Stellar abundances from LAMOST MRS (SPCAnet) J/ApJ/891/23 ivo://CDS.VizieR/J/ApJ/891/23 doi:10.26093/cds/vizier.18910023 CDS Wang R. Luo A.-L. Chen J.-J. Hou W. Zhang S. Zhao Y.-H. Li X.-R.,Hou Y.-H. 2022-07-19T08:10:07Z 2021-09-02T15:25:52Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr chemical-abundances effective-temperature radial-velocity visible-astronomy spectroscopy surveys The fundamental stellar atmospheric parameters (Teff and logg) and 13 chemical abundances are derived for medium-resolution spectroscopy from Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Medium Resolution Survey (MRS) data sets with a deep-learning method. The neural networks we designed, named SPCANet, precisely map LAMOST MRS spectra to stellar parameters and chemical abundances. The stellar labels derived by SPCANet have precisions of 119K for Teff and 0.17dex for logg. The abundance precision of 11 elements including [C/H], [N/H], [O/H], [Mg/H], [Al/H], [Si/H], [S/H], [Ca/H], [Ti/H], [Cr/H], [Fe/H], and [Ni/H] are 0.06 {\sim} 0.12 dex, while that of [Cu/H] is 0.19dex. These precisions can be reached even for spectra with signal-to-noise ratios as low as 10. The results of SPCANet are consistent with those from other surveys such as APOGEE, GALAH, and RAVE, and are also validated with the previous literature values including clusters and field stars. 2020ApJ...891...23W https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/891/23 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to III/279 : RAVE 5th data release (Kunder+, 2017) V/153 : LAMOST DR4 catalogs (Luo+, 2018) J/AJ/137/4377 : List of SEGUE plate pairs (Yanny+, 2009) J/AJ/142/193 : RAVE stellar elemental abundances (DR1) (Boeche+, 2011) J/other/RAA/11.924 : Atmospheric parameters for 771 stars (Wu+, 2011) J/A+A/562/A71 : Abundances of solar neighbourhood dwarfs (Bensby+, 2014) J/ApJ/808/16 : Cannon: a new approach to determine abundances (Ness+, 2015) J/A+A/573/A55 : Gaia-ESO Survey: Tr20, NGC 4815 & 6705 (Tautvaisiene+, 2015) J/AJ/151/144 : ASPCAP weights for 15 APOGEE elements (Garcia+, 2016) J/AJ/151/49 : M6 open cluster: star members (Kilicoglu+, 2016) J/ApJ/833/225 : -2.6<=[Fe/H]<=0.2 F & G dwarfs. II. Abund. (Zhao+, 2016) J/A+A/603/A2 : Gaia-ESO Survey abund. radial distribution (Magrini+, 2017) J/MNRAS/478/4513 : GALAH Survey DR2 (Buder+, 2018) J/AJ/156/142 : Cluster abund. for APOGEE using SDSS DR14 (Donor+, 2018) J/AJ/156/126 : Stellar abundances from BACCHUS analysis (Jonsson+, 2018) J/A+A/628/A54 : Fe, Mg, Ti in Galactic clusters (Kovalev+, 2019) J/A+A/622/A191 : 885 globular cluster giants abundances (Masseron+, 2019) J/ApJS/244/27 : Radial velocity measurements in LAMOST-II (Wang+, 2019) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/891/23 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/891/23 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/891/23 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/891/23 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/891/23 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/891/23 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJ/891/23/catalog (LAMOST MRS Stellar Parameters and Chemical Abundances catalog) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/891/23/catalog? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/891/23/catalog? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/891/23/catalog? GET text/xml+votable 180.0 50000 true 15.474296 3.8228005 0.005555555555555556 3/375 4/19-21 23 25 28-29 54 63-65 88-89 91 96 107-110 113 120 122-123 152 176 183 189-190 196 201 203 206-210 224 267-268 270-271 280 282 289 292-293 296 304 354 358-359 362 388 390-391 414 422 426 432 450 458 526 562-563 568 610 615 622 646 649 652 667-668 676 686 697 708 710 748 835 841 858 880 891 893-894 934 944 1116 1127 1130 1387 1390 1399 1401 1469 1477 1485 1497 1499 1505 1512 1515 1521 1523-1525 1625-1626 1641 1648 1661 1687 1692-1693 1708 1718 1730 1752 1759 1780-1781 1784 1790 1986 2031 2034 2036 5/30-31 42 75 89-91 97 99 104-106 108 120-121 124 128 131 134 137 139-140 142 149 151 192 194-195 198-199 205 207 210 214-215 220-222 247 264-266 268-270 278 280-281 283-286 289-292 294 297 299-300 320-321 323-326 335 339-340 342 344-346 348 360-361 363 368 405 407 411 414-415 418 423-424 448-449 458-459 