J/A+A/619/A148ivo://CDS.VizieR/J/A+A/619/A148doi:10.26093/cds/vizier.36190148CDSNaze Y.Motch C.2019-01-07T09:29:42Z2018-11-19T08:05:16ZCDS support team

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

cds-question@unistra.frsurveysx-ray-sourceso-starsemission-line-starsWe perform a survey of Oe and Be stars in the X-ray range. To this aim, we cross-correlated XMM-Newton and Chandra catalogs of X-ray sources with a list of Be stars, finding 84 matches in total. Of these, 51 objects had enough counts for a spectral analysis. This paper provides the derived X-ray properties (X-ray luminosities, and whenever possible, hardness ratios, plasma temperatures, and variability assessment) of this largest ever sample of Oe and Be stars. The targets display a wide range in luminosity and hardness. In particular, the significant presence of very bright and hard sources is atypical for X-ray surveys of OB stars. Several types of sources are identified. A subset of stars display the typical characteristics of O-stars, magnetic OB stars, or pre-main-sequence (PMS) objects: their Be nature does not seem to play an important role. However, another subset comprises gamma Cas analogs, which are responsible for the luminous and hard detections. Our sample contains seven known gamma Cas analogs, but we also identify eight new gamma Cas analogs and one gamma Cas candidate. This nearly doubles the sample of such stars.2018A&A...619A.148Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/619/A148CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/506/1055 : Hot stars emitting in X-ray. I. (Naze, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/619/A148https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/619/A148http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/619/A148https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/619/A148https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/619/A148http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/619/A148GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/619/A148/table1 (List of Be stars detected in the X-ray range, ordered by RA.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/A148/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/A148/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/A148/table1?GETtext/xml+votable180.050000true14.177215660.71674030.0055555555555555566/463 1558 3030 3256-3257 3301 3662 5631 12879 14003 14085 14188 14261 14353 14630 14640-14641 14692 15250 15368 15662 15683 16144 19202 20510 21439 21655 22039 22249 22517 22615 22895 23637 23851 28809 28823 28828 28853 28890-28891 28902 28913 29096-29097 29463 30244 30818 33563 34896 37343 37593 37929-37930 38016 38024 39355 41670 41697 41767 42015 42080 42273 42290 42392 42483 43024 43310 43407 43531 44316 44360 46459 48534https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/619/A148?format=asciiX-raydefaultJ/A+A/619/A148/table1List of Be stars detected in the X-ray range, ordered by RA.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqStar indexmeta.idintSNameSimbad star namemeta.id;meta.maincharn_SName[:] Note on SName (1)meta.notecharSXMM3XMM source name (JHHMMSS.s+DDMMSS)meta.idchard3XMM? Distance between XMM and star positions (2)arcsecpos.angDistancefloatnullablevarXMMXMM [y/n] Variability flagmeta.code;src.varcharoidXMMID(s) of the XMM-Newton observationmeta.id;obscharCXOGSGCXOGSG source name (JHHMMSS.s+DDMMSS)meta.idchardCXO? Distance between Chandra and star positions (2)arcsecpos.angDistancefloatnullablevarCXO[y/n] Chandra Variability flagmeta.code;src.varcharoidCXOID(s) of the Chandra observationmeta.id;obscharn_oidCXO[c] Note on oidCXO (3)meta.notecharXMMSL2XMMSL2 source name (JHHMMSS.s+DDMMSS)meta.idchardXMMLS2? Distance between XMMSL2 and star positions (2)arcsecpos.angDistancefloatnullableoidSwiftID(s) of the Swift observationmeta.id;obscharSimbadSimbad column added by the CDSmeta.ref.urlchar_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.mainJ/A+A/619/A148/table2Physical properties of the targetsFlagFlag (3)meta.code.errorcharSNameSimbad star namemeta.id;meta.maincharSpTypeSpectral type (1)src.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqStar indexmeta.idintn_SpType[s] s for Spectral type from Simbadmeta.notecharVmagV band magnitudemagphot.mag;em.opt.VfloatE(B-V)Color excess E(B-V) (2)magphot.color.excessfloatr_E(B-V)? Reference for E(B-V) (3)meta.ref;pos.framechardStar distancepcpos.angDistanceinte_dstandard deviation of dpcstat.errorintr_dOrigin of distance (3)meta.ref;pos.framecharlogLbolLog of bolometric luminositylog(solLum)phys.luminosityfloate_logLbolstandard deviation of logLbollog(solLum)stat.errorfloatlogTeff? Log of effective temperature after de Jager & Nieuwenhuijzen (1987A&A...177..217D)log(K)phys.temperature.effectivefloatnullablevsini? Rotational velocity, mean of values from all quoted referenceskm/sphys.veloc.rotat;stat.meanintnullabler_vsiniOrigin of vsini measurement, in refs.dat