consistent with Gordon et al. In the optical bands, the adjusted RV extinction curves agree with the observations with deviations less than 3%.2023ApJ...946...43Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/946/43CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/236 : UBVR CCD survey of the Magellanic clouds (Massey+, 2002)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)VII/233 : 2MASS All-Sky Extended Source Catalog (XSC) (IPAC/UMass, 2003-2006)II/358 : SkyMapper Southern Sky Survey. DR1.1 (Wolf+, 2018)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)III/286 : APOGEE-2 DR17 final allStar catalog (Abdurro'uf+, 2022)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)II/379 : SkyMapper Southern Sky Survey. DR4 (Onken+, 2024)J/A+AS/125/229 : A standard stellar library (Lejeune+ 1997)J/AcA/48/147 : OGLE SMC BVI photometry (Udalski+ 1998)J/AJ/123/855 : Magellanic Clouds Photometric Survey: SMC (Zaritsky+, 2002)J/AJ/126/2867 : Red supergiants in Magellanic Clouds (Massey+, 2003)J/A+A/410/905 : Interstellar reddening measurements (Patriarchi+, 2003)J/AJ/128/1606 : Magellanic Clouds Photometric Survey: LMC (Zaritsky+, 2004)J/ApJ/663/320 : IR-through-UV extinction curve (Fitzpatrick+, 2007)J/ApJ/707/89 : Variation of mid-IR extinction (Gao+, 2009)J/AJ/140/416 : IR photometry of massive stars in the SMC (Bonanos+, 2010)J/AJ/142/103 : Cool evolved stars in SAGE-SMC and SAGE-LMC (Boyer+, 2011)J/ApJ/727/53 : Red supergiant stars in the LMC. I. (Yang+, 2011)J/ApJ/749/177 : Yellow and red supergiants in the LMC (Neugent+, 2012)J/ApJ/753/71 : Mass-loss return from LMC evolved stars. VI. (Riebel+, 2012)J/A+A/555/A50 : UBVIc photometry of stars in Westerlund 2 (Carraro+, 2013)J/MNRAS/466/4540 : SUMaC I (Hagen+, 2017)J/AJ/154/199 : Survey of the MAgellanic Stellar History (Nidever+, 2017)J/A+A/609/A114 : Local Group AGB stars & red supergiants (Groenewegen+, 2018)J/ApJ/861/153 : UV Extinction in the GALEX Bands. UVEXT (Sun+, 2018)J/A+A/616/A175 : Red supergiant stars in the LMC. II. (Yang+, 2018)J/MNRAS/487/4832 : Per-Lum relation of red supergiants (Chatys+, 2019)J/A+A/628/A51 : Magellanic Clouds reddening map (Joshi+, 2019)J/A+A/629/A91 : A source catalog for the SMC (Yang+, 2019)J/ApJ/898/24 : Granulations of RSGs from ASAS-SN & iPTF (Ren+, 2020)J/ApJ/906/73 : Tot/polarized extinction/em. PostPlanck Era (Hensley+, 2021)J/AJ/161/74 : SMASH DR2. 197 SMASH fields (Nidever+, 2021)J/ApJ/923/232 : Red supergiants in 12 Local Group galaxies (Ren+, 2021)J/A+A/646/A141 : A source catalog for the LMC (Yang+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/946/43https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/946/43http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/946/43https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/946/43https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/946/43http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/946/43GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/946/43/table1 (Spectroscopic red supergiant (RSG) stars in the Magellanic Clouds)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/946/43/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/946/43/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/946/43/table1?GETtext/xml+votable180.050000true76.86381-67.209460.0055555555555555565/8263 8269 8273-8278 8280-8281 8323 6/33041 33045 33047 33050-33051 33067 33072-33073 