J/MNRAS/331/474ivo://CDS.VizieR/J/MNRAS/331/474doi:10.26093/cds/vizier.73310474CDSFranco G.A.P.2024-06-27T20:18:08Z2006-03-21T22:08:51ZCDS support team

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

cds-question@unistra.frmolecular-cloudsvisible-astronomymedium-band-photometryStroemgren uvby{beta} photometry observations obtained for 205 stars in the general direction of a void in the IRAS 100-{mu}m emission from the Lupus dark cloud complex are presented and analysed. The colour excess versus distance diagram confirms the existence of a region depleted from interstellar material, which is also seen in the ROSAT soft X-ray background emission map. The distance to the surrounding material is estimated as being within the interval from 60 to 100pc. This result is in disagreement with previous distance estimates to the supposed supernova that has been suggested as responsible for clearing the region from dust. As an alternative, the data presented support the suggestion that the void may have been produced by the detachment of material from the interface between LoopI and the Local Bubble as a consequence of hydromagnetic instabilities. Moreover, the distribution of colour excess as a function of distance supports a value of ~150pc as the most probable distance to the dark cloud known as Lupus1.2002MNRAS.331..474Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/331/474CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/320/185 : UBVRIcJHKL photometry in Lup (Wichmann+ 1997)I/131 : SAO Star Catalog J2000 (SAO Staff 1966; USNO, ADC 1990)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/331/474https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/331/474http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/331/474https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/331/474https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/331/474http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/331/474GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/331/474/table1 (Stroemgren photometry of stars earlier than G0 towards Lupus (SAO stars))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/331/474/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/331/474/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/331/474/table1?GETtext/xml+votable180.050000true231.5093844-30.10411420.005555555555555556Cone search capability for table J/MNRAS/331/474/table1b (Stroemgren photometry of stars earlier than G0 towards Lupus (SA stars))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/331/474/table1b?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/331/474/table1b?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/331/474/table1b?GETtext/xml+votable180.050000true233.4959167-31.63873890.0055555555555555565/10679 10684-10685 10687 10728 10730-10731 11025 11029-11030 6/42707 42709-42711 42713-42715 42725 42727 42729-42732 42734-42735 42745-42747 42882 42888 42890-42891 42916 42918-42919 44109 44111-44114 44124-44126 44288-44290 44292 442963.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/331/474?format=asciiOpticaldefaultJ/MNRAS/331/474/table1Stroemgren photometry of stars earlier than G0 towards Lupus (SAO stars)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSAOSAO (<I/131>) Catalog numbermeta.id;meta.mainintHD? HD (<III/135>) numbermeta.idintnullableSpTypeMK spectral typesrc.spTypecharVmagJohnson computed V magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmmagstat.error;phot.mag;em.opt.Vintb-yb-y Stroemgren colour indexmagphot.color;em.opt.B;em.opt.Vfloate_b-yrms uncertainty on b-ymmagstat.error;phot.color;em.opt.Bintm1m_1_ Stroemgren colour indexmagphot.colorfloate_m1rms uncertainty on m1mmagstat.errorintc1c_1_ Stroemgren colour indexmagphot.colorfloate_c1rms uncertainty on c1mmagstat.errorinto_b-yNumber of nights in which the star was observed in uvbymeta.numberintbeta? H{beta} Stroemgren indexmagphot.color;em.opt.B;em.line.Hbetafloatnullablee_beta? rms uncertainty on betammagstat.errorintnullableo_betaNumber of nights in which the star was observed in Hbetameta.numberintSimbadSimbad column added by the CDSmeta.refchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainRA1950Right ascension (1950)pos.eq.raDE1950Declination (1950)pos.eq.decJ/MNRAS/331/474/table1bStroemgren photometry of stars earlier than G0 towards Lupus (SA stars)VmagJohnson computed V magnitudemagphot.mag;em.opt.VfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSASA namemeta.id;meta.mainchare_Vmagrms uncertainty on Vmagmmagstat.error;phot.mag;em.opt.Vintb-yb-y Stroemgren colour indexmagphot.color;em.opt.B;em.opt.Vfloate_b-yrms uncertainty on b-ymmagstat.error;phot.color;em.opt.Bintm1m_1_ Stroemgren colour indexmagphot.colorfloate_m1rms uncertainty on m1mmagstat.errorintc1c_1_ Stroemgren colour indexmagphot.colorfloate_c1rms uncertainty on c1mmagstat.errorinto_b-yNumber of nights in which the star was observed in uvbymeta.numberintbeta? Stroemgren H{beta} indexmagphot.color;em.opt.B;em.line.Hbetafloatnullablee_beta? rms uncertainty on Hbetammagstat.errorintnullableo_betaNumber of nights in which the star was observed in Hbetameta.numberintSimbadSimbad column added by the CDSmeta.refchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainRA1900Right ascension (1900)pos.eq.raDE1900Declination (1900)pos.eq.dec