J/ApJ/738/137ivo://CDS.VizieR/J/ApJ/738/137doi:10.26093/cds/vizier.17380137CDSGouliermis D.A.Dolphin A.E.Robberto M.Gruendl R.A.Chu Y.-H.,Gennaro M.Henning T.Rosa M.Da Rio N.Brandner W.Romaniello M.,De Marchi G.Panagia N.Zinnecker H.2022-07-29T12:48:08Z2013-02-26T14:25:48ZCDS support team

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

cds-question@unistra.frstellar-associationspre-main-sequence-starshst-photometrymagellanic-cloudsWe present our investigation of pre-main-sequence (PMS) stellar populations in the Large Magellanic Cloud (LMC) from imaging with Hubble Space Telescope Wide-Field Planetary Camera 2. Our targets of interest are four star-forming regions located at the periphery of the super-giant shell LMC 4 (Shapley Constellation III). The PMS stellar content of the regions is revealed through the differential Hess diagrams and the observed color-magnitude diagrams (CMDs). Further statistical analysis of stellar distributions along cross sections of the faint part of the CMDs allowed the quantitative assessment of the PMS stars census, and the isolation of faint PMS stars as the true low-mass stellar members of the regions. These distributions are found to be well represented by a double-Gaussian function, the first component of which represents the main-sequence field stars and the second the native PMS stars of each region. Based on this result, a cluster membership probability was assigned to each PMS star according to its CMD position. The higher extinction in the region LH 88 did not allow the unambiguous identification of its native stellar population. The CMD distributions of the PMS stars with the highest membership probability in the regions LH 60, LH 63, and LH 72 exhibit an extraordinary similarity among the regions, suggesting that these stars share common characteristics, as well as common recent star formation history. Considering that the regions are located at different areas of the edge of LMC 4, this finding suggests that star formation along the super-giant shell may have occurred almost simultaneously.2011ApJ...738..137Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/738/137CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)II/236 : UBVR CCD survey of the Magellanic clouds (Massey+, 2002)J/A+A/542/A66 : YSOs in 9 LMC star forming regions (Carlson+, 2012)J/ApJS/184/172 : High- and intermediate-mass YSOs in the LMC (Gruendl+, 2009)J/AJ/133/44 : NGC 346 HST VI photometry (Sabbi+, 2007)J/AJ/116/1275 : UBV photometry in 5 fields of the LMC (Dolphin+, 1998)J/ApJS/91/583 : MC massive stars IMF. I. (Hill+, 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/738/137https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/738/137http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/738/137https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/738/137https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/738/137http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/738/137GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/738/137/table3 (The multi-band photometric catalog of stars primarily detected in both F555W and F814W filters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/738/137/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/738/137/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/738/137/table3?GETtext/xml+votable180.050000true81.94374861-67.425491390.0055555555555555566/33101 33112-331132.0401237512456292e-19 7.605786964834612e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/738/137?format=asciidefaultJ/ApJ/738/137/table3The multi-band photometric catalog of stars primarily detected in both F555W and F814W filtersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLHStar forming region number (60, 63, 72 or 88)meta.id.parentintprimarySeq[1/12511] Stellar index number (1)meta.idintprimaryRAJ2000[81.7/84.1] Right Ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000[-67.7/-66.4] Declination (J2000)degpos.eq.dec;meta.mainindexedXpixX pixel coordinatepixpos.cartesian.xdoubleYpixY pixel coordinatepixpos.cartesian.ydoubleF300W?=99.999 HST/WFPC2 F300W band magnitude (2)magphot.mag;em.opt.Ufloatnullablee_F300W?=9.999 Uncertainty in F300W (2)magstat.errorfloatnullableF450W?=99.999 HST/WFPC2 F450W band magnitude (2)magphot.mag;em.opt.Bfloatnullablee_F450W?=9.999 Uncertainty in F450W (2)magstat.errorfloatnullableF555W[17.732/26.777] HST/WFPC2 F555W band magnitudemagphot.mag;em.opt.Vfloate_F555WUncertainty in F555Wmagstat.errorfloatF814W[16.732/25.623] HST/WFPC2 F814W band magnitudemagphot.mag;em.opt.Ifloate_F814WUncertainty in F814Wmagstat.errorfloatF656N?=99.999 HST/WFPC2 F656N band magnitude (2)magphot.flux;em.line.Halphafloatnullablee_F656N?=9.999 Uncertainty in F656N (2)magstat.errorfloatnullable