J/MNRAS/372/661ivo://CDS.VizieR/J/MNRAS/372/661doi:10.26093/cds/vizier.73720661CDSSana H.Rauw G.Naze N.Gosset E.Vreux J.-M.2024-07-03T20:14:34Z2007-03-18T16:08:37ZCDS support team

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

cds-question@unistra.fropen-star-clustersastronomical-object-identificationinfrared-photometryvisible-astronomybroad-band-photometryob-starspre-main-sequence-starsx-ray-sourcesIn this second paper of the series, we focus on the X-ray properties of the OB star population of NGC 6231. As a tool for our analysis, we performed a literature-based census of the OB stars in the field of view. More than one hundred objects are found, among which 30% can be associated with an X-ray source. All the O-type stars are detected in the X-ray domain as soft and reasonably strong emitters. [...] Among B-type stars, the detection rate is only about 25% in the sub-type range B0-B4 and remains mostly uniform throughout the different sub-populations while it drops significantly at later sub-types. The associated X-ray spectra are harder than those of O-type stars. Our analysis points towards the emission being rather associated with a physical (in a multiple system) PMS companion. However, we still observe a correlation between the bolometric luminosity of the B stars and the measured X-ray luminosity. [...]2006MNRAS.372..661Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/372/661CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/137/233 : UBVI imaging photometry of NGC 6231 (Baume+, 1999)J/AJ/115/734 : NGC 6231 UBVRI and Halpha photometry (Sung+ 1998)J/A+A/454/1047 : XMM view of NGC 6231 open cluster (Sana+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/372/661https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/372/661http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/372/661https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/372/661https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/372/661http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/372/661GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/372/661/obcensus (Census of OB stars in the XMM-Newton FOV)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/372/661/obcensus?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/372/661/obcensus?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/372/661/obcensus?GETtext/xml+votable180.050000true253.27525-41.88847220.0055555555555555566/423943.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/372/661?format=asciiX-rayOpticalInfrareddefaultJ/MNRAS/372/661/obcensusCensus of OB stars in the XMM-Newton FOVrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHD? HD numbermeta.id;meta.mainintnullableCPD-41d? CPD-41 number (CPD-41 NNNN in Simbad)meta.idintnullablem_CPD-41d[ABps] Multiplicity index on CPD-41meta.code.multipcharSegg? Seggewiss, 1968VeBon..79....1S, number (NGC 6231 NNN in Simbad)meta.idintnullableSBL98? Sung et al., 1998, <J/AJ/115/734> number (Cl* NGC 6231 SBL NNN in Simbad)meta.idintnullablen_SBL98[+?] Source resolved in SBL98 (1)meta.notecharBVF99? Baume et al., 1999, <J/A+AS/137/233> number (Cl* NGC 6231 BVF NNN in Simbad)meta.idintnullablen_BVF99[+] Note on BVF99meta.notecharXspecName of the file with a plot of the X-ray spectrum (in {\bf xatlas} subdirectory)meta.id;meta.filecharXSeq? Internal X-ray ID from PaperImeta.idintnullableu_Segg[?b] Uncertainty flag or multiplicity index for Seggmeta.code.errorcharf_XSeq[r+?] problem with the X-ray determination (2)meta.codecharSSB06? SSB06 number (Sung et al., 2006, in prep.)meta.idintnullableRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatB-VB-V colour indexmagphot.color;em.opt.B;em.opt.VfloatVMAGAbsolute V magnitudemagphys.magAbs;em.opt.VfloatMbolBolometric magnitudemagphot.mag.bolfloatSpTypeSpectral classificationsrc.spTypecharr_SpTypeReference for the spectral classificationmeta.ref;pos.framecharNotesIndividual notes and references (3)meta.notecharJ/MNRAS/372/661/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.notecharBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar