J/ApJS/194/7ivo://CDS.VizieR/J/ApJS/194/7doi:10.26093/cds/vizier.21940007CDSNaze Y.Broos P.S.Oskinova L.Townsley L.K.Cohen D.Corcoran M.F.,Evans N.R.Gagne M.Moffat A.F.J.Pittard J.M.Rauw G.ud-Doula A.,Walborn N.R.2017-12-05T05:10:51Z2011-06-14T12:28:56ZCDS support team

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

cds-question@unistra.frob-starsx-ray-sourcesThe key empirical property of the X-ray emission from O stars is a strong correlation between the bolometric and X-ray luminosities. In the framework of the Chandra Carina Complex Project, 129 O and B stars have been detected as X-ray sources; 78 of those, all with spectral type earlier than B3, have enough counts for at least a rough X-ray spectral characterization. This leads to an estimate of the L_X-L_BOL ratio for an exceptional number of 60 O stars belonging to the same region and triples the number of Carina massive stars studied spectroscopically in X-rays. The derived log(L_X/L_BOL) is 7.26 for single objects, with a dispersion of only 0.21dex. Using the properties of hot massive stars listed in the literature, we compare the X-ray luminosities of different types of objects. In the case of O stars, the L_X-L_BOL ratios are similar for bright and faint objects, as well as for stars of different luminosity classes or spectral types. Binaries appear only slightly harder and slightly more luminous in X-rays than single objects; the differences are not formally significant (at the 1% level), except for the L_X-L_BOL ratio in the medium (1.0-2.5keV) energy band. Weak-wind objects have similar X-ray luminosities but they display slightly softer spectra compared with "normal" O stars with the same bolometric luminosity. Discarding three overluminous objects, we find a very shallow trend of harder emission in brighter objects. The properties of the few B stars bright enough to yield some spectral information appear to be different overall (constant X-ray luminosities, harder spectra), hinting that another mechanism for producing X-rays, besides wind shocks, might be at work. However, it must be stressed that the earliest and X-ray brightest among these few detected objects are similar to the latest O stars, suggesting a possibly smooth transition between the two processes.2011ApJS..194....7Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/194/7CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-)J/ApJS/194/2 : Chandra Carina Complex Project (CCCP) catalog (Broos+, 2011)J/ApJS/194/4 : A Naive Bayes source classifier for X-ray sources (Broos+ 2011)J/ApJS/194/5 : Carina OB stars in the CCCP project (Gagne+, 2011)J/ApJS/194/6 : Candidate X-ray emitting OB stars in Carina (Povich+, 2011)J/ApJS/194/9 : X-ray star clusters in the Carina complex (Feigelson+, 2011)J/ApJS/194/10 : NIR properties of YSO in the CCCP (Preibisch+, 2011)J/ApJS/194/11 : Chandra study of Trumpler 15 in Carina (Wang+, 2011)J/ApJS/194/12 : Trumpler 16 in the CCCP (Wolk+, 2011)J/ApJS/194/14 : A Pan-Carina YSO catalog (Povich+, 2011)J/ApJS/194/15 : CCCP: Carina's diffuse X-ray emission (Townsley+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/194/7https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/194/7http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/194/7https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/194/7https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/194/7http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/194/7GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/194/7/Xob (Best-fit results for hot stars associated with X-ray sources with >50 counts and summary of sources' properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/194/7/Xob?