J/ApJS/260/41ivo://CDS.VizieR/J/ApJS/260/41doi:10.26093/cds/vizier.22600041CDSWang Y.Gao J.Ren YiChen B.2025-08-20T20:09:50Z2022-09-13T14:42:13ZCDS support team

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

cds-question@unistra.frsupergiant-starsob-starsstellar-spectral-typesgalaxiesextinctioninfrared-photometryvisible-astronomybroad-band-photometryultraviolet-astronomyThe dust extinction curves toward individual sight lines in M33 are derived for the first time with a sample of reddened O-type and B-type supergiants obtained from the Local Group Galaxies Survey (LGGS). The observed photometric data are obtained from the LGGS, PS1 Survey, UKIRT, PHATTER Survey, Galaxy Evolution Explorer, Swift/UVOT, and XMM-SUSS. We combine the intrinsic spectral energy distributions (SEDs) obtained from the ATLAS9 and Tlusty stellar model atmosphere extinguished by the model extinction curves from the silicate-graphite dust model to construct model SEDs. The extinction traces are distributed along the arms in M33, and the derived extinction curves cover a wide range of shapes (R_V_~2-6), indicating the complexity of the interstellar environment and the inhomogeneous distribution of interstellar dust in M33. The average extinction curve with R_V_~3.39 and dust size distribution dn/da~a^-3.45^exp(-a/0.25) is similar to that of the Milky Way but with a weaker 2175{AA} bump and a slightly steeper rise in the far-UV band. The extinction in the V band of M33 is up to 2mag, with a median value of A_V_~0.43mag. The multiband extinction values from the UV to IR bands are also predicted for M33, which will provide extinction corrections for future works. The method adopted in this work is also applied to other star-resolved galaxies (NGC 6822 and WLM), but only a few extinction curves can be derived because of the limited observations.2022ApJS..260...41Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/260/41CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/swift : Swift Master Catalog (HEASARC, 2004-)B/hst : HST Archived Exposures Catalog (STScI, 2007)II/339 : Swift/UVOT Serendipitous Source Catalog (Yershov, 2015)II/335 : Revised cat. of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)II/370 : XMM-OM Serendipitous Source Survey Cat. (XMM-SUSS5.0) (Page+, 2021)J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006)J/ApJ/663/320 : IR-through-UV extinction curve (Fitzpatrick+, 2007)J/AJ/133/2393 : UBVRI phot. in 7 Local Group dwarfs galaxies (Massey+, 2007)J/ApJ/707/89 : Variation of mid-IR extinction (Gao+, 2009)J/ApJ/737/73 : Infrared extinction toward the Galactic Centre (Fritz+, 2011)J/ApJ/733/91 : Diffuse interstellar band equivalent widths (Xiang+, 2011)J/A+A/545/A141 : UV selected sources in the GOODS-S field (Buat+, 2012)J/ApJS/215/9 : PHAT X. UV-IR photometry of M31 stars (Williams+, 2014)J/AJ/152/62 : Revised LGGS UBVRI phot. of M31 and M33 stars (Massey+, 2016)J/ApJS/241/32 : OB stars from the LAMOST DR5 spectra (Liu+, 2019)J/ApJS/241/35 : Period-luminosity relations of RSGs in M33 & M31 (Ren+, 2019)J/ApJ/907/18 : Red Supergiants in M31 and M33. I. (Ren+, 2021)J/AJ/163/16 : Multiwavelength study in M33 star clusters (Moeller+, 2022)J/ApJS/253/53 : PHATTER. I. 22 million stars HST