J/AJ/159/43ivo://CDS.VizieR/J/AJ/159/43doi:10.26093/cds/vizier.51590043CDSHou W.Luo A.-L.Li Y.-B.Qin Li2020-04-16T13:22:09Z2020-04-09T07:42:31ZCDS support team

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

cds-question@unistra.frvariable-starsnovaevisible-astronomyspectroscopyam-starsA sample of cataclysmic variables (CVs) is presented including spectroscopically identified 380 spectra of 245 objects, of which 58 CV candidates are new discoveries. The BaggingTopPush and the Random Forest algorithms are applied to the Fifth Data Release (DR5) of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) to retrieve CVs with strong emission lines and with broad absorption lines respectively. Based on spectroscopic classification, 134 dwarf novae, 41 nova-like variables, and 19 magnetic CVs are identified from the sample. In addition, 89 high-inclination systems and 33 CVs showing companion stars are recognized and discussed for their distinct spectral characteristics. Comparisons between CVs from LAMOST and from published catalogs are made in spatial and magnitude distribution, and the difference of their locus in the Gaia color-absolute magnitude diagram (CaMD) are also investigated. More interestingly, for two dwarf novae observed through LAMOST and SDSS in different epochs, their spectra both in quiescence phase and during outburst are exhibited.2020AJ....159...43Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/159/43CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/vsx : AAVSO International Variable Star Index VSX (Watson+, 2014)B/gcvs : General Catalogue of Variable Stars (Samus+, 2017)V/123 : Catalog of Cataclysmic Variables (Downes+ 2001-2006)V/164 : LAMOST DR5 catalogs (Luo+, 2019)J/ApJ/565/511 : Cataclysmic variables in the 2MASS 2IDR (Hoard+, 2002)J/AJ/134/185 : Cataclysmic variables from SDSS-DR5 (Szkody+, 2007)J/AJ/142/181 : CVs from SDSS. VIII. The final year (Szkody+, 2011)J/AJ/144/81 : Spectrosc. & phot. of CV candidates (Thorstensen+, 2012)J/MNRAS/421/2414 : Faint cataclysmic variables from SDSS (Woudt+, 2012)J/MNRAS/443/3174 : 72 faint CV candidates in CRTS (Breedt+, 2014)J/MNRAS/441/1186 : Cataclysmic variables from CRTS (Drake+, 2014)J/AcA/65/313 : Thousand new dwarf novae from the OGLE Survey (Mroz+, 2015)J/MNRAS/456/4441 : Outburst catalogue cataclysmic variables (Coppejans+, 2016)J/MNRAS/465/4968 : Cataclysmic variables observations (Hardy+, 2017)J/other/RAA/18.68 : Cataclysmic variables from LAMOST DR3 (Han+, 2018)J/ApJS/234/31 : Carbon stars from LAMOST using machine learning (Li+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/159/43https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/159/43http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/159/43https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/159/43https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/159/43http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/159/43GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/159/43/table3 (Catalog of cataclysmic variables (CVs) selected from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data Release 5 (DR5))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/159/43/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/159/43/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/159/43/table3?GETtext/xml+votable180.050000true3.0187922.0249470.0055555555555555566/85 414 511 602 779 781 901 928 1043 1179 1202 1204 1243 1253 1282 1297 1332 1378 1387 1397 1413 1415 1445 1470 1568 1596 1633 1685 1690 1694 1750 1772 1781 2073 2079 2134 2153 2154 2188 2204 2244 2248 2280 2294 2297 2435 2440 2567 2607 2659 2674 2686 2717 2754 2906 3020 3097 4123 4196 4273 4279 4296 4336 4356 4367 4377 4479 4515 4603 4607 4723 4740 4757 4790 4924 4964 4988 4999 5107 5115 5129 5191 5210 5345 5409 5485 5650 5809 5864 5883 5918 6052 6237 6274 6315 6324 6376 6491 6567 6599 6608 6643 6657 6668 6694 6721 6750 6829 6860 6883 6921 7046 7211 7306 8265 8281 8474 8545 8552 8596 8804 8977 9141 9165 9267 9311 9333 9419 9441 9481 9484 9503 9527 9578 9669 9672 9723 9738 9829 10434 10799 10999 11072 11084 11112 11122 12556 13245 13421 13691 14018 14026 14441 14964 15041 15090 15110 15122 15133 15150 17566 17790 17818 17886 18095 18169 18229 18431 18844 18862 19009 19039 19169 19178 19180 19316 19526 19592 19950 20025 20066 20168 20296 20318 20351 21438 22464 22485 22745 22838 23275 23653 23702 23719 23767 23773 23841 23862 23908 23946 23994 24016 24028 24046 24061 24106 24113 24139 24164 24198 24217 24283 24376 24390 24412 24466 24470 24481 24483 24484 24487 24490 25577 26157 26328 27204 27343 27480 27482 27612 28082 28127 28221 28423 28501 31357 31997 32552 32645https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/159/43?format=asciiOpticaldefaultJ/AJ/159/43/table3Catalog of cataclysmic variables (CVs) selected from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data Release 5 (DR5)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintf_LAMOST[*] Flag on LAMOST, indicate the newly discovered CV spectra (71 occurrences)meta.codecharLAMOSTLAMOST designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharOName? Previous identifications of known CVsmeta.idcharRAJ2000[3/356] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-8.6/58.1] Declination (J2000)degpos.eq.dec;meta.mainMJD[55859/57912] Local modified Julian Date of observation, (JD-2400000.5)dtime.epochintTypeSubtypes of CVs (1)src.classcharType-litLiterature subtypes of CVssrc.classcharCN[y/n] CIII/NIII emission line detection; y=yes (119 occurrences), n=no (261 occurrences)meta.codecharFeII[y/n] Fe II emission line detection; y=yes (127 occurrences), n=no (253 occurrences)meta.codecharHa[S/D] S=Single-peak (291 occurrences) or D=Double-peak (89 occurrences) H{alpha} linemeta.codecharHb/HeII[-9999.0/9999.0] Ratio, H{beta}/HeII 4686A (2)phot.flux;arith.ratiodoubleHeII/Hb[-9999.0/9999.0] Ratio, HeII 4686A/H{beta} (2)phot.flux;arith.ratiodouble