J/ApJ/446/622ivo://CDS.VizieR/J/ApJ/446/622doi:10.26093/cds/vizier.14460622CDSHill R.S.Cheng K.-P.Bohlin R.C.OConnell R.W.Roberts M.S.,Smith A.M.Stecher T.P.1997-12-09T19:53:37Z1997-12-09T20:53:29ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsopen-star-clustersA 40' field including the stellar associations LH 52 and LH 53 and the supernova remnant N49 in the Large Magellanic Cloud was observed by the Ultraviolet Imaging Telescope (UIT) during the Astro-1 Space Shuttle mission in 1990 December. The image in the 162 nm bandpass is discussed together with ground-based BV data on subfields containing LH 52 and LH 53. Point-spread function photometry in the 162nm, B, and V bands is presented in the form of color-magnitude diagrams and two-color diagrams, which are compared with stellar models. The far-ultraviolet extinction curve of the dust in LH 52 is unusually steep for the LMC. The most probable age of both associations is ~10 Myr, which constrains the scenario for the evolution of the supergiant Halpha shell LMC 4 by stochastic self-propagated star formation. The initial mass function (IMF) slope for LH 52 is Gamma~-1, in agreement with previous work, and the slope for LH 53, which is less densely populated, is Gamma~-2. A similar relationship between surface density of stars and IMF slope is reported for a UIT field near 30 Dor. The ultraviolet morphology of N49, which is contained in LH 53, is dominated by two bright features that straddle an X-ray bright spot, consistent with an encounter between the blast wave and a cloud. The estimated age of ~10Myr for LH 53 implies an initial mass of ~20M_{sun}_ for the N49 progenitor star.1995ApJ...446..622Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/446/622CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/446/622https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/446/622http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/446/622https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/446/622https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/446/622http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/446/622GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/446/622/table2 (Ultraviolet sources in LH 52)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/446/622/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/446/622/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/446/622/table2?GETtext/xml+votable180.050000true81.348875-66.23008330.005555555555555556Cone search capability for table J/ApJ/446/622/table3 (Ultraviolet sources in LH 53)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/446/622/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/446/622/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/446/622/table3?GETtext/xml+votable180.050000true81.5829167-66.04250.005555555555555556Cone search capability for table J/ApJ/446/622/lh52_bv (BV photometry of LH 52)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/446/622/lh52_bv?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/446/622/lh52_bv?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/446/622/lh52_bv?GETtext/xml+votable180.050000true81.3381667-66.24161110.005555555555555556Cone search capability for table J/ApJ/446/622/lh53_bv (BV photometry of LH 53)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/446/622/lh53_bv?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/446/622/lh53_bv?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/446/622/lh53_bv?GETtext/xml+votable180.050000true81.313375-66.23594440.005555555555555556https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/446/622?format=asciiUVdefaultJ/ApJ/446/622/table2Ultraviolet sources in LH 52m162*Magnitude at 162nmmagphot.mag;em.UV.100-200nmfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID*Identificationmeta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declinatin signpos.eq.dec;meta.mainnullablee_m162DAOPHOT-type internal error in m162magstat.errorfloatBmag? Calibrated B magnitudemagphot.mag;em.opt.Bfloate_Bmag? DAOPHOT-type internal error in Bmagmagstat.errorfloatVmag? Calibrated V magnitudemagphot.mag;em.opt.Vfloate_Vmag? DAOPHOT-type internal error in Vmagstat.errorfloatRemarkRemark on dup. matches or UIT image qualitymeta.notecharJ/ApJ/446/622/table3Ultraviolet sources in LH 53recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID*Identificationmeta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declinatin signpos.eq.dec;meta.mainnullablem162*Magnitude at 162nmmagphot.mag;em.UV.100-200nmfloate_m162DAOPHOT-type internal error in m162magstat.errorfloatBmag? Calibrated B magnitudemagphot.mag;em.opt.Bfloate_Bmag? DAOPHOT-type internal error in Bmagmagstat.errorfloatVmag? Calibrated V magnitudemagphot.mag;em.opt.Vfloate_Vmag? DAOPHOT-type internal error in Vmagstat.errorfloatRemarkRemark on dup. matches or UIT image qualitymeta.notecharJ/ApJ/446/622/lh52_bvBV photometry of LH 52recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification derived from V photometrymeta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination signpos.eq.dec;meta.mainnullableBmagB magnitudemagphot.mag;em.opt.Bfloate_BmagDAOPHOT-like internal errormagstat.errorfloatVmagV magnitudemagphot.mag;em.opt.Vfloate_VmagDAOPHOT-like internal errormagstat.errorfloatJ/ApJ/446/622/lh53_bvBV photometry of LH 53recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification derived from V photometrymeta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination signpos.eq.dec;meta.mainnullableBmagB magnitudemagphot.mag;em.opt.Bfloate_BmagDAOPHOT-like internal errormagstat.errorfloatVmagV magnitudemagphot.mag;em.opt.Vfloate_VmagDAOPHOT-like internal errormagstat.errorfloat