obs. in M33 (Williams+, 2021)J/ApJS/259/12 : Dust extinction law in nearby galaxies. I. M31 (Wang+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/260/41https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/260/41http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/260/41https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/260/41https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/260/41http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/260/41GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/260/41/table2 (List of the selected tracers in the with spectral type, fitting parameters, derived E(B-V), R_V_ and information about observed photometry adopted in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/260/41/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/260/41/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/260/41/table2?GETtext/xml+votable180.050000true23.054833330.460.005555555555555556Cone search capability for table J/ApJS/260/41/table5 (List of multiband extinction values for individual tracers)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/260/41/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/260/41/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/260/41/table5?GETtext/xml+votable180.050000true23.054708330.45997220.0055555555555555566/2154-2155 2240-22418.297946179207444e-20 1.4134638842407062e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/260/41?format=asciiUVOpticalInfrareddefaultJ/ApJS/260/41/table2List of the selected tracers in the with spectral type, fitting parameters, derived E(B-V), R_V_ and information about observed photometry adopted in this workrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLGGSID from the LGGS (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimaryKmag[15.9/21.65]? UKIRT/WFCAM K band magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag[0.01/1.1]? Error in Kmagmagstat.error;phot.magfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharF(UVW2/UVOT)UVOT/UVW2 flux10mW.m**-2.nm**-1phot.flux;em.UVchare_F(UVW2/UVOT)Error in F (UVW2/UVOT)10mW.m**-2.nm**-1stat.errorcharSpTypeSpectral typesrc.spTypecharalpha[2.67/5.82] Exponent in dust size distribution (2)(1)stat.fit.paramfloate_alpha[0.03/2.3] Lower uncertainty, alpha (2)stat.error;pos.eq.rafloatE_alpha[0.03/1.5] Upper uncertainty, alpha (2)stat.error;stat.maxfloatlogTeff[4/4.6] Effective temperature, loglog(K)phys.temperature.effectivefloate_logTeff[0/0.07] Lower uncertainty, logTeff (2)log(K)stat.error;phys.temperature.effectivefloatE_logTeff[0/0.07] Upper uncertainty, logTeff (2)log(K)stat.error;stat.maxfloatlogg[2.25/3.51] Surface gravity, loglog(cm.s**-2)phys.gravityfloate_logg[0.02/0.2] Lower uncertainty, logg (2)log(cm.s**-2)stat.errorfloatE_logg[0.02/0.2] Upper uncertainty, logg (2)log(cm.s**-2)stat.error;stat.maxfloatAv[0.13/2] Extinction in V bandmagphys.absorptionfloate_Av[0.03/0.2] Lower uncertainty, Av (2)magstat.errorfloatE_Av[0.03/0.2] Upper uncertainty, Av (2)magstat.error;stat.maxfloata[5.78/10.1] Average dust size (G1)nmphys.angSize;stat.meanfloatE(B-V)[0.06/0.5] The color excessmagphot.color.excessfloatRv[1.87/6.3] The total-to-selective extinction ratiophys.absorption.gal;arith.ratiofloatNbands[5/22] The