filemeta.refcharJ/A+A/619/A148/table3*Results of the spectral fittingSeqStar indexmeta.idintSNameSimbad star namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOID? ID of the X-ray observation (1)meta.idnullableNHismFixed value of the interstellar hydrogen column density (2)1e+22cm**-2phys.columnDensityfloatNHFitted intrinsic hydrogen column density1e+22cm**-2phys.columnDensity;meta.modelledfloate_NH? Standard deviation of NH (4)1e+22cm**-2stat.errorfloatnullablen_NH[f] f for fixedmeta.notecharkT1kT of the first thermal componentkeVphys.temperaturefloate_kT1Standard deviation of kT1 (4)keVstat.errorfloatNorm1Normalization of the first thermal componentcm**-5stat.fit.paramdoublee_Norm1Standard deviation of Norm1 (4)cm**-5stat.errordoublekT2? kT of the second thermal componentkeVphys.temperaturefloatnullablee_kT2? Standard deviation of kT2 (4)keVstat.errorfloatnullableNorm2? Normalization of the second thermal componentcm**-5stat.fit.paramdoublenullablee_Norm2? Standard deviation of Norm2 (4)cm**-5stat.errordoublenullablekT3? kT of the third thermal componentkeVphys.temperaturefloatnullablee_kT3? Standard deviation of kT3 (4)keVstat.errorfloatnullableNorm3? Normalization of the third thermal componentcm**-5stat.fit.paramdoublenullablee_Norm3? Standard deviation of Norm3 (4)cm**-5stat.errordoublenullableChi2Chi2 of best fitstat.fit.chi2;meta.modelledfloatDofDegrees of freedomstat.fit.dofintFXTotObserved X-ray flux (0.5-10KeV) (in erg/s/cm^2^)mW.m**-2phot.flux;em.X-raydoublee_FXTotStandard deviation of FXTot (4)mW.m**-2stat.errordoubleLXTotIsmX-ray luminosity (0.5-10keV) using FX corrected for NHism (in erg/s) (2)1e-07Wphys.luminosity;em.X-raydoublee_LXTotIsmStandard deviation of LxTotIsm (2)(4)(5)1e-07Wstat.errordoublelogLX/LbolLog of Lx/Lbol luminosity ratiophys.luminosity;arith.ratiofloate_logLX/LbolStandard deviation of logLxLbol (4) (5)stat.errorfloatHRFlux hardness ratio (FXhard/FXsoft) (3)phot.flux;arith.ratiofloate_HRStandard deviation of HR (4)stat.errorfloatJ/A+A/619/A148/table4X-ray luminosities in 0.5-10.0keV, corrected for interstellar absorption, for the simple detection cases (see Section 4.1.2 for details)SeqStar indexmeta.idintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNameSimbad star namemeta.id;meta.maincharNHismValue of the interstellar hydrogen column density (1)1e+22cm**-2phys.columnDensityfloatl_LXTotIsmMinLimit flag on LXTotIsmMinmeta.code.errorcharLXTotIsmMinLower bound of X-ray luminosity (0.5-10 keV) using FX corrected for NHism (1)1e-07Wphys.luminosity;em.X-raydoubleLXTotIsmMax? Upper bound of X-ray luminosity (0.5-10 keV) using FX corrected for NHism (1)1e-07Wphys.luminosity;em.X-raydoublenullablee_LXTotIsmMax? Standard deviation of LXTotIsmMax (1) (2)1e-07Wstat.errordoublenullablel_logLX/LbolMinLimit flag on logLxLbolMinmeta.code.errorcharlogLX/LbolMinLower bound of Log of LX/Lbol luminosity ratio (1)phys.luminosity;arith.ratiofloatlogLX/LbolMax? Upper bound of Log of Lx/Lbol luminosity ratio (1)phys.luminosity;arith.ratiofloatnullablee_logLX/LbolMax? Standard deviation of logLx/LbolMax (1) (2)stat.errorfloatnullableJ/A+A/619/A148/table5List of properties of known, new, and candidate {gamma} Cas analogs, along with two other peculiar bright sourcesSNameSimbad star namemeta.id;meta.maincharSpTypeSpectral type (2)src.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCat[KNCO] Category (1)meta.codecharSeqStar indexmeta.idintlogLX/LbolLog of LX/Lbol luminosity ratio or lower value when interval (3)phys.luminosity;arith.ratiofloatlogLX/Lbol2? Upper value of Log of LX/Lbol luminosity ratio when interval (3)phys.luminosity;arith.ratiofloatnullablee_logLX/Lbol? Standard deviation of LogLX/Lbolstat.errorfloatnullableLXTotIsmX-ray luminosity (0.5-10 keV) using Fx corrected for NHism or lower value when interval (3)1e-07Wphys.luminosity;em.X-raydoubleLXTotIsm2? Upper value of X-ray luminosity (0.5-10keV) using Fx corrected for NHism when interval1e-07Wphys.luminosity;em.X-raydoublenullablee_LXTotIsm? Standard deviation of LXTotIsm1e-07Wstat.errordoublenullableLXHardIsm? X-ray luminosity (2-10 keV) using FX corrected for NHism (3)1e-07Wphys.luminosity;em.X-raydoublenullablee_LXHardIsm? Standard deviation of LXHardIsm1e-07Wstat.errordoublenullableHR? Flux hardness ratio (FX hard/FX soft)phot.flux;arith.ratiofloatnullablee_HR? Standard deviation of HR (3)stat.errorfloatnullablekTmin? Lower bound kT of the hottest thermal component (4)keVphys.energy;stat.minintnullablekTmax? Upper bound kT of the hottest thermal component (4)keVphys.energy;stat.maxintnullableVars[y/n] Short variability flag (5)meta.code;src.varcharVarl[y/n] Long variability flag (5)meta.code;src.varcharmEWHa? Minus equivalent width of H{alpha} emission line (6)0.1nmspect.line.eqWidthintnullablevsini? Projectional rotational velocity (2)km/sphys.veloc.rotatintnullableJ/A+A/619/A148/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.notecharBibCodeBicCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar