J/AJ/134/1570ivo://CDS.VizieR/J/AJ/134/1570doi:10.26093/cds/vizier.51341570CDSDaflon S.Cunha K.De Araujo F.X.Wolff S.Przybilla N.2017-12-22T05:33:40Z2010-01-27T11:59:55ZCDS support team

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

cds-question@unistra.frstellar-associationsob-starsWe derive projected rotational velocities (vsini) for a sample of 156 Galactic OB star members of 35 clusters, HII regions, and associations. The HeI lines at 4026, 4388, and 4471{AA} were analyzed in order to define a calibration of the synthetic HeI full widths at half-maximum (FWHMs) versus stellar vsini. A grid of synthetic spectra of HeI line profiles was calculated in non-LTE using an extensive helium model atom and updated atomic data. The vsini values for all stars were derived using the HeI FWHM calibrations, but also, for those target stars with relatively sharp lines, vsini values were obtained from best-fit synthetic spectra of up to 40 lines of CII, NII, OII, AlIII, MgII, SiIII, and SIII. This calibration is a useful and efficient tool for estimating the projected rotational velocities of O9-B5 main-sequence stars. The distribution of vsini for an unbiased sample of early B stars in the unbound association Cep OB2 is consistent with the distribution reported elsewhere for other unbound associations.2007AJ....134.1570Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/134/1570CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/284/265 : Rotational velocities of 373 OB stars (Howarth+ 1997)J/A+A/457/265 : The VLT-FLAMES survey of massive stars (Dufton+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/134/1570https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/134/1570http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/134/1570https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/134/1570https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/134/1570http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/134/1570GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/134/1570/table1 (vsin(i) Results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/134/1570/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/134/1570/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/134/1570/table1?GETtext/xml+votable180.050000true248.6751719-49.85306690.0055555555555555565/3869 3915 6/1285 1287 13557 13559 13722 13745 13748 13999 14146 14353 14355 14356 14628 14630 14631 14636 15368 15369 15376 15392 15406 15452 15455 15484 15572 15573 15574 15580 15638 15656 15657 15658 15670 15686 15689 15744 15748 15750 20849 21517 21518 21519 22022 22115 22208 22246 22249 22253 22264 23962 24325 24344 28803 28828 28892 28894 29118 29166 29182 29463 29513 29527 29534 29535 30211 30217 37891 37895 37897 37900 37901 37907 37910 37923 39711 39733 39754 39778 41698 41758 42155 42169 42202 42203 42209 42370 42383 42394 42516 43033https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/134/1570?format=asciiOpticaldefaultJ/AJ/134/1570/table1vsin(i) ResultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCNameCluster namemeta.id.parentcharSNameStar namemeta.id;meta.maincharn_SNameRemark on binarity (1)meta.notecharTeffEffective temperatureKphys.temperature.effectiveintu_TeffUncertainty flag on Teffmeta.code.error;phys.temperature.effectivecharf_Teff[1]? Assumed Teff=30000K to calculate vsin(i)meta.codechar<vsini>? Mean vsin(i) velocity from weak metal lineskm/sphys.veloc.rotatintnullablee_<vsini>? Uncertainty in <vsiniM>km/sstat.error;phys.veloc.rotatintnullableW4026? The He I (4026) FWHMspect.line.widthfloatnullableu_W4026? Uncertainty flag on W4026meta.code.errorcharvsini4026? The He I (4026) vsin(i)km/sphys.veloc.rotatintnullableW4387? The He I (4387) FWHMspect.line.widthfloatnullableu_W4387? Uncertainty flag on W4387meta.code.errorcharvsini4387? The He I (4387) vsin(i)km/sphys.veloc.rotatintnullableW4471? The He I (4471) FWHMspect.line.widthfloatnullableu_W4471? Uncertainty flag on W4471meta.code.errorcharvsini4471? The He I (4477) vsin(i)km/sphys.veloc.rotatintnullable<vsiniHe>Mean He I derived vsin(i)km/sphys.veloc.rotatinte_<vsiniHe>? Uncertainty in <vsiniHe>km/sstat.errorintnullableSimbadNameSimbad column added by the CDSmeta.idchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullable