J/AJ/124/404ivo://CDS.VizieR/J/AJ/124/404doi:10.26093/cds/vizier.51240404CDSPreibisch T.Brown A.G.A.Bridges T.Guenther E.Zinnecker H.2023-04-06T16:50:53Z2003-01-04T17:50:31ZCDS support team

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

cds-question@unistra.fropen-star-clusterspre-main-sequence-starsline-intensitiesWe investigate the stellar population and star formation history of the Upper Scorpius OB association, the most nearby region of recent massive star formation, over the full stellar mass range from 0.1 to 20M_{sun}_. The first part of this paper describes an extension of our large spectroscopic survey (Preibisch et al., published in 2001, Cat. <J/AJ/121/1040>) for low-mass pre-main-sequence (PMS) stars in Upper Scorpius. Using the multiobject spectrograph 2dF at the Anglo-Australian Telescope, we obtained spectra of 469 stars with magnitudes R=12.5-18.0 in a 6{deg}^2^ area, on he nights of 2001 May 16-17. Among these, we find 68 new PMS stars, nearly all of them M-type stars, by their strong lithium absorption lines. The total area covered by our 2dF survey is now 9 deg2 and contains 166 new PMS stars. Combining these results with our earlier investigation (Preibisch & Zinnecker, 1999AJ....117.2381P) yields a sample of 250 PMS stars in the mass range ~0.2 to ~2M_{sun}_.2002AJ....124..404Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/124/404CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/333/619 : Upper Scorpius OB association Lithium survey (Preibisch+ 1998)J/AJ/121/1040 : PMS members of upper Scorpius OB association (Preibisch+ 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/124/404https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/124/404http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/124/404https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/124/404https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/124/404http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/124/404GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/124/404/table1 (PMS stars in Upper Scorpius detected in our 2dF survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/124/404/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/124/404/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/124/404/table1?GETtext/xml+votable180.050000true238.885-23.1380560.0055555555555555566/44317 44319 44360 44362 44365-44367 44377-44379 44388-44389 44391 44400-44401 44404https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/124/404?format=asciiOpticaldefaultJ/AJ/124/404/table1PMS stars in Upper Scorpius detected in our 2dF surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[PBB2002]Source name, USco-HHMMSS.s+DDMMSS (1)meta.id;meta.maincharRmagThe R-band magnitudemagphot.mag;em.opt.RfloatEWLiLi (6708 {AA}) Equivalent Width0.1nmspect.line.eqWidthfloatEWHaH{alpha} Equivalent Width0.1nmspect.line.eqWidthfloatSpTypeSpectral typesrc.spTypecharAVThe V-band extinctionmagphys.absorptionfloatlog(T)Log of the adopted effective temperaturelog(K)phys.temperature.effectivefloatlog(Lbol)Log of the bolometric luminositylog(solLum)phys.luminosityfloat_RAPosition derived from Name (right ascension part)degpos.eq.ra;meta.main_DEPosition derived from Name (declination part)degpos.eq.dec;meta.main