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/194/7/Xob?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/194/7/Xob?GETtext/xml+votable180.050000true160.0517831-59.80282690.005555555555555556Cone search capability for table J/ApJS/194/7/table6 (Properties of the undetected OB stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/194/7/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/194/7/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/194/7/table6?GETtext/xml+votable180.050000true160.1254167-59.94758330.0055555555555555566/37333 37335 37930 38016 38018https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/194/7?format=asciiX-raydefaultJ/ApJS/194/7/XobBest-fit results for hot stars associated with X-ray sources with >50 counts and summary of sources' propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCCCPCCCP catalog (Cat. J/ApJS/194/2) datameta.ref.urlcharCXOGNCCXOGNCJ designation (HHMMSS.ss+DDMMSS.s)meta.id;meta.maincharNct? Net Counts in the 0.5-8keV bandctphot.count;em.X-rayfloatnullableb_Nct? Lower 1-sigma limit for Nct (2)ctphot.count;em.X-ray;stat.minfloatnullableB_Nct? Upper 1-sigma limit for Nct (2)ctphot.count;em.X-ray;stat.maxfloatnullableFlux? Photon flux (G1)ph.cm**-2.s**-1phot.fluxdoublenullablechi2r? Reduced chi^2^stat.fit.chi2floatnullabledof? Degree Of Freedomstat.fit.dofintnullableNH(ISM)? Interstellar hydrogen column density1e+22cm**-2phys.columnDensityfloatnullablelogNH1? Circumstellar Hydrogen column densitylog(cm**-2)phys.columnDensityfloatnullableb_logNH1? Lower 1-sigma limit for logNH1 (2)log(cm**-2)phys.columnDensity;stat.minfloatnullableB_logNH1? Upper 1-sigma limit for logNH1 (2)log(cm**-2)phys.columnDensity;stat.maxfloatnullablekT1? First thermal component kT temperaturekeVphys.temperaturefloatnullableb_kT1? Lower 1-sigma limit for kT1 (2)keVphys.temperature;stat.minfloatnullableB_kT1? Upper 1-sigma limit for kT1 (2)keVphys.temperature;stat.maxfloatnullablelogEM1? First thermal component emission measurephys.emissMeasurefloatnullableb_logEM1? Lower 1-sigma limit for logEM1 (2)meta.notefloatnullableB_logEM1? Upper 1-sigma limit for logEM1 (2)meta.notefloatnullablekT2? Second thermal component kT temperaturekeVphys.temperaturefloatnullableb_kT2? Lower 1-sigma limit for kT2 (2)keVphys.temperature;stat.minfloatnullableB_kT2? Upper 1-sigma limit for kT2 (2)keVphys.temperature;stat.maxfloatnullablelogEM2? Second thermal component emission measurephys.emissMeasurefloatnullableb_logEM2? Lower 1-sigma limit for logEM2 (2)meta.notefloatnullableB_logEM2? Upper 1-sigma limit for logEM2 (2)meta.notefloatnullableFluxT? Total band (0.5-10keV) observed fluxmW.m**-2phot.fluxdoublenullableNameOther namemeta.idcharSpTypeMK spectral typesrc.spTypecharbin?