33075 33081 33084-33085 33089-33091 33116-33118 33128-33129 33136-33137 33140 33287 33297-33299 33304-33306 33316-33317 33319 33328 33330 33794 37474 37512 37536 37538 37546 390428.650015785639275e-20 6.118840631666147e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/946/43?format=asciiOpticalInfrareddefaultJ/ApJ/946/43/table1Spectroscopic red supergiant (RSG) stars in the Magellanic CloudsSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS object name (JHHMMSSss+DDMMSSs)meta.id;meta.maincharRAJ2000[8.6/115.4] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-74.4/-59] Declination (J2000)degpos.eq.dec;meta.mainTeff[3691/4687] Effective temperature from APOGEEKphys.temperature.effectivefloatlog(g)[-0.15/1.5] Log surface gravity from APOGEElog(cm.s**-2)phys.gravityfloat[M/H][-1/-0.4] Metallicity from APOGEElog(Sun)phys.abund.ZfloatE(BP-RP)[-0.2/0.6]? Gaia DR3 Blue-Red color excessmagphot.color.excessdoublenullableGmag[10.89/16.3] Apparent Gaia DR3 G band magnitudemagphot.mag;em.optfloate_Gmag[0.003/0.02] Uncertainty in Gmagmagstat.error;phot.mag;em.optfloatBpmag[11.9/17] Apparent Gaia Blue passband magnitudemagphot.mag;em.opt.Bfloate_Bpmag[0.003/0.2] Uncertainty in Bpmagmagstat.error;phot.mag;em.opt.BfloatRpmag[9.8/15.5] Apparent Gaia Red passband magnitudemagphot.mag;em.opt.Rfloate_Rpmag[0.004/0.05] Uncertainty in Rpmagmagstat.error;phot.mag;em.opt.RfloatUmag[0/20.2]? Apparent U band Vega magnitudemagphot.mag;em.opt.Ufloatnullablee_Umag[0/9.999]? Uncertainty in Umagmagstat.error;phot.mag;em.opt.UfloatnullableBmag[11.88/19.8]? Apparent B band Vega magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag[0.01/0.6]? Uncertainty in Bmagmagstat.error;phot.mag;em.opt.BfloatnullableVmag[10.9/18.5]? Apparent V band Vega magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag[0/0.5]? Uncertainty in Vmagmagstat.error;phot.magfloatnullableumagSM[12.4/21.2]? Apparent SMASH u band AB magnitudemagphot.mag;em.opt.Ufloatnullablee_umagSM[0.003/0.2]? Uncertainty in umagSMmagstat.error;phot.mag;em.opt.UfloatnullablegmagSM[13.19/18.1]? Apparent SMASH g band AB magnitudemagphot.mag;em.opt.Bfloatnullablee_gmagSM[0.001/0.3]? Uncertainty in gmagSMmagstat.error;phot.mag;em.opt.BfloatnullablevmagSky[11.8/18.6]? Apparent SKYMAPPER v band AB magnitudemagphot.mag;em.opt.VfloatnullablegmagSky[11.86/16.1]? Apparent SKYMAPPER g band AB magnitudemagphot.mag;em.opt.BfloatnullablermagSky[10.78/15.01]? Apparent SKYMAPPER r band AB magnitudemagphot.mag;em.opt.RfloatnullableimagSky[9.99/14.4]? Apparent SKYMAPPER i band AB magnitudemagphot.mag;em.opt.IfloatnullablezmagSky[9.6/14.1]? Apparent SKYMAPPER z band AB magnitudemagphot.mag;em.opt.IfloatnullableJmag[8.29/14.4] 2MASS J band Vega magnitudemagphot.mag;em.IR.Jfloate_Jmag[0.018/0.09]? Uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag[7.5/12.2] 2MASS H band Vega magnitudemagphot.mag;em.IR.Hfloate_Hmag[0.018/0.07]? Uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKsmag[7.19/12] 2MASS Ks band Vega magnitudemagphot.mag;em.IR.Kfloate_Ksmag[0.016/0.05]? Uncertainty in Ksmagmagstat.error;phot.mag;em.IR.KfloatnullableMCGalaxy identifier ("LMC" or "SMC")meta.id.parentcharGaiaDisplay data from Gaia DR3 (I/355) within 1.5"meta.ref.urlcharMCPSDisplay data from MCPS -LMC (Zaritsky+ 2004, J/AJ/128/1606) or -SMC (Zaritsky+ 2002, J/AJ/123/855) within 3"meta.ref.urlcharSMSSDisplay data from SMSS DR1.1 (II/358) within 2.5"meta.ref.urlchar