number of passbands used in calculationmeta.numberintpcFlagFlag for the coverage of passbands adopted in the calculation (G2)meta.codecharF(UVW2/XMM)Source flux in XMM/UVW2 filter10mW.m**-2.nm**-1phot.flux;em.UVchare_F(UVW2/XMM)Error in F (UVW2/UVOT)10mW.m**-2.nm**-1stat.errorcharF(UVM2/XMM)Source flux in XMM/UVM2 filter10mW.m**-2.nm**-1phot.flux;em.UVchare_F(UVM2/XMM)Error in F (UVM2/UVOT)10mW.m**-2.nm**-1stat.errorcharF(UVW1/XMM)Source flux in XMM/UVW1 filter10mW.m**-2.nm**-1phot.flux;em.UVchare_F(UVW1/XMM)Error in F (UVW1/XMM)10mW.m**-2.nm**-1stat.errorcharF275Wmag[15.75/19.01]? HST/WFC3 F275W band VEGA magnitudemagphot.mag;em.UV.200-300nmfloatnullablee_F275Wmag[0.003/0.02]? Error in F275W bandmagstat.errorfloatnullableF336Wmag[16.32/18.71]? HST/WFC3 F336W band VEGA magnitudemagphot.mag;em.opt.Ufloatnullablee_F336Wmag[0.001/0.006]? Error in F336W bandmagstat.errorfloatnullableF475Wmag[17.26/19.57]? HST/ACS F475W band VEGA magnitudemagphot.mag;em.opt.Bfloatnullablee_F475Wmag[0.001/0.02]? Error in F475W bandmagstat.errorfloatnullableF814Wmag[17.14/19.28]? HST/ACS F814W band VEGA magnitudemagphot.mag;em.opt.Ifloatnullablee_F814Wmag[0.001/0.02]? Error in F814W bandmagstat.errorfloatnullableF110Wmag[17.2/19.31]? HST/WFC3 F110W band VEGA magnitudemagphot.mag;em.IR.Jfloatnullablee_F110Wmag[0.001/0.003]? Error in F110W bandmagstat.errorfloatnullableF160Wmag[17.1/19.21]? HST/WFC3 F160W band VEGA magnitudemagphot.mag;em.IR.Hfloatnullablee_F160Wmag[0.001/0.003]? Error in F160W bandmagstat.errorfloatnullableJmag[16/19.7]? UKIRT/WFCAM J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[0.01/0.2]? Error in Jmagmagstat.error;phot.magfloatnullableHmag[15.94/20.83]? UKIRT/WFCAM H band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag[0.01/0.4]? Error in Hmagmagstat.error;phot.magfloatnullableVmag[16.48/20.9] LGGS V band magnitudemagphot.mag;em.opt.Vfloate_Vmag[0/0.005] Error in Vmagmagstat.error;phot.magfloat(B-V)[-0.26/0.35] LGGS B-V color indexmagphot.color;em.opt.B;em.opt.Vfloate_(B-V)[0.003/0.03] Error in (B-V)magstat.errorfloat(U-B)[-1.16/0.13] LGGS U-B color indexmagphot.color;em.opt.U;em.opt.Bfloate_(U-B)[0.003/0.02] Error in (U-B)magstat.errorfloat(V-R)[-0.091/0.24] LGGS V-R color indexmagphot.color;em.opt.V;em.opt.Rfloate_(V-R)[0.003/0.02] Error in (V-R)magstat.errorfloat(R-I)[-0.17/0.33]? LGGS R-I color indexmagphot.color;em.opt.R;em.opt.Ifloatnullablee_(R-I)[0.003/0.02]? Error in (R-I)magstat.errorfloatnullablegmag[16.9/19.63]? PS1 g band magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag[0.005/0.08]? Error in gmagmagstat.error;phot.magfloatnullablermag[16.9/19.8]? PS1 r band magnitudemagphot.mag;em.opt.Rfloatnullablee_rmag[0.005/0.04]? Error in rmagmagstat.error;phot.magfloatnullableimag[17/19.91]? PS1 i band magnitudemagphot.mag;em.opt.Ifloatnullablee_imag[0.003/0.05]? Error in imagmagstat.error;phot.magfloatnullablezmag[17.23/20.1]? PS1 z band magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag[0.006/0.08]? Error in zmagmagstat.error;phot.magfloatnullableymag[17.34/20.1]? PS1 y band magnitudemagphot.mag;em.IR.Jfloatnullablee_ymag[0.009/0.1]? Error in ymagmagstat.error;phot.magfloatnullableF(UVM2/UVOT)UVOT/UVM2 flux10mW.m**-2.nm**-1phot.flux;em.UVchare_F(UVM2/UVOT)Error