[Y] Binarity statusmeta.codecharlog(Lbol)Bolometric luminositylog(solLum)phys.luminosityfloatlogLxTotal (0.5-10keV) band X-ray luminositylog(1e-07W)phys.luminosity;em.X-rayfloatlogLxSSoft (0.1-1keV) band X-ray luminositylog(1e-07W)phys.luminosity;em.X-rayfloatlogLxMMedium (1-2.5keV) band X-ray luminositylog(1e-07W)phys.luminosity;em.X-rayfloatlogLxHHard (2.5-10keV) band X-ray luminositylog(1e-07W)phys.luminosity;em.X-rayfloatlog(Lx/bol)Total X-ray band to bolometric luminosity ratiophys.luminosity;arith.ratiofloatlog(LxS/bol)Soft X-ray band to bolometric luminosity ratiophys.luminosity;arith.ratiofloatlog(LxM/bol)Medium X-ray band to bolometric luminosity ratiophys.luminosity;arith.ratiofloatlog(LxH/bol)Hard X-ray band to bolometric luminosity ratiophys.luminosity;arith.ratiofloatSimbadSimbad column added by the CDScharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainJ/ApJS/194/7/table5Properties of X-ray sources with <50 countsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCCCPCCCP catalog (Cat. J/ApJS/194/2) datameta.ref.urlcharCXOGNCCXOGNCJ designation (HHMMSS.ss+DDMMSS.s)meta.id;meta.maincharNameOther namemeta.idcharSpTypeMK spectral typesrc.spTypecharbin?[Y] Binarity statusmeta.codecharlogLbolBolometric luminositylog(solLum)phys.luminosityfloatNct? Net counts in the 0.5-8keV bandctphot.count;em.X-rayfloatnullableB_Nct? Upper 68% confidence interval for Nctctstat.fit.paramfloatnullableb_Nct? Lower 68% confidence interval for Nctctstat.fit.paramfloatnullableFlux? Photon flux (net counts divided by the mean effective area and the exposure time)ph.cm**-2.s**-1phot.fluxdoublenullableEmed? Median energy of the recorded countskeVem.energyfloatnullablelogLxAbsorption-corrected total (0.5-10keV) X-ray band luminositylog(1e-07W)phys.luminosity;em.X-rayfloatlog(Lx/bol)Total X-ray band to bolometric luminosity ratiophys.luminosity;arith.ratiofloatSimbadSimbad column added by the CDScharJ/ApJS/194/7/table6Properties of the undetected OB starsNameNamemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSpTypeMK spectral typesrc.spTypecharbin?[Y] Binary statusmeta.codecharlogLbolBolometric luminositylog(solLum)phys.luminosityfloatNct? Upper Limit on net counts in 0.5-8keV bandctphot.count;em.X-rayfloatnullableFlux? Upper Limit on photon flux (G1)ph.cm**-2.s**-1phot.flux;stat.maxdoublenullablelogLx? Upper Limit on absorption-corrected X-ray luminositylog(1e-07W)phys.luminosity;em.X-rayfloatnullablelog(Lx/bol)? Upper Limit on total X-ray band to bolometric luminosity ratiophys.luminosity;arith.ratiofloatnullableSimbadSimbad column added by the CDScharJ/ApJS/194/7/ob78_2Model propertiesFH8? Flux in 0.5-8.0keVmW.m**-2phot.fluxdoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpModelAE XSPEC model namemeta.id;stat.fitcharchi2r? Best-fit reduced chi squaredstat.fit.chi2doublenullablelogNH1Hydrogen column density from XSPEClog(cm**-2)phys.columnDensityfloatb_logNH1? lower 1-sigma bound for NH1log(cm**-2)phys.columnDensity;stat.minfloatnullableB_logNH1? upper 1-sigma bound for NH1log(cm**-2)phys.columnDensity;stat.maxfloatnullablelogNH1_CI? Circumstellar hydrogen column density from XSPEClog(cm**-2)phys.columnDensityfloatnullableE_logNH1_CI? Error on logNH1_CI (upper limit)log(cm**-2)stat.error;stat.maxfloatnullablee_logNH1_CI? Error on logNH1_CI (lower limit)log(cm**-2)stat.errorfloatnullablef_logNH1NH1 flag from XSPECmeta.codecharkT1? First thermal component