J/A+A/562/A69ivo://CDS.VizieR/J/A+A/562/A69doi:10.26093/cds/vizier.35620069CDSKaltcheva N.T.Golev V.K.Moran K.2017-11-29T11:48:41Z2014-07-13T11:50:03ZCDS support team

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

cds-question@unistra.frob-starsstellar-distanceThe distribution of OB stars along with that of H{alpha}, ^12^CO, dust infrared emission, and neutral hydrogen is carried out in order to provide a more complete picture of interactions of the young massive stars and the observed supershell GSH 305+01-24. The studied field is located between 299{deg}<= l<= 311{deg} and -5{deg}<=b<=7{deg}. The investigation is based on nearly 700 O-B9 stars with uvby{beta} photometry currently available. The derived stellar physical parameters were used to establish a homogeneous scale for the distances and extinction of light for major apparent groups and layers of foreground and background stars in Centaurus and study the interaction with the surrounding interstellar medium. The distance to the entire Centaurus star-forming complex is revised and a maximum of the OB-star distance distribution is found at 1.8+/-0.4 (r.m.s) kpc. The massive star component of GSH 305+01-24 is identified at about 85-90% completeness up to 11.5-12mag. The projected coincidence of the OB stars with the shell and the similarities between the shell's morphology and the OB-star distribution indicate a strong interaction of the stellar winds with the superbubble material. We demonstrate that these stars contribute a sufficient wind injection energy in order to explain the observed size and expansion velocity of the supershell. The derived stellar ages suggest an age gradient over the Coalsack Loop. A continuous star-formation might be taking place within the shell with the youngest stars located at its periphery and the open cluster NGC 4755 being the oldest. A layer of very young stars at 1kpc is detected and its connection to both GSH 305+01-24 and the foreground GSH 304-00-12 HI shells is investigated.2014A&A...562A..69Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/562/A69CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/215 : uvby-beta Catalogue (Hauck+ 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/562/A69https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/562/A69http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/562/A69https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/562/A69https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/562/A69http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/562/A69GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/562/A69/table1 (*Photometric data and derived stellar parameters for the full sample of young stars with uvby{beta} data in the field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/562/A69/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/562/A69/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/562/A69/table1?GETtext/xml+votable180.050000true185.212734-59.1017150.005555555555555556Cone search capability for table J/A+A/562/A69/table3 (*The photometric data and the derived stellar parameters for young stars located around 1kpc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/562/A69/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/562/A69/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/562/A69/table3?GETtext/xml+votable180.050000true186.649637-63.0990720.0055555555555555564/2689 5/10413 10415 10418 10424 10426 10428 10753 10755 10761 10764 10768 6/41534-41535 41575 41577 41579 41581 41583 41586 41594 41613 41615 41625 41630-41631 41636-41637 41641 41644 41646 41648-41649 41651 41657-41659 41664 41666 41668 41671 41677-41680 41682 41688 41690-41691 41700-41701 41709 41711 41720-41721 43009 43011 43017 43019 43053-43055 43060 43062 43064 43066-43067 43080 43083 43086 43088-43089 43091 43104 43140 43152-43153https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/562/A69?format=asciiOpticaldefaultJ/A+A/562/A69/table1*Photometric data and derived stellar parameters for the full sample of young stars with uvby{beta} data in the fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNSimbad column added by the CDSmeta.ref.urlcharNameSIMBAD identifiermeta.id;meta.maincharLIDLausanne IDentifier (II/215), uvby98 in SIMBADmeta.idlongprimaryGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latVmagV magnitudemagphot.mag;em.opt.Vfloatb-yStroemgren colour index b-ymagphot.color;em.opt.B;em.opt.Vdoublem1Stroemgren colour m1magphot.colordoublec1Stroemgren colour c1magphot.colordoublebetaStroemgren index {beta}magphot.colordoubleSpTypeMK spectral type as in SIMBADsrc.spTypechar(b-y)0Dereddened b-y colour indexmagphot.color;em.opt.B;em.opt.Vdoublec0Dereddened c0 indexmagphot.color.reddFreedoublem0Dereddened m0 indexmagphot.color.reddFreedoubleE(b-y)b-y colour excessmagphot.color.excessdoubleV0magDereddened V magnitudemagphot.mag.reddFree;em.opt.VdoubleVabs? Absolute V magnitudemagphys.magAbs;em.opt.VfloatnullableDM? Distance modulusmagphot.mag.distModfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/A+A/562/A69/table3*The photometric data and the derived stellar parameters for young stars located around 1kpcm0Dereddened m0 indexmagphot.color.reddFreedoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSIMBAD identifiermeta.id;meta.maincharLIDLausanne IDentifier (II/215), uvby98 in SIMBADmeta.idlongGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latVmagV magnitudemagphot.mag;em.opt.Vfloatb-yStroemgren colour index b-ymagphot.color;em.opt.B;em.opt.Vdoublem1Stroemgren colour m1magphot.colordoublec1Stroemgren colour c1magphot.colordoublebetaStroemgren index {beta}magphot.colordoubleSpTypeMK spectral type as in SIMBADsrc.spTypechar(b-y)0Dereddened b-y colour indexmagphot.color;em.opt.B;em.opt.Vdoublec0Dereddened c0 indexmagphot.color.reddFreedoubleE(b-y)b-y colour excessmagphot.color.excessdoubleV0magDereddened V magnitudemagphot.mag.reddFree;em.opt.VdoubleVabs? Absolute V magnitudemagphys.magAbs;em.opt.VfloatnullableDM? Distance modulusmagphot.mag.distModfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexed