J/ApJ/931/133ivo://CDS.VizieR/J/ApJ/931/133doi:10.26093/cds/vizier.19310133CDSChen J.Luo A.-L.Li Y.-B.Chen X.-L.Wang R.Li S.Du B.Ma X.-X.2024-09-09T20:16:54Z2023-09-13T15:32:19ZCDS support team

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

cds-question@unistra.frs-starsvisible-astronomyspectroscopysurveysinfrared-photometrychemical-abundancestwo-color-diagramstrigonometric-parallaxabsolute-magnitudeIn this paper, we report on 606 S-type stars identified from Data Release 9 of the LAMOST medium-resolution spectroscopic (MRS) survey; 539 of them are reported for the first time. The discovery of these stars is a three-step process, i.e., selecting with ZrO-band indices greater than 0.25, excluding non-S-type stars with the iterative Support Vector Machine method, and finally retaining stars with absolute bolometric magnitude larger than -7.1. The 606 stars are consistent with the distribution of known S-type stars in the color- magnitude diagram. We estimated the C/Os using the [C/Fe] and [O/Fe] provided by APOGEE and the MARCS model for S-type stars, respectively, and the results of the two methods show that the C/Os of all stars are larger than 0.5. Both the locations on the color-magnitude diagram and C/Os further verify the nature of our S-type sample. Investigating the effect of TiO and atmospheric parameters on ZrO with the sample, we found that log g has a more significant impact on ZrO than Teff and [Fe/H], and both TiO and logg may negatively correlate with ZrO. According to the criterion of Tian+ (2020, J/ApJS/249/22), a total of 238 binary candidates were found by the zero-point-calibrated radial velocities from the officially released catalog of LAMOST MRS and the catalog of Zhang+ 2021, J/ApJS/256/14.2022ApJ...931..133Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/931/133CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)V/156 : LAMOST DR7 catalogs (Luo+, 2019)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)J/MNRAS/400/1413 : Near-IR spectra of extremely red AGB stars (Wright+, 2009)J/AJ/142/103 : Cool evolved stars in SAGE-SMC and SAGE-LMC (Boyer+, 2011)J/ApJ/727/53 : Red supergiant stars in the LMC. I. (Yang+, 2011)J/ApJ/831/20 : C/O and Mg/Si for solar neighborhood's stars (Brewer+, 2016)J/A+A/601/A10 : MARCS model atmospheres for S stars (Van Eck+, 2017)J/AJ/156/90 : APOGEE radial velocity standard stars (Huang+, 2018)J/ApJ/858/L7 : Red clump stars selected from LAMOST & APOGEE (Ting+, 2018)J/MNRAS/475/3633 : Mass and age of red giant branch stars (Wu+, 2018)J/AJ/158/22 : IR study of intrinsic & extrinsic S-type stars (Chen+, 2019)J/A+A/629/A91 : A source catalog for the SMC (Yang+, 2019)J/ApJS/249/22 : Radial velocity variable stars from LAMOST DR4 (Tian+, 2020)J/ApJS/256/14 : RVs from LAMOST MRS DR7 stellar spectra (Zhang+, 2021)J/ApJS/256/43 : O-rich and C-rich AGB stars in our Galaxy (Suh, 2021)J/ApJS/267/5 : S-type stars from LAMOST MRS DR10 spectra (Chen+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/931/133https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/931/133http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/931/133https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/931/133https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/931/133http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/931/133GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/931/133/table7 (The S-type star catalog constructed in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/931/133/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/931/133/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/931/133/table7?GETtext/xml+votable180.050000true100.1027423.7328940.0055555555555555565/481 491 6/324 336 349 391 496 1033 1039 1046 1066 1081 1088 1110 1125 1137 1139 1158 1259 1280 1285-1286 1293 1297-1298 1301 1303 1308-1309 1311 1340 1346-1347 1349-1350 1352 1356-1357 1360 1379-1382 1387 1412 1417-1419 1422 1426 1431-1433 1435 1438-1440 1444 1446 1448 1454 1456 1458-1460 1462-1463 1465-1466 1468-1470 1504 1539 1663 1670 1715 1718 1726-1727 1729 1733 1741 1745 1761 1763 1771 1773-1774 1794-1795 1797 1809 1812-1814 1816 1819 1841 1921 1923 1943 1953 1958 1960-1961 1971 1976 1978 1987 2026 2040 2146 2282 