kT temperature from XSPECkeVphys.temperaturefloatnullableb_kT1? lower 1-sigma bound for kT1keVphys.temperature;stat.minfloatnullableB_kT1? upper 1-sigma bound for kT1keVphys.temperature;stat.maxfloatnullablekT1_CI? Circumstellar first thermal component kT temperature from XSPECkeVphys.temperaturefloatnullableE_kT1_CI? Error on kT1_CI (upper limit)keVstat.error;stat.maxfloatnullablee_kT1_CI? Error on kT1_CI (lower limit)keVstat.errorfloatnullablef_kT1kT1 flags from XSPECmeta.codecharkT2? Second thermal component kT temperature from XSPECkeVphys.temperaturefloatnullableb_kT2? Lower 1-sigma bound for kT2keVphys.temperature;stat.minfloatnullableB_kT2? Upper 1-sigma bound for kT2keVphys.temperature;stat.maxfloatnullablekT2_CI? CI second kT value from XSPECkeVphys.temperaturefloatnullableE_kT2_CI? Error on kT2_CI (upper limit)keVstat.error;stat.maxfloatnullablee_kT2_CI? Error on kT2_CI (lower limit)keVstat.errorfloatnullablef_kT2kT2 flags from XSPECmeta.codecharlogNORM1? First thermal component NORM parameter from XSPEClog(cm**-5)stat.fit.paramfloatnullableb_logNORM1? lower 1-sigma bound for logNORM1log(cm**-5)stat.fit.param;stat.minfloatnullableB_logNORM1? upper 1-sigma bound for logNORM1log(cm**-5)stat.fit.param;stat.maxfloatnullablelogNORM1_CI? Circumstellar first thermal component NORM parameter from XSPEClog(cm**-5)stat.fit.paramfloatnullableE_logNORM1_CI? Error on NORM1_CI (upper limit)log(cm**-5)stat.error;stat.maxfloatnullablee_logNORM1_CI? Error on NORM1_CI (lower limit)log(cm**-5)stat.errorfloatnullablelogEM1_CI? Circumstellar first thermal component emission measure from XSPEClog(cm**-5)phys.emissMeasurefloatnullableE_logEM1_CI? Error on EM1_CI (upper limit)log(cm**-5)stat.error;stat.maxfloatnullablee_logEM1_CI? Error on EM1_CI (lower limit)log(cm**-5)stat.errorfloatnullablef_logNORM1NORM1 flag from XSPECmeta.codecharlogNORM2? Second thermal component NORM parameter from XSPEClog(cm**-5)stat.fit.paramfloatnullableb_logNORM2? Lower 1-sigma bound for logNORM2log(cm**-5)stat.fit.param;stat.minfloatnullableB_logNORM2? Upper 1-sigma bound for logNORM2log(cm**-5)stat.fit.param;stat.maxfloatnullableFC28? Flux in 2.0-8.0keV, NHISM=0mW.m**-2phot.fluxdoublenullablelogNORM2_CI? Circumstellar second thermal component NORM parameter from XSPEClog(cm**-5)stat.fit.paramfloatnullableE_logNORM2_CI? Error on NORM2_CI (upper limit)log(cm**-5)stat.error;stat.maxfloatnullableFCME? Flux in 1.0-2.5keV, NHISM=0mW.m**-2phot.fluxdoublenullablee_logNORM2_CI? Error on NORM2_CI (lower limit)log(cm**-5)stat.errorfloatnullablelogEM2_CI? Circumstellar second thermal component emission measure from XSPEClog(cm**-5)phys.emissMeasurefloatnullableE_logEM2_CI? Error on EM2_CI (upper limit)log(cm**-5)stat.error;stat.maxfloatnullablee_logEM2_CI? Error on EM2_CI (lower limit)log(cm**-5)stat.errorfloatnullablef_logNORM2NORM2 flags from XSPECmeta.codecharFH2? Flux in 0.5-2.0keVmW.m**-2phot.fluxdoublenullableE_FH2? Flux in 0.5-2.0keV, 90% 2-sided limitmW.m**-2stat.error;stat.maxdoublenullablee_FH2? Flux in 0.5-2.0keV, 90% 2-sided limitmW.m**-2stat.errordoublenullableF28? Flux in 2.0-8.0keVmW.m**-2phot.fluxdoublenullableE_F28? Flux in 2.0-8.0keV; 90% 2-sided limitmW.m**-2stat.error;stat.maxdoublenullablee_F28? Flux in 2.0-8.0keV; 90% 2-sided