J/ApJ/655/851ivo://CDS.VizieR/J/ApJ/655/851doi:10.26093/cds/vizier.16550851CDSZhang W.Kong X.Li C.Zhou H.-Y.Cheng F.-Z.2009-03-31T15:39:46Z2009-03-31T15:32:45ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyWe use a large sample of 174 Wolf-Rayet (W-R) galaxies drawn from the Sloan Digital Sky Survey to study whether and how the slope of the stellar initial mass function depends on metallicity. We calculate for each object its oxygen abundance, according to which we divide our sample into four metallicity subsamples. For each subsample, we then measure three quantities: the equivalent width of the H{beta} emission line, the equivalent width of the W-R bump around 4650{AA}, and the W-R bump-to-Hbeta intensity ratio, and compare to the predictions of the same quantities by evolutionary synthesis models of Schaerer & Vacca (1998ApJ...497..618S).2007ApJ...655..851Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/655/851CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/485/657 : Physical parameters of Wolf-Rayet galaxies (Brinchmann+, 2008)J/A+AS/136/35 : WR galaxies and HII regions catalog (Schaerer+ 1999)http://sdss.org : SDSS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/655/851https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/655/851http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/655/851https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/655/851https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/655/851http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/655/851GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/655/851/table1 (Parameters of the WR sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/655/851/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/655/851/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/655/851/table1?GETtext/xml+votable180.050000true2.470362215.73530.0055555555555555566/4096 4109 4164 4181 5083 5097 5100 5107 5607 5623 5624 5629 5631 5690 5757 5764 5771 5799 5818 5828 5840 5902 5927 5971 5975 5983 5986 6005 6042 6063 6075 6085 6255 6463 6470 6581 6604 6619 7191 7205 7207 7208 7235 7259 7261 7272 7281 7283 7303 7304 7315 7381 7441 7523 9319 9474 9855 9863 9986 10104 10106 10144 10202 10219 10583 10596 10619 10955 10991 11101 11115 11172 11186 11201 11234 11239 11269 11283 11326 11355 11380 11403 11405 11414 11435 11480 11816 11825 11841 11907 18002 18013 18025 18063 18098 18295 18392 18523 18618 18845 19389 19406 19678 19754 19756 21877 25594 25597 25938 25946 25947 25959 25987 26044 26096 26142 26178 26205 26234 26268 26297 26302 26323 26331 26338 26342 26377 26392 26400 26967 26984 27053 27062 27088 27199 27227 27238 27243 27260 27320 27332 27333 27334 27366 27402 27446 27458 27463 27652 27657 27665 27668 27691 27697 27811 31316 32682 36716 36727 36766 36767 36775 36785 49095https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/655/851?format=asciiOpticaldefaultJ/ApJ/655/851/table1Parameters of the WR samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSS-IDThe SDSS spectroscopic identification (1)meta.id;meta.maincharOII3727? The [OII] (3727{AA}) intensity (2)spect.line.intensity;arith.ratiofloatnullableH10? The H10 (3798{AA}) intensity (2)spect.line.intensity;arith.ratiofloatnullableH9? The H9 (3836{AA}) intensity (2)spect.line.intensity;arith.ratiofloatnullableH8The H8 (3890{AA}) intensity (2)spect.line.intensity;arith.ratiofloatH7The H7 (3970{AA}) intensity (2)spect.line.intensity;arith.ratiofloatHdThe H{delta} (4100{AA}) intensity (2)spect.line.intensity;arith.ratiofloatHgThe H{gamma} (4340{AA}) intensity (2)spect.line.intensity;arith.ratiofloatOIII4363? The [OIII] (4363{AA}) intensity (2)spect.line.intensity;arith.ratiofloatnullableOIII4959? The [OIII] (4959{AA}) intensity (2)spect.line.intensity;arith.ratiofloatnullableOIII5007? The [OIII] (5007{AA}) intensity (2)spect.line.intensity;arith.ratiofloatnullableHa? The H{alpha} (6563{AA}) intensity (2)spect.line.intensity;arith.ratiofloatnullableSII6717The [SII] (6717{AA}) intensity (2)spect.line.intensity;arith.ratiofloatSII6731The [SII] (6731{AA}) intensity (2)spect.line.intensity;arith.ratiofloatNII6548The [NII] (6548{AA}) intensity (2)spect.line.intensity;arith.ratiofloatNII6583The [NII] (6583{AA}) intensity (2)spect.line.intensity;arith.ratiofloatOII7320? The [OII] (7320{AA}) intensity (2)spect.line.intensity;arith.ratiofloatnullableOII7330? The [OII] (7330{AA}) intensity (2)spect.line.intensity;arith.ratiofloatnullableHbObserved H{beta} (4861{AA}) intensity (3)1e-20W.m**-2phot.flux;em.line.HbetafloatEWHbThe H{beta} equivalent width0.1nmspect.line.eqWidth;em.line.HbetafloatW-RW-R bump (4650{AA}) intensity ratio (2)spect.line.intensity;arith.ratiofloatEW4650The blue W-R bump equivalent width0.1nmspect.line.eqWidthfloatO/HThe 12+log(O/H) abundancephys.abundfloatn_O/HMethod used to estimate O/H (4)meta.notecharSDSSDisplay the SDSS data for this WR galaxymeta.ref.urlchar_RAPositions, from SDSS (DR6) (right ascension part)degpos.eq.ra;meta.main_DEPositions, from SDSS (DR6) (declination part)degpos.eq.dec;meta.main