462-463 484 486-487 498-499 501-505 508-510 565 567 586-587 618-619 622 629-631 633 636 645 647 653 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27119 27132-27134 27142-27143 27145 27147 27154 27164 27166 27169 27171 27180-27181 27188 27190 27192-27193 27196 27241-27243 27252 27254-27255 27285 27287 27293 27352-27354 27361 27364-27365 27405 27407 27412 27414-27415 27426 27429 27432 27434 27449 27451 27457-27460 27462-27463 27474 27486 27508 27510 27516 27518 27520 27522 27540-27541 27581-27583 27596-27597 27604 27606 27608-27609 27623 27634-27635 27638 27649-27651 27664 27666-27667 27775 27784-27785 27788 27893 27946-27947 27950 27971 27973-27975 27980-27981 27986 28021-28023 28025 28027 28064-28065 28068-28069 28079 28083 28086-28087 28115 28133-28135 28375 28381 28383 28405 28421 28423 28440-28441 28443 28459 28462 28513 28516-28517 28537 28540 28560 28562 28568 28570 28575 28580-28582 28592 28597-28599 28604-28605 28607 28629-28631 28634 28656 28658 28660-28661 30022-30023 30034-30035 30038 30064-30065 30068 30209-30211 30226 30252-30253 30264 30837 30839 30845 30847 30933 31012 31014-31015 31032 31034 31095 31101 31103 31120 31274 31369-31370 31398-31399 31401 31403 31410-31411 31420 31422 31681-31683 31698 31712-31713 31715 31724-31725 31736 31794 31888-31890 31927 31970-31971 31974 32177 32179 32250 32276-32277 32279 32285 32328-32329 32332-32333 32351 32373-32375 32413 32415 32437 32439 32450-32451 32454-32455 32468-32469 32471 32488-32489 32492-32493 32529 32531 32538 32541 32560-32562 32568 32570 32600-32601 32609 32612-32613 32644-32646 32648 32650-32651 32671 32680-32682 32687 32691 32714-32715 32718 32748-32750 44921-44923 45016-45017 45019 49142-49143 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/891/23?format=ascii Optical default J/ApJ/891/23/catalog LAMOST MRS Stellar Parameters and Chemical Abundances catalog Qual Quality flag: 1=good, 0=bad meta.code.qual int recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Nmes Number of measurements for this star meta.number int nullable LAMOST LAMOST identifier (JHHMMSS.ss+DDMMSS.s) meta.id;meta.main char Gaia Gaia DR2 identifier from cross-match meta.id.cross char spID_blue LAMOST spectral ID for the blue part meta.id char spID_red LAMOST spectral ID for the red part meta.id char RAJ2000 Right ascension (J2000) deg pos.eq.ra;meta.main indexed DEJ2000 [-10/79.1] Declination (J2000) deg pos.eq.dec;meta.main indexed S/N_blue [10/722] Signal-to-noise ratio of the blue part stat.snr float S/N_red [10/801] Signal-to-noise ratio of the red part stat.snr float RV_blue [-572/571] Uncalibrated radial velocity of the blue part km/s phys.veloc;pos.heliocentric float RV_red [-576/618] Uncalibrated radial velocity of the red part km/s phys.veloc;pos.heliocentric float Teff [3587/7983] Effective temperature K phys.temperature.effective float logg [0.6/5.5] Log of surface gravity log(cm.s**-2) phys.gravity float [Fe/H] [-1.92/0.35]? Iron abundance with respect to hydrogen log(Sun) phys.abund.Fe double nullable [C/H] [-1.49/0.85]? Carbon abundance with respect to hydrogen log(Sun) phys.abund double nullable [N/H] [-1.17/0.46]? Nitrogen abundance with respect to hydrogen log(Sun) phys.abund double nullable [O/H] [-1.67/0.5]? Oxygen abundance with respect to hydrogen log(Sun) phys.abund double nullable [Mg/H] [-1.9/0.68]? Magnesium abundance with respect to hydrogen log(Sun) phys.abund double nullable [Al/H] [-1.32/0.54]? Aluminum abundance with respect to hydrogen log(Sun) phys.abund double nullable [Si/H] [-1.46/0.5]? Silicon abundance with respect to hydrogen log(Sun) phys.abund double nullable [S/H] [-1.32/0.46]? Sulfur abundance with respect to hydrogen log(Sun) phys.abund double nullable [Ca/H] [-1.45/0.49]? Calcium abundance with respect to hydrogen log(Sun) phys.abund double nullable [Ti/H] [-1.73/0.56]? Titanium abundance with respect to hydrogen log(Sun) phys.abund double nullable [Cr/H] [-1.45/0.52] Cadmium abundance with respect to hydrogen log(Sun) phys.abund float [Ni/H] [-1.63/0.62]? Nickel abundance with respect to hydrogen log(Sun) phys.abund double nullable [Cu/H] [-1.79/0.64]? Copper abundance with respect to hydrogen log(Sun) phys.abund double nullable spIDv LAMOST spectral ID (inform of Date, PlateID, SpectrographID, FiberID, MJM, PiplineVersion) meta.id char