limitmW.m**-2stat.errordoublenullableE_FH8? Flux in 0.5-8.0keV; 90% 2-sided limitmW.m**-2stat.error;stat.maxdoublenullablee_FH8? Flux in 0.5-8.0keV; 90% 2-sided limitmW.m**-2stat.errordoublenullableFSO? Flux in 0.5-1.0keVmW.m**-2phot.fluxdoublenullableE_FSO? Flux in 0.5-1.0keV; 90% 2-sided limitmW.m**-2stat.error;stat.maxdoublenullablee_FSO? Flux in 0.5-1.0keV; 90% 2-sided limitmW.m**-2stat.errordoublenullableFME? Flux in 1.0-2.5keVmW.m**-2phot.fluxdoublenullableE_FME? Flux in 1.0-2.5keV; 90% 2-sided limitmW.m**-2stat.error;stat.maxdoublenullablee_FME? Flux in 1.0-2.5keV; 90% 2-sided limitmW.m**-2stat.errordoublenullableFHA? Flux in 2.5-10.0keVmW.m**-2phot.fluxdoublenullableE_FHA? Flux in 2.5-10.0keV; 90% 2-sided limitmW.m**-2stat.error;stat.maxdoublenullablee_FHA? Flux in 2.5-10.0keV; 90% 2-sided limitmW.m**-2stat.errordoublenullableFTO? Flux in 0.5-10.0keVmW.m**-2phot.fluxdoublenullableE_FTO? Flux in 0.5-10.0keV; 90% 2-sided limitmW.m**-2stat.error;stat.maxdoublenullablee_FTO? Flux in 0.5-10.0keV; 90% 2-sided limitmW.m**-2stat.errordoublenullableF1H2? Flux in 0.5-2.0keV, norm2=0mW.m**-2phot.fluxdoublenullableF128? Flux in 2.0-8.0keV, norm2=0mW.m**-2phot.fluxdoublenullableF1H8? Flux in 0.5-8.0keV, norm2=0mW.m**-2phot.fluxdoublenullableF1SO? Flux in 0.5-1.0keV, norm2=0mW.m**-2phot.fluxdoublenullableF1ME? Flux in 1.0-2.5keV, norm2=0mW.m**-2phot.fluxdoublenullableF1HA? Flux in 2.5-10.0keV, norm2=0mW.m**-2phot.fluxdoublenullableF1TO? Flux in 0.5-10.0keV, norm2=0mW.m**-2phot.fluxdoublenullableF1CH2? Flux in 0.5-2.0keV, norm2=0,NHISM=0mW.m**-2phot.fluxdoublenullableF1C28? Flux in 2.0-8.0keV, norm2=0,NHISM=0mW.m**-2phot.fluxdoublenullableF1CH8? Flux in 0.5-8.0keV, norm2=0,NHISM=0mW.m**-2phot.fluxdoublenullableF1CSO? Flux in 0.5-1.0keV, norm2=0,NHISM=0mW.m**-2phot.fluxdoublenullableF1CME? Flux in 1.0-2.5keV, norm2=0,NHISM=0mW.m**-2phot.fluxdoublenullableF1CHA? Flux in 2.5-10.0keV, norm2=0,NHISM=0mW.m**-2phot.fluxdoublenullableF1CTO? Flux in 0.5-10.0keV, norm2=0,NHISM=0mW.m**-2phot.fluxdoublenullableF2H2? Flux in 0.5-2.0keV, norm1=0mW.m**-2phot.fluxdoublenullableF228? Flux in 2.0-8.0keV, norm1=0mW.m**-2phot.fluxdoublenullableF2H8? Flux in 0.5-8.0keV, norm1=0mW.m**-2phot.fluxdoublenullableF2SO? Flux in 0.5-1.0keV, norm1=0mW.m**-2phot.fluxdoublenullableF2ME? Flux in 1.0-2.5keV, norm1=0mW.m**-2phot.fluxdoublenullableF2HA? Flux in 2.5-10.0keV, norm1=0mW.m**-2phot.fluxdoublenullableF2TO? Flux in 0.5-10.0keV, norm1=0mW.m**-2phot.fluxdoublenullableF2CH2? Flux in 0.5-2.0keV, norm1=0,NHISM=0mW.m**-2phot.fluxdoublenullableF2C28? Flux in 2.0-8.0keV, norm1=0,NHISM=0mW.m**-2phot.fluxdoublenullableF2CH8? Flux in 0.5-8.0keV, norm1=0,NHISM=0mW.m**-2phot.fluxdoublenullableF2CSO? Flux in 0.5-1.0keV, norm1=0,NHISM=0mW.m**-2phot.fluxdoublenullableF2CME? Flux in 1.0-2.5keV, norm1=0,NHISM=0mW.m**-2phot.fluxdoublenullableF2CHA? Flux in 2.5-10.0keV, norm1=0,NHISM=0mW.m**-2phot.fluxdoublenullableF2CTO? Flux in 0.5-10.0keV, norm1=0,NHISM=0mW.m**-2phot.fluxdoublenullableFCH2? Flux in 0.5-2.0keV, NHISM=0mW.m**-2phot.fluxdoublenullableFCH8? Flux in 0.5-8.0keV, NHISM=0mW.m**-2phot.fluxdoublenullableFCSO? Flux in 0.5-1.0keV, NHISM=0mW.m**-2phot.fluxdoublenullableFCHA? Flux in 2.5-10.0keV, NHISM=0mW.m**-2phot.fluxdoublenullableFCTO? Flux in 0.5-10.0keV, NHISM=0mW.m**-2phot.fluxdoublenullable