J/AJ/108/1256ivo://CDS.VizieR/J/AJ/108/1256doi:10.26093/cds/vizier.51081256CDSGarmany C.D.Massey P.Parker J.W.2023-04-06T16:50:08Z2005-09-08T15:31:35ZCDS support team

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

cds-question@unistra.frstellar-associationsccd-photometryWe present CCD photometry and spectroscopy for stars in Lucke-Hodge 58, an isolated OB association in the Large Magellanic Cloud (LMC) northwest of 30 Doradus. The photometric catalog contains 839 stars with UBV magnitudes complete to V~19. We have obtained spectra and classified 35 stars; combined with previous published spectral types, we find 22 O-type stars. The earliest type is O3-4 V, and there are three WR stars in the association. The slope of the initial mass function, Gamma=-1.7+/-0.3, is in good agreement with other LMC associations. The presence of several evolved supergiants with masses about 15-25M_{sun}_ suggests that some star formation took place as early as 10 million years ago, but the majority of stars formed coevally within the past few million years. Addresses: Garmany C.D. garmany@jila.colorado.edu Joint Institute for Laboratory Astrophysics, Box 440 University of Colorado, Boulder, Colorado 80309-0389 Massey P. massey@noao.edu Kitt Peak National Observatory, National Optical Astronomy Observatories, P.O. Box 26732, Tucson, Arizona 85726-6732 Parker J.W. joel@hrssun.gsfc.nasa.gov Laboratory for Astrophysics and Space Astronomy, Code 681, Goddard Space Flight Center - NASA, Greenbelt, Maryland 207711994AJ....108.1256Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/108/1256CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/108/1256https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/108/1256http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/108/1256https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/108/1256https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/108/1256http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/108/1256GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/108/1256/table3 (UBV photometry of stars in LH 58)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/108/1256/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/108/1256/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/108/1256/table3?GETtext/xml+votable180.050000true81.5615261-68.83386170.005555555555555556Cone search capability for table J/AJ/108/1256/posmk (*Position and MK types of selected stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/108/1256/posmk?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/108/1256/posmk?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/108/1256/posmk?GETtext/xml+votable180.050000true81.5625-68.84030560.0055555555555555566/33100https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/108/1256?format=asciiOpticaldefaultJ/AJ/108/1256/table3UBV photometry of stars in LH 58recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar number, in increasing RA orderintprimaryMKindicates that the star has a MK spectral type in posmkcharXposX CCD coordinatepixfloatYposY CCD coordinatepixfloatVmagV magnitudemagfloatu_Vmag[: ] Uncertainty flag for V (1)charB-VB-V colormagfloatu_B-V[: ] Uncertainty flag for B-V (1)charU-BU-B colormagfloatu_U-B[: ] Uncertainty flag for U-B (1)char_RAPositions from Xpos and Ypos, using standard stars of file posmk.dat (right ascension part)degpos.eq.ra;meta.main_DEPositions from Xpos and Ypos, using standard stars of file posmk.dat (declination part)degpos.eq.dec;meta.mainJ/AJ/108/1256/posmk*Position and MK types of selected starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar number, as in table3.datintRAJ2000Right Ascension J2000pos.eq.ra;meta.mainDEJ2000Declination J2000pos.eq.dec;meta.mainrefPos[UM] Reference of position: U=UCAC2 (Cat. I/289), M=2MASS (Cat. II/246)charVmagV magnitude, as in tabe3.datmagfloatSpTypeMK Spectral type (from Table 4 of paper)char