J/ApJ/794/36ivo://CDS.VizieR/J/ApJ/794/36doi:10.26093/cds/vizier.17940036CDSHernandez J.Calvet N.Perez A.Briceno C.Olguin L.Contreras M.E.,Hartmann L.Allen L.Espaillat C.Hernan R.2017-06-16T12:33:17Z2017-05-16T06:45:53ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomybroad-band-photometrystellar-spectral-typesline-intensitiesextinctionradial-velocitystellar-distanceWe present a spectroscopic survey of the stellar population of the {sigma} Orionis cluster. We have obtained spectral types for 340 stars. Spectroscopic data for spectral typing come from several spectrographs with similar spectroscopic coverage and resolution. More than half of the stars in our sample are members confirmed by the presence of lithium in absorption, strong H{alpha} in emission or weak gravity-sensitive features. In addition, we have obtained high-resolution (R~34000) spectra in the H{alpha} region for 169 stars in the region. Radial velocities were calculated from this data set. The radial velocity distribution for members of the cluster is in agreement with previous work. Analysis of the profile of the H{alpha} line and infrared observations reveals two binary systems or fast rotators that mimic the H{alpha} width expected in stars with accretion disks. On the other hand, there are stars with optically thick disks and narrow H{alpha} profiles not expected in stars with accretion disks. This contribution constitutes the largest homogeneous spectroscopic data set of the {sigma} Orionis cluster to date.2014ApJ...794...36Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/794/36CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)IX/41 : XMM-Newton Serendipitous Source Catalogue 2XMMi-DR3II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)J/A+A/419/249 : RJHKs photometry of sigma Ori low-mass stars (Scholz+, 2004)J/AJ/128/2316 : BVRIJHKs photometry in sigma Ori cluster (Sherry+, 2004)J/AJ/129/907 : New Ori OB1 members (Briceno+, 2005)J/MNRAS/356/89 : sigma Ori low-mass stars (Kenyon+, 2005)J/MNRAS/356/1583 : RV of Sigma Ori low-mass candidate membersJ/A+A/466/917 : Brightest stars of sigma Orionis cluster (Caballero+, 2007)J/ApJ/662/1067 : Spitzer observations of sigma Orionis (Hernandez+, 2007)J/MNRAS/375/1220 : BVI photometry of young stars in 10 clusters (Mayne+, 2007)J/A+A/478/667 : The Mayrit catalogue (Caballero, 2008)J/A+A/488/167 : Low-mass stars in {sigma} Ori and {lambda} OriJ/A+A/521/A45 : X-ray detections in the {sigma} Ori clusterJ/ApJS/191/389 : Photometric monitoring in {sigma} Ori cluster (Cody+, 2010)J/ApJ/754/30 : VISTA IR photometry of {sigma} Ori clusterhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/794/36https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/794/36http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/794/36https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/794/36https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/794/36http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/794/36GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/794/36/table1 (Compiled membership information of the {sigma} Orionis cluster)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/794/36/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/794/36/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/794/36/table1?GETtext/xml+votable180.050000true84.34608611-2.546276110.005555555555555556Cone search capability for table J/ApJ/794/36/table2 (Photometric candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/794/36/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/794/36/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/794/36/table2?GETtext/xml+votable180.050000true84.29839-2.535780.0055555555555555566/22851 22854 22857 228601.5062136169708525e-19 6.118840631666147e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/794/36?format=asciiInfraredOpticaldefaultJ/ApJ/794/36/table5High resolution analysisDiskDisk type (G1)src.