J/A+A/443/851ivo://CDS.VizieR/J/A+A/443/851doi:10.26093/cds/vizier.34430851CDSSelman F.J.Melnick J.2017-12-07T07:26:54Z2007-09-06T04:11:24ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsstellar-associationsvisible-astronomybroad-band-photometryeffective-temperatureThe star-formation history and IMF of the field population of the 30 Doradus super-association is determined using Wide Field Imager photometry. The cluster NGC 2070 and the OB association LH104 are also studied and used for comparison. The star-formation history of the 30~Doradus super-association appears to be characterized by a large increase in star-formation activity 10Myr to 20Myr ago. This seems to be the case across the whole eastern half of the LMC as demonstrated by the ages of stellar populations as far away as 30 Doradus and Shapley's Constellation III. Star-formation appears to be occurring at a constant rate in the field and in loose associations, and in bursts in the clusters. The field IMF is found to have almost the exact Salpeter slope in the range 7M_{sun}_<=M<=40M_{sun}_, at odds with previous claims. We find that, for objects with more complex star-formation histories, Be stars and selective incompleteness strongly affect the determination of the IMF for M>40M_{sun}_, naturally explaining the observed deviation of the high mass IMF slope from the Salpeter value.The present work supports the idea of a universal IMF.2005A&A...443..851Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/443/851CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/187 : 30 Doradus OB Associations (Parker 1992)J/A+A/341/98 : The ionizing cluster of 30 Doradus. I. (Selman+ 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/443/851https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/443/851http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/443/851https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/443/851https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/443/851http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/443/851GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/443/851/table2 (Observed and physical parameters of stars in 30 Doradus)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/443/851/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/443/851/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/443/851/table2?GETtext/xml+votable180.050000true85.810053-68.9991480.005555555555555556Cone search capability for table J/A+A/443/851/table3 (Spectroscopic and photometric Teff for stars in selected fields)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/443/851/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/443/851/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/443/851/table3?GETtext/xml+votable180.050000true84.675-69.10.0055555555555555566/33094-33095https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/443/851?format=asciiOpticaldefaultJ/A+A/443/851/table2Observed and physical parameters of stars in 30 DoradusrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqStar unique ID in this workmeta.idintprimaryspindicates that the star has spectroscopic data in table3meta.notecharXposX position (0.238 arcsec/pixels)pixpos.cartesian.xfloatYposY position (0.238 arcsec/pixels)pixpos.cartesian.yfloatVmagWFI V band magnitudemagphot.mag;em.opt.Vfloate_VmagThe 1{sigma} uncertainty in Vmagstat.error;phot.mag;em.opt.Vfloat(B-V)WFI (B-V) colour indexmagphot.color;em.opt.B;em.opt.Vfloate_(B-V)The 1{sigma} uncertainty in (B-V)magstat.errorfloat(U-B)WFI (U-B) colour indexmagphot.color;em.opt.U;em.opt.Bfloate_(U-B)The 1{sigma} uncertainty in (U-B)magstat.errorfloatLogTeffLog of the effective temperaturelog(K)phys.temperature.effectivefloatMbolBolometric magnitudemagphot.mag.bolfloatLCLuminosity classsrc.class.luminosityintAgeAgeMyrtime.agedoubleMiniInitial masssolMassphys.massfloatE(B-V)Colour excessmagphot.color.excessfloatUchiDAOPHOT allstar Chi avg. for WFI U bandstat.fit.paramfloatBchiDAOPHOT allstar Chi avg. for WFI B bandstat.fit.paramfloatVchiDAOPHOT allstar Chi avg. for WFI V bandstat.fit.paramfloatsharpDAOPHOT allstar sharp WFI UBV averagestat.fit.paramfloat_RAPosition computed from a comparison with table3 (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from a comparison with table3 (declination part)degpos.eq.dec;meta.mainJ/A+A/443/851/table3Spectroscopic and photometric Teff for stars in selected fieldsSeqSequential numbermeta.idint_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName (1)meta.id;meta.maincharSpTypeMK spectral type (2)src.spTypecharTeffSpectroscopic effective temperatureKphys.temperature.effectivefloatTeff2? Lower limit of Teff when intervalKphys.temperature.effective;stat.minfloatnullableVmagV magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.error;phot.mag;em.opt.Vfloatlog(Teff)phPhotometric effective temperaturelog(K)phys.temperature.effectivefloatchiGoodness of the psf profile fitstat.fit.goodness;instr.det.psffloatSNameSimbad namemeta.idcharSimbadSimbad column added by the CDSchar_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main