in F (UVM2/UVOT)10mW.m**-2.nm**-1stat.errorcharF(UVW1/UVOT)UVOT/UVW1 flux10mW.m**-2.nm**-1phot.flux;em.UVchare_F(UVW1/UVOT)Error in F (UVW1/UVOT)10mW.m**-2.nm**-1stat.errorcharF(FUV)[17.986/52.368]? GALEX FUV fluxmJyphot.flux;em.UVfloatnullablee_F(FUV)[3.359/6.325]? Error in F (FUV)mJystat.errorfloatnullableF(NUV)[92.191/125.528]? GALEX NUV fluxmJyphot.flux;em.UVfloatnullablee_F(NUV)[5.413/6.094]? Error in F (NUV)mJystat.errorfloatnullableM16Display data from Massey+, 2016, J/AJ/152/62meta.ref.urlcharPS1Display data from the PS1 (II/349) within 1"meta.ref.urlcharPHATTERDisplay data from the PHATTER I cat. (Williams+, 2021, J/ApJS/253/53) within 0.3"meta.ref.urlcharXSUSSDisplay data from the XMM-SUSS5.0 catalog (II/370) within 0.5"meta.ref.urlcharUVOTDisplay data from the Swift/UVOT cat. (Yershov, 2015, II/339) within 3"meta.ref.urlchar_RAPositions from LGGS names (right ascension part)degpos.eq.ra;meta.main_DEPositions from LGGS names (declination part)degpos.eq.dec;meta.mainSEDUV-NIR SED plot of this starmeta.ref.urlcharJ/ApJS/260/41/table5List of multiband extinction values for individual tracersLGGSID from the LGGS (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimarySpTypeSpectral typesrc.spTypecharA(F275W)[0.36/5.24] Extinction in F275W/PHAT bandmagphys.absorptionfloatSimbadSimbad column added by the CDSmeta.ref.urlcharA(R)[0.1/1.44] Extinction in R bandmagphys.absorptionfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[1] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[30/31] Degree of Declination (J2000)pos.eq.dec;meta.mainalpha[2.67/5.9] Exponent in dust size distributionstat.fit.paramfloata[5.78/10.07] Average dust size (G1)nmphys.angSize;stat.meanfloatE(B-V)[0.06/0.47] The color excessmagphot.color.excessfloatpcFlagFlag for the coverage of passbands adopted in the calculation (G2)meta.codecharA(V)[0.13/1.9] Extinction in V bandmagphys.absorptionfloatA(UVW2)[0.62/8.94] Extinction in UVW2/UVOT bandmagphys.absorptionfloatA(UVM2)[0.58/8.47] Extinction in UVM2/UVOT bandmagphys.absorptionfloatA(UVW1)[0.37/5.39] Extinction in UVW1/UVOT bandmagphys.absorptionfloatA(NUV)[0.32/4.7] Extinction in NUV/CSST bandmagphys.absorptionfloatA(F336W)[0.26/3.77] Extinction in F336W/PHAT bandmagphys.absorptionfloatA(U)[0.24/3.46] Extinction in U bandmagphys.absorptionfloatA(B)[0.18/2.58] Extinction in B bandmagphys.absorptionfloatA(F475W)[0.16/2.34] Extinction in F475W/PHAT bandmagphys.absorptionfloatA(g)[0.16/2.35] Extinction in g/CSST bandmagphys.absorptionfloatA(r)[0.11/1.64] Extinction in r/CSST bandmagphys.absorptionfloatA(i)[0.08/1.2] Extinction in i/CSST bandmagphys.absorptionfloatA(F814W)[0.08/1.12] Extinction in F814W/CSST bandmagphys.absorptionfloatA(I)[0.07/1.0] Extinction in I bandmagphys.absorptionfloatA(z)[0.06/0.91] Extinction in z/CSST bandmagphys.absorptionfloatA(y)[0.06/0.8] Extinction in y/CSST bandmagphys.absorptionfloatA(F110W)[0.05/0.66] Extinction in F110W/PHAT bandmagphys.absorptionfloatA(J)[0.04/0.56] Extinction in J/2MASS bandmagphys.absorptionfloatA(F160W)[0.03/0.39] Extinction in F160W/PHAT bandmagphys.absorptionfloatA(H)[0.02/0.34] Extinction in H/2MASS bandmagphys.absorptionfloatA(K)[0.01/0.22] Extinction in K/2MASS bandmagphys.absorptionfloat