J/AJ/151/23ivo://CDS.VizieR/J/AJ/151/23doi:10.26093/cds/vizier.51510023CDSPang X.Pasquali A.Grebel E.K.2018-01-05T08:56:43Z2016-07-18T07:16:29ZCDS support team

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

cds-question@unistra.frh-ii-regionsopen-star-clustershst-photometrystellar-spectral-typestwo-color-diagramsextinctionWe use photometry in the F220W, F250W, F330W, F435W filters from the High Resolution Channel of the Advanced Camera for Surveys and photometry in the F555W, F675W, and F814W filters from the Wide Field and Planetary Camera 2 aboard the Hubble Space Telescope to derive individual stellar reddenings and extinctions for stars in the HD97950 cluster in the giant HII region NGC 3603. The mean line of sight reddening for about a hundred main-sequence member stars inside the cluster is E(F435W-F555W)=1.33+/-0.12mag. After correcting for foreground reddening, the total to selective extinction ratio is R_F555W_=3.75+/-0.87 in the cluster. Within the standard deviation associated with E({lambda}-F555W)/E(F435W-F555W) in each filter, the cluster extinction curve at ultraviolet wavelengths tends to be grayer than the average Galactic extinction laws from Cardelli et al. and Fitzpatrick. It is closer to the extinction law derived by Calzetti et al. for starburst galaxies, where the 0.2175{mu}m bump is absent. This indicates an anomalous extinction in the HD97950 cluster, which may due to the clumpy dust distribution within the cluster, and the size of dust grains being larger than the average Galactic ISM.2016AJ....151...23Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/151/23CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)II/114 : UV Interstellar Extinction (Savage+ 1985)J/A+A/582/A66 : SABOCA NGC 3603 IRS 9A images (Hummel+, 2015)J/ApJ/799/100 : Herschel FIR observations of NGC3603 (Cecco+, 2015)J/ApJ/764/73 : HST VI photometry of HD97950 cluster members starsJ/ApJ/675/1319 : Infrared photometry of NGC 3603 (Harayama+, 2008)J/MNRAS/368/253 : Faint emission lines in M16, M20, NGC 3603J/AJ/127/1014 : CCD UBVRIHa photometry in NGC 3603 (Sung+, 2004)J/MNRAS/327/23 : CCD UBVRI photometry of 7 open star clusters (Sagar+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/151/23https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/151/23http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/151/23https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/151/23https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/151/23http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/151/23GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/151/23/table3 (The color excesses and extinctions of member stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/151/23/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/151/23/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/151/23/table3?GETtext/xml+votable180.050000true168.7788391-61.26087190.005555555555555556Cone search capability for table J/AJ/151/23/table1 (The ultraviolet (UV) and optical photometry of member stars in the HD97950 cluster)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/151/23/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/151/23/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/151/23/table1?GETtext/xml+votable180.050000true168.781601-61.26059720.005555555555555556Cone search capability for table J/AJ/151/23/table2 (Photometry of main sequence stars with spectral types)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/151/23/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/151/23/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/151/23/table2?GETtext/xml+votable180.050000true168.7793427-61.26086040.0055555555555555566/379242.0401237512456292e-19 9.17325329542146e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/151/23?format=asciiOpticaldefaultJ/AJ/151/23/table3The color excesses and extinctions of member starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName[1/111] Member star running number (internal)meta.id;meta.mainintRAJ2000Right Ascension in decimal degrees (J2000) (G1)degphys.absorptionDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainE220-435[4.3/5.5] Individual star color excess, E(F220W-F435W)magphot.color.excessfloatE250-435[2.4/3.4] Individual star color excess, E(F250W-F435W)magphot.color.excessfloatE330-435[1.1/2] Individual star color excess, E(F330W-F435W)magphot.color.excessfloatE435-555[1.1/2] Individual star color excess, E(F435W-F555W)magphot.color.excessfloatE555-675[1/1.3] Individual star color excess, E(F555W-F675W)magphot.color.excessfloatE555-814[1.7/2.2] Individual star color excess, E(F555W-F814W)magphot.color.excessfloatA220[8.4/14.4] Individual star extinction (F220W)magphys.absorptionfloatA250[6.2/12.2] Individual star extinction (F250W)magphys.absorptionfloatA330[4.8/10.7] Individual star extinction (F330W)magphys.absorptionfloatA435[3.6/9.3] Individual star extinction (F435W)magphys.absorptionfloatA555[2.4/7.9] Individual star extinction (F555W)magphys.absorptionfloatA675[1.3/6.8] Individual star extinction (F675W)magphys.absorptionfloatA814[0.5/6] Individual star extinction (F814W)magphys.absorptionfloatR555[2/5.7] Ratio of total to selective extinction (F555W)magphys.absorptionfloatJ/AJ/151/23/table1The ultraviolet (UV) and optical photometry of member stars in the HD97950 clusterrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStar[1/142] Member star running number (internal)meta.id;meta.mainintP13Simbad column added by the CDSmeta.ref.urlintnullableT3Simbad column added by the CDSmeta.ref.urlintnullableSpTSimbad column added by the CDSmeta.ref.urlintnullableRAJ2000Right Ascension in decimal degrees (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainF220W[15.3/23] HST/HRC F220W band magnitude (G2)magphot.mag;em.UV.200-300nmfloate_F220W[0.003/0.198] 1{sigma} uncertainty in F220Wmagstat.errorfloatF250W[13.5/21.3] HST/HRC F250W band magnitude (G2)magphot.mag;em.UV.200-300nmfloate_F250W[0.002/0.169] 1{sigma} uncertainty in F250Wmagstat.errorfloatF330W[12.6/20.1] HST/HRC F330W band magnitude (G2)magphot.mag;em.opt.Ufloate_F330W[0.002/0.154] 1{sigma} uncertainty in F330Wmagstat.errorfloatF435W[12.9/19.8] HST/HRC F435W band magnitude (G2)magphot.mag;em.opt.Bfloate_F435W[0.002/0.077] 1{sigma} uncertainty in F435Wmagstat.errorfloatF555W[11.9/18.4] HST/WFPC2 F555W band magnitude (G2)magphot.mag;em.opt.Vfloate_F555W[0.002/0.021] 1{sigma} uncertainty in F555Wmagstat.errorfloatF675W[11/17.5] HST/WFPC2 F675W band magnitude (G2)magphot.mag;em.opt.Rfloate_F675W[0.002/0.024] 1{sigma} uncertainty in F675Wmagstat.errorfloatF814W[10.3/16.8] HST/WFPC2 F814W band magnitude (G2)magphot.mag;em.opt.Ifloate_F814W[0.002/0.08] 1{sigma} uncertainty in F814Wmagstat.errorfloatJ/AJ/151/23/table2Photometry of main sequence stars with spectral typesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameMelena et al. (2008AJ....135..878M) designationmeta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainF220W[15.8/17.5] HST/HRC F220W band magnitude (G2)magphot.mag;em.UV.200-300nmfloatF250W[14/15.7] HST/HRC F250W band magnitude (G2)magphot.mag;em.UV.200-300nmfloatF330W[13.2/15] HST/HRC F330W band magnitude (G2)magphot.mag;em.opt.UfloatF435W[13.6/15.4] HST/HRC F435W band magnitude (G2)magphot.mag;em.opt.BfloatF555W[12.6/14.5] HST/WFPC2 F555W band magnitude (G2)magphot.mag;em.opt.VfloatF675W[11.7/13.5] HST/WFPC2 F675W band magnitude (G2)magphot.mag;em.opt.RfloatF814W[11/12.9] HST/WFPC2 F814W band magnitude (G2)magphot.mag;em.opt.IfloatSpTSpectral Typesrc.spTypechar(U-B)0[-1.221/-1.183] Empirical ZAMS (U-B) color index (1)magphot.color;em.opt.U;em.opt.Bfloat(B-V)0[-0.321/-0.32] Empirical ZAMS (B-V) color index (1)magphot.color;em.opt.B;em.opt.Vfloat