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameHernandez et al. (2007, J/ApJ/662/1067) source identifier (SONNNN, [HHM2007] NNNN in Simbad)meta.id;meta.mainchar2MASS2MASS identifiermeta.idcharRVel? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RVel? Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatnullablef_RVel[0/2]? Flag on RVel (G4)meta.codeintnullableEWLiI? Li I equivalent width; in Angstroms0.1nmspect.line.eqWidth;em.opt.Ifloatnullablee_EWLiI? Uncertainty in EWLiI0.1nmstat.errorfloatnullableW10Ha? H{alpha} Full width at 10% line peakkm/sspect.line.widthfloatnullableAcretor[YN] Acretor flag (2)meta.codecharComAdditional comment(s) (4)meta.noteJ/ApJ/794/36/table10Additional photometric candidates not listed in Table 6, Table 7 and Table 9recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameHernandez et al. (2007, J/ApJ/662/1067) source identifier (SONNNN, [HHM2007] NNNN in Simbad)meta.id;meta.mainchar2MASS2MASS identifiermeta.idcharVmag? The V band magnitudemagphot.mag;em.opt.VfloatnullablePM[0-2] Proper motion flag (G5)meta.codecharDist[0/1] Distance flag (G6)meta.codecharVarVariability reference(s) (G2)meta.bibcharPmemb? Photometric membership probability%statfloatnullableSpTypeSpectral typesrc.spTypecharr_SpTypeReference(s) for SpType (G2)meta.ref;pos.framecharf_SpTypeFlag on SpType (G7)meta.codecharJ/ApJ/794/36/table9Known members compiled in section 2.3 and new disk bearing candidates not listed in Table 6 and Table 7recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameHernandez et al. (2007, J/ApJ/662/1067) source identifier (SONNNN, [HHM2007] NNNN in Simbad)meta.id;meta.mainchar2MASS2MASS identifiermeta.idcharVmag? V band magnitudemagphot.mag;em.opt.VfloatnullableDiskDisk type (G1)src.classcharLiILi I reference (G2)meta.bibcharRVRadial velocity reference (G2)meta.bibcharX-rayX-ray reference (G2)meta.bibcharPM[0-2] Proper motion flag (G5)meta.codecharDist[0/1] Distance flag (G6)meta.codecharVarVariability flag (G2)meta.code;src.varcharPhoPhotometric membership probability%statfloatSpTypeSpectral typesrc.spTypecharr_SpTypeReference for SpType (G2)meta.ref;pos.framecharNotesAdditional note (G7)meta.notecharJ/ApJ/794/36/table1Compiled membership information of the {sigma} Orionis clusterSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameHernandez et al. (2007, J/ApJ/662/1067) source identifier (SONNNN, [HHM2007] NNNN in Simbad)meta.id;meta.maincharf_NameFlag on Name (1)meta.codechar2MASS2MASS identifiermeta.idcharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainDiskDisk type (G1)src.classcharLiILi I reference(s) (G2)meta.bibcharRVRadial velocity reference(s) (G2)meta.bibcharX-rayX-ray observation reference(s) (G2)meta.bibcharJ/ApJ/794/36/table2Photometric candidatesSimbadNameSimbad column added by the CDSmeta.idchare_Rmag? Uncertainty in R magmagstat.error;phot.mag;em.opt.RfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameHernandez et al. (2007, J/ApJ/662/1067) source identifier (SONNNN, [HHM2007] NNNN in Simbad)meta.id;meta.mainchar2MASS2MASS identifiermeta.idcharf_2MASS[3] Flag on 2MASS (1)meta.codecharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainUmag? The U band magnitudemagphot.mag;em.opt.Ufloatnullablee_Umag? Uncertainty in U magmagstat.error;phot.mag;em.opt.UfloatnullableBmag? The B band magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag? Uncertainty in B magmagstat.error;phot.mag;em.opt.BfloatnullableVmagThe V band magnitudemagphot.mag;em.opt.Vfloate_VmagUncertainty in V magmagstat.error;phot.mag;em.opt.VfloatRmag? The R band magnitudemagphot.mag;em.opt.RfloatnullableImag? The I band magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag? Uncertainty in I magmagstat.error;phot.mag;em.opt.IfloatnullableJmag2MASS J band magnitudemagphot.mag;em.IR.Jfloate_JmagUncertainty in J magmagstat.error;phot.mag;em.IR.Jfloatf_Jmag[1] Flag on Jmag (2)meta.codecharRefReference code (3)meta.notecharf_Ref[2] Flag on Ref (4)meta.codecharJ/ApJ/794/36/table4Low resolution analysisSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameHernandez et al. (2007, J/ApJ/662/1067) source identifier (SONNNN, [HHM2007] NNNN in Simbad)meta.id;meta.maincharf_Name[2/3] Flag on Name (1)meta.codechar2MASS2MASS identifiermeta.idcharInstInstrument used (2)instr.setupcharf_Inst[1] Flag on Inst (3)meta.codecharSpTypeNumerical spectral Typesrc.spTypechare_SpTypeUncertainty in SpTypestat.error;src.spTypefloatEWLiILi I equivalent width; in Angstroms0.1nmspect.line.eqWidth;em.opt.Ifloatf_EWLiI[0/2] Flag on EWLiI (G3)meta.codeintEWHa? H{alpha} equivalent width; in Angstroms0.1nmspect.line.eqWidth;em.line.Halphafloatnullablef_EWHaFlag on Ha (5)meta.codecharEWNaI? Na I equivalent width; in Angstroms0.1nmspect.line.eqWidth;em.opt.Ifloatnullablee_EWNaI? Uncertainty in EWNaI0.1nmstat.errorfloatnullablef_EWNaI[YN] Flag on EWNaI (6)meta.codecharAVKH95? Kenyon & Hartmann 1995 (J/ApJS/101/117) V band extinctionmagphys.absorptionfloatnullableAVPM13? Pecaut & Mamajek 2013 (J/ApJS/208/9) V band extinctionmagphys.absorptionfloatnullableJ/ApJ/794/36/table6Membership for stars with spectral typesDist[0-1] Distance flag (G6)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameHernandez et al. (2007, J/ApJ/662/1067) source identifier (SONNNN, [HHM2007] NNNN in Simbad)meta.id;meta.mainchar2MASS2MASS identifiermeta.idcharSpTypeNumerical spectral typesrc.spTypechare_SpTypeUncertainty in SpTypestat.error;src.spTypefloatLiIl[0/2] Li I flag from low resolution spectra (G3)meta.codeintLiIh[0/2]? Li I flag from high resolution spectra (G3)meta.codeintnullabler_LiIhReference code(s) for LiIh (G2)meta.ref;pos.framecharRVel[0-2] Radial velocity flag (G4)meta.codecharr_RVelReference code(s) for RVel (G2)meta.ref;pos.framecharHaH{alpha} from low/high spectra (1)meta.codecharNaI[YN] Na I present?meta.codecharDiskDisk type (G1)src.classcharX-rayX-ray reference(s) (G2)meta.codecharPM[0-2] Proper motion flag (G5)meta.codecharVarVariability reference(s) (G2)meta.codecharPmemb? Photometric membership probability%statfloatnullableAV? V band extinctionmagphys.absorption;em.opt.VfloatnullableMemberMember flag (G8)meta.code.membercharJ/ApJ/794/36/table7Membership for Stars without Spectral Types Studied in Section 3.2DiskDisk type (G1)src.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameHernandez et al. (2007, J/ApJ/662/1067) source identifier (SONNNN, [HHM2007] NNNN in Simbad)meta.id;meta.mainchar2MASS2MASS identifiermeta.idcharLiI[0/2] Li I flag (G3)meta.codeintr_LiILi I reference(s) (G2)meta.ref;pos.framecharRVel[0-2] Radial velocity flag (G4)phys.veloc;pos.heliocentriccharr_RVelRVel reference(s) (1) (G2)meta.ref;pos.framecharHalpha[YN-] H{alpha} flagmeta.code.errorcharX-rayX-ray reference(s) (1) (G2)meta.codecharPM[1-2] Proper motion flag (G5)meta.codecharDist[0-1] Distance flag (G6)meta.codecharVarVariability reference(s) (G2)meta.codecharPmembPhotometry membership probability%statfloatMember[MNPU:] Member flag (G8)meta.code.memberchar