2397 2438 2444 2527 2544 2821 2828 2847 2870 2902-2903 2907-2908 2912 2925 2927 2932 2935 2937 2939-2941 2975 2983 2989 2991 2999 3001-3002 3005 3010 3021 3025-3028 3040 3046 3049 3101 3117 3129 3131 3134-3136 3139-3142 3165 3167 3171 3174 3176 3178 3182 3189 3191 3198 3207 3217 3219-3220 3227-3229 3237 3247-3248 3250 3252 3254 3258 3260 3265 3272 3284-3286 3312 3318-3319 3323 3325 3327 3331 3337 3340 3343 3354 3363 3366 3370-3371 3489-3490 3494 3498 3587 3589 3591 3601-3602 3604-3605 3616-3617 3622 3651 3666 3668 3797 3801 3985 4290 4616 4647 4663 4746 4749 4798 6162 6271 6338 6346 6543 6667 6681 6807 6819 7073 9235 9490 9596 10439 11441 12720 13096-13097 13198 13203 13211 13217 13220 13223 13228 13236 13287 13291-13294 13299 13305 13308 13741 13835 13876 13888 13975 13982 13995-13997 14001 14006 14010 14016 14083 14109 14135 14145 14150 14172-14173 14176 14183 14196 14198 14217 14243 14253-14254 14259 14265 14268 14270 14288 14294 14303 14305 14312 14323 14329 14584 14657 14661 14674 14680 14691 14762 14933 14968 15364 15367 15376 15560 15621 20221 20350 21405 21456-21457 21465 22078 22095 22106-22108 22128 22135 22143 22145 22164 22166 22172 22193 22199 22203 22205 22211 22219 22222 22228 22238 22244 22247 22254 22256 22259 22266 22402 22406-22407 22420 22897 22902-22903 22988 22993 23003 23037 23380-23381 23495 23511 23547 23573 23591 23596-23597 23620 23633 23636 23639 23641 23675 23678 23760 23762 23765-23766 23768 23772-23773 23787 23808 23871 23896 23905 23915 23941 23943 23947-23950 23955-23956 23958-23960 23962 23966-23967 23972-23973 23975 23984 23987 23989-23992 23997-23998 24004-24005 24010 24024 24032-24034 24036 24044 24048 24050-24051 24201 24246 24286-24287 24297-24298 24316-24318 24327 24332 24336 24338-24339 24341 24343-24345 24347-24348 24350 24357 24368 24375 24381-24382 24385 24394 24406 24431 24442 24458-24460 24463 24466 24468-24469 24476 24480 24484 24489-24490 24492 24495 24504-24505 24512-24514 24517 24524 24528 24543 24551 24557 24570 24575 27500 30217 30226 30243-30245 31274 31368 31729 31787 31876 32624 326868.650015785639275e-20 4.621782916333392e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/931/133?format=asciiOpticalInfrareddefaultJ/ApJ/931/133/table7The S-type star catalog constructed in this workrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLAMOSTLAMOST DR9 designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-8/77] Declination (J2000)degpos.eq.dec;meta.mainSNR[5.4/715] Median Signal-to-Noise (1)stat.snr;stat.medianfloatTypeMain object type from SIMBADsrc.class;meta.maincharSpTypeSpectral type from SIMBADsrc.spTypecharTiO[-0.25/0.54] TiO index value (2)spect.indexfloatZrO[0.25/0.71] ZrO index value (2)spect.indexfloatBinBinary candidate class (3)meta.codecharC/O(A)[0/0.96]? Carbon to oxygen abundance ratio from APOGEE DR16 estimated by the [C/Fe] and [O/Fe]phys.abund;arith.ratiofloatnullableC/O(M)[0.5/0.99]? Carbon to oxygen abundance ratio from MARCS S-type modelphys.abund;arith.ratiofloatnullableMBol[-11.1/1.1] Absolute bolometric magnitudemagphys.magAbs.bolfloatplx[0.003/2.31] Gaia DR2 parallaxmaspos.parallax.trigfloate_plx[0.02/0.6] Uncertainty in plxmasstat.error;pos.parallaxfloatGmag[6.4/14.7] Mean Gaia DR2 G band magnitudemagphot.mag;em.optfloatBpmag[7.4/17.4] Mean Gaia DR2 Blue band magnitudemagphot.mag;em.opt.BfloatRpmag[5.5/13.3] Mean Gaia DR2 Red band magnitudemagphot.mag;em.opt.RfloatBp-Rp[1.87/7] Mean Gaia DR2 (Bp-Rp) color indexmagphot.color;em.opt.B;em.opt.RfloatJmag[3.3/11.5] 2MASS J band magnitudemagphot.mag;em.IR.Jfloate_Jmag[0.02/0.4] Uncertainty in Jmagmagstat.error;phot.magfloatHmag[1.9/10.7] 2MASS H band magnitudemagphot.mag;em.IR.Hfloate_Hmag[0.01/0.3] Uncertainty in Hmagmagstat.error;phot.magfloatKsmag[1/10.4]? 2MASS Ks band magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag[0/9.99]? Uncertainty in Ksmagmagstat.error;phot.magfloatnullableDR7Display the data from LAMOST DR7 MRS (V/156) within 0.5"meta.ref.urlintnullableZ21Display the data from Zhang+ 2021, J/ApJS/256/14 within 0.5"meta.ref.urlintnullable2MDisplay the 2MASS data (II/246) within 3"meta.ref.urlcharGaiaDisplay the Gaia DR2 (I/345) and DR3 (I/355) data within 3"meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar