J/ApJS/260/35ivo://CDS.VizieR/J/ApJS/260/35doi:10.26093/cds/vizier.22600035CDSWang L.Li J.Wu Y.Gies D.R.Liu J.Z.Liu C.Guo Y.Chen X.Han Z.2022-09-14T06:02:52Z2022-09-08T12:25:31ZCDS support team

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

cds-question@unistra.frbe-starsvisible-astronomyspectroscopysurveysstellar-spectral-typesinfrared-photometryproper-motionsopen-star-clustersBe stars are B-type main-sequence stars that display broad Balmer emission lines in their spectra. Identification of the Be population is essential to further examine the formation and evolutionary models. We report the detection of classical Be (CBe) stars from observations with the Large sky Area Multi- Object fiber Spectroscopic Telescope Medium Resolution Survey Data Release 7 (LAMOST MRS DR7). We used a deep convolutional neural network, ResNet, with an 18 layer module to examine the morphology of the H{alpha} profile. We identified 1162 candidate Be stars from the collection of 2,260,387 spectra for 789,918 stars in the database. The ResNet network achieves a Be-star classification accuracy of 99.5%. Among the detections, 151 of these are prior known Be stars crossmatched from the literature. By applying a three-step test, we identified 183 new CBe stars. We find that 41 CBe stars are members of known open clusters. Based on an investigation of the kinematics of the identified CBe stars from the Gaia EDR3 astrometric solutions, we identified 16 new runaways. These new identifications will provide a reference for future follow-ups to further investigate their physical properties.2022ApJS..260...35Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/260/35CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/mk : Catalogue of Stellar Spectral Classifications (Skiff, 2009- )II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/328 : AllWISE Data Release (Cutri+ 2013)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)V/125 : Photometry and Spectroscopy for Luminous Stars (Reed 2005)V/156 : LAMOST DR7 catalogs (Luo+, 2019)J/ApJS/94/687 : Old stellar populations. V. (Worthey+, 1994)J/A+A/331/949 : Wolf-Rayet and O-star runaways kinematics (Moffat+ 1998)J/AJ/126/2971 : UBVRI photometry of 131 Herbig Ae/Be (Vieira+, 2003)J/MNRAS/360/974 : Proper motionsof pulsars (Hobbs+, 2005)J/A+A/461/631 : Counterparts to massive X-ray binaries (Negueruela+, 2007)J/ApJ/686/1280 : Discovery of hot subdwarf comp. to FY CMa (Peters+, 2008)J/MNRAS/384/1277 : H{alpha} emission line sources from IPHAS (Witham+, 2008)J/MNRAS/410/190 : Young runaway stars within 3kpc (Tetzlaff+, 2011)J/other/RAA/11.924 : Atmospheric parameters for 771 stars (Wu+, 2011)J/AJ/144/158 : B and Be stars in h and {chi} Persei (Marsh+, 2012)J/ApJ/765/2 : FUV radial velocities of 59 Cyg (Peters+, 2013)J/AJ/149/7 : SDSS-III/APOGEE. I. Be stars (Chojnowski+, 2015)J/other/RAA/15.1325 : Be stars in LAMOST DR1 (Lin+, 2015)J/MNRAS/463/1162 : Infrared photometry of Be stars (Chen+, 2016)J/A+A/591/A140 : IPHAS-selected classical Be stars (Gkouvelis+, 2016)J/ApJ/828/47 : Radial velocities of the Be star HR 2142 (Peters+, 2016)J/MNRAS/465/1807 : Deep OB star population in Carina (Mohr-Smith+, 2017)J/A+A/618/A93 : Gaia DR2 open clusters in the MW (Cantat-Gaudin+, 2018)J/A+A/638/A21 : Herbig Ae/Be & classical Be stars catalog (Vioque+, 2020)J/MNRAS/504/356 : Updated parameters of 1743 open clusters (Dias+, 2021)J/ApJ/909/149 : Be star omega CMa V LC & polarimetry (Ghoreyshi+, 2021)J/ApJS/253/54 : Galactic O-type stars from LAMOST spectra (Li, 2021)J/MNRAS/503/3279 : GALAH survey: Gal. disc with open clusters (Spina+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/260/35https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/260/35http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/260/35https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/260/35https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/260/35http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/260/35GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/260/35/table2 (Be candidate spectra selected for the training sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/260/35/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/260/35/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/260/35/table2?GETtext/xml+votable180.050000true0.016163.90820.005555555555555556Cone search capability for table J/ApJS/260/35/table3 (Non-Be candidate spectra selected for the training sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/260/35/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/260/35/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/260/35/table3?GETtext/xml+votable180.050000true4.350759.02030.005555555555555556Cone search capability for table J/ApJS/260/35/table5 (Oe stars found from the LAMOST MRS DR7 sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/260/35/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/260/35/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/260/35/table5?GETtext/xml+votable180.050000true1.174561.49880.005555555555555556Cone search capability for table J/ApJS/260/35/table6 (Known Be stars found from the MRS sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/260/35/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/260/35/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/260/35/table6?GETtext/xml+votable180.050000true0.352963.50440.005555555555555556Cone search capability for table J/ApJS/260/35/table7 (Newly identified classical Be (CBe) stars from the LAMOST MRS DR7 sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/260/35/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/260/35/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/260/35/table7?GETtext/xml+votable180.050000true0.016163.90830.005555555555555556Cone search capability for table J/ApJS/260/35/table8 (Open cluster memberships for identified CBe stars from the LAMOST MRS DR7 sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/260/35/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/260/35/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/260/35/table8?GETtext/xml+votable180.050000true18.850041758.51902780.005555555555555556Cone search capability for table J/ApJS/260/35/table9 (The peculiar velocities of the 16 runaway CBe stars identified from the LAMOST MRS DR7 sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/260/35/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/260/35/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/260/35/table9?GETtext/xml+votable180.050000true52.09262545.13222220.005555555555555556Cone search capability for table J/ApJS/260/35/tablea1 (Candidate Be stars displaying Ha emission profiles with absorption shell line identified from the LAMOST MRS DR7 sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/260/35/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/260/35/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/260/35/tablea1?GETtext/xml+votable180.050000true0.106862.66280.005555555555555556Cone search capability for table J/ApJS/260/35/tablea2 (Candidate Be stars displaying Ha absorption profiles with shell line identified from the LAMOST MRS DR7 sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/260/35/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/260/35/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/260/35/tablea2?GETtext/xml+votable180.050000true0.087855.4570.0055555555555555565/443 488 733 735 783-784 794 811 813-816 821 897 900-901 904 3575 3908 5563 6081 6083-6084 6116 6/212 405 451 463-464 466 474 476 858 989 1021 1077 1127 1144 1166-1167 1170 1293 1297-1302 1305 1307-1308 1334-1335 1337 1340 1344 1359 1381 1388 1392 1409 1411 1418-1422 1432-1433 1435 1447 1452 1455-1457 1459 1463-1464 1467-1470 1545 1621 1630 1661 1663 1706 1711 1714-1715 1717-1718 1730 1737 1744 1751-1752 1756 1758 1771 1780-1781 1791 1794 1797 1800 1810 1832 1844 1920 1923 1928-1930 1935 1959 1963 1966 1976-1977 2464 2525 2544 2550 2590 2626 2823 2829 2903 2905-2906 2909 2911 2928-2930 2937-2939 2987-2988 2990 3003 3005 3023 3025-3028 3030-3034 3040 3042-3046 3048 3051 3054-3056 3066 3088 3101 3122 3127 3131 3142-3143 3146 3148 3152 3159 3168-3169 3171 3180 3182 3189 3191 3193 3197-3199 3202 3206 3216-3217 3221-3223 3225 3230 3237 3239 3249-3251 3270 3272 3274 3281 3297-3298 3300-3301 3306 3308 3310 3312-3313 3328-3330 3334 3337 3360-3362 3368 3374 3456-3457 3470 3490 3496 3584 3587 3592-3594 3597-3599 3608 3622 3624-3626 3664 3667 3673 3713 6758 6991 7437 9477 11440 13903 14083 14091 14112 14146-14147 14154 14173 14178 14191 14193-14196 14198 14203-14204 14219 14240 14243-14244 14252-14253 14255 14258-14259 14264 14266 14293-14295 14297 14299 14320-14321 14323-14326 14329 14645 14647 14666 14671 14680 14689 14692-14693 14923 15399 15405 15416-15417 15467 15617 15620-15622 18045 18352 19741 22059 22061 22093 22108 22117 22121 22171 22174 22195 22197 22207 22219 22222-22223 22240 22243-22244 22246 22264 22266 22271 22375 23632-23633 23645 23663 23674 23760-23761 23766 23777 23782 23811 23907 23912 23941 23943 23949-23951 23958 23962-23964 23973 23983 23988 23993 23995 23998 24241 24247 24265 24274 24291 24311 24344-24346 24348-24349 24351 24368-24369 24376 24379-24382 24384-24385 24387 24409 24424 24426 24452 24454-24457 24459-24460 24462 24468-24470 24472 24476 24504 24506-24507 24510 24513-24514 24519 24530-24532 24534 30211 30215 30217-30218 30222-30223 30232-30233 30240-30241 30243-30245 30247 30256 302585.3455714667354156e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/260/35?format=asciiOpticalInfrareddefaultJ/ApJS/260/35/table2Be candidate spectra selected for the training samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsID[589703181/719603123] LAMOST spectrum OBSIDmeta.id;obslongRAJ2000[0.016/113.4] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[3.6/66.4] Declination (J2000)degpos.eq.dec;meta.mainMJD[58025.15/58507.81] Observational datedtime.epochdoubleS/N[47/539] S/N of the spectrumstat.snrintAllDisplay all the information from this catalog for this source (link to Tables 2, 3, 5-9, A1 and A2)meta.ref.urlcharJ/ApJS/260/35/table3Non-Be candidate spectra selected for the training samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsID[589703181/719603123] LAMOST spectrum OBSIDmeta.id;obslongRAJ2000[0.016/113.4] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[3.6/66.4] Declination (J2000)degpos.eq.dec;meta.mainMJD[58025.15/58507.81] Observational datedtime.epochdoubleS/N[47/539] S/N of the spectrumstat.snrintAllDisplay all the information from this catalog for this source (link to Tables 2, 3, 5-9, A1 and A2)meta.ref.urlcharJ/ApJS/260/35/table5Oe stars found from the LAMOST MRS DR7 sampler_SpType[1/85]? Reference for SpType (see refs.dat file)meta.ref;pos.frameintnullableAllDisplay all the information from this catalog for this source (link to Tables 2, 3, 5-9, A1 and A2)meta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLAMOSTLAMOST designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharNameCommon star identifiermeta.idcharRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-5.5/63.6] Declination (J2000)degpos.eq.dec;meta.mainSpTypeSpectral typesrc.spTypecharJ/ApJS/260/35/table6Known Be stars found from the MRS samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLAMOSTLAMOST designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharNameCommon star identifiermeta.idcharRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-5.5/63.6] Declination (J2000)degpos.eq.dec;meta.mainSpTypeSpectral typesrc.spTypecharr_SpType[1/85]? Reference for SpType (see refs.dat file)meta.ref;pos.frameintnullableAllDisplay all the information from this catalog for this source (link to Tables 2, 3, 5-9, A1 and A2)meta.ref.urlcharJ/ApJS/260/35/table7Newly identified classical Be (CBe) stars from the LAMOST MRS DR7 samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLAMOSTLAMOST designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharNameStar namemeta.idcharRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-6.3/64] Declination (J2000)degpos.eq.dec;meta.mainSpTypeSpectral typesrc.spTypecharr_SpType[1/65] Reference for SpType (see refs.dat file)meta.ref;pos.frameintJmag[7.15/12.46] AllWISE apparent J magnitudemagphot.mag;em.IR.Jfloate_Jmag[0.017/0.05] Uncertainty in Jmagmagstat.error;phot.magfloatHmag[6.76/12.34] AllWISE apparent H magnitudemagphot.mag;em.IR.Hfloate_Hmag[0.014/0.07] Uncertainty in H magmagstat.error;phot.magfloatKmag[6.54/12.22] AllWISE apparent K magnitudemagphot.mag;em.IR.Kfloate_Kmag[0.013/0.05] Uncertainty in Kmagmagstat.error;phot.magfloatW1mag[6.36/12.04] AllWISE W1 magnitudemagphot.mag;em.IR.3-4umfloate_W1mag[0.02/0.14] Uncertainty in W1magmagstat.error;phot.magfloatE(B-V)[0.02/2.3] Reddeningmagphot.color.excessfloatAllDisplay all the information from this catalog for this source (link to Tables 2, 3, 5-9, A1 and A2)meta.ref.urlcharWISEADisplay data from AllWISE (II/328) within 3"meta.ref.urlcharJ/ApJS/260/35/table8Open cluster memberships for identified CBe stars from the LAMOST MRS DR7 sampleSimbadNameSimbad column added by the CDSmeta.idcharnullablee_Dist[7/290] Uncertainty in Distpcstat.errorintlogAge[7/8.83] log of cluster age (1)yrtime.agefloate_logAge[0.02/0.65] Uncertainty in Ageyrstat.error;time.agefloat[Fe/H][-0.22/0.3] Cluster metallicity (1)phys.abund.ZfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLAMOSTLAMOST designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharClusterCluster name (1)meta.id.parentcharRV[-84.3/92.3]? Cluster radial velocity, V_r_ (1)km/sphys.veloc;pos.heliocentricfloatnullablee_RV[0.2/3.1]? Uncertainty in RVkm/sstat.errorfloatnullableDist[707/3158] Distance (1)pcpos.distance;pos.heliocentricinte_[Fe/H][0.047/0.2] Uncertainty in [Fe/H]stat.error;phys.abund.FefloatAv[0.9/2.8] Extinction coefficient (1)magphys.absorption.coefffloate_Av[0.019/0.2] Uncertainty in Avmagstat.errorfloatAllDisplay all the information from this catalog for this source (link to Tables 2, 3, 5-9, A1 and A2)meta.ref.urlchar_RAPositions from LAMOST names (right ascension part)degpos.eq.ra;meta.main_DEPositions from LAMOST names (declination part)degpos.eq.dec;meta.mainJ/ApJS/260/35/table9The peculiar velocities of the 16 runaway CBe stars identified from the LAMOST MRS DR7 sample_RAPositions from LAMOST names (right ascension part)degpos.eq.ra;meta.main_DEPositions from LAMOST names (declination part)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLAMOSTLAMOST designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharpmRA[-4.6/4.2] Gaia EDR3 proper motion in Right Ascension, {mu}_{alpha}_mas/yrpos.pm;pos.eq.rafloate_pmRA[0.01/0.04] Uncertainty in pmPAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-6.9/0.91] Gaia EDR3 proper motion in Declination, {mu}_{beta}_mas/yrpos.pm;pos.eq.decfloate_pmDE[0.01/0.03] Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatplx[0.1/0.8] Gaia EDR3 parallaxmaspos.parallax.trigfloate_plx[0.01/0.03] Uncertainty in plxmasstat.error;pos.parallaxfloatVTp[24.7/48.8] Tangential peculiar velocitykm/sphys.veloc.transversefloate_VTp[0.9/3.6] Uncertainty in VTpkm/sstat.errorfloatZ[31.5/295.8] Height from the Galactic planepcpos.cartesian.z;pos.galacticfloatAllDisplay all the information from this catalog for this source (link to Tables 2, 3, 5-9, A1 and A2)meta.ref.urlcharGaiaDisplay data from Gaia EDR3 (I/350) within 3"meta.ref.urlcharJ/ApJS/260/35/tablea1Candidate Be stars displaying Ha emission profiles with absorption shell line identified from the LAMOST MRS DR7 samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLAMOSTLAMOST designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-7.7/66.4] Declination (J2000)degpos.eq.dec;meta.mainInd[1/3] Morphological classification type (1)meta.codeintAllDisplay all the information from this catalog for this source (link to Tables 2, 3, 5-9, A1 and A2)meta.ref.urlcharJ/ApJS/260/35/tablea2Candidate Be stars displaying Ha absorption profiles with shell line identified from the LAMOST MRS DR7 samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLAMOSTLAMOST designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-7.7/66.4] Declination (J2000)degpos.eq.dec;meta.mainInd[1/3] Morphological classification type (1)meta.codeintAllDisplay all the information from this catalog for this source (link to Tables 2, 3, 5-9, A1 and A2)meta.ref.urlcharJ/ApJS/260/35/refsReferencesRefReference codemeta.noteintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBibCodeADS bibcode of the referencemeta.bib.bibcodecharAuthFirst author's namemeta.bib.authorcharCommVizieR catalog referencemeta.id;meta.datasetchar