J/ApJS/246/8ivo://CDS.VizieR/J/ApJS/246/8doi:10.26093/cds/vizier.22460008CDSZhang J.Zhang Y.Zhao Y.2022-11-03T08:18:01Z2020-06-26T07:59:03ZCDS support team

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

cds-question@unistra.frvariable-starsmetallicityvisible-astronomysloan-photometryWith the increase of known RR Lyrae stars, it is reliable to create classifiers of RR Lyrae stars based on their photometric data or combined photometric and spectroscopic data. Nevertheless the total number of known RR Lyrae stars is still too small compared with the large survey databases. So classification of RR Lyrae stars and other sources belongs to imbalanced learning. Based on Sloan Digital Sky Survey (SDSS) photometric and spectroscopic data, we apply cost-sensitive Random Forests fit for imbalanced learning to preselect RR Lyrae star candidates. Only with photometric data, u-g,g-r,r-i,i-z is the best input pattern. While also considering physical parameters (Teff, [Fe/H], log(g)), the optimal input pattern is Teff, [Fe/H], log(g), u-g,g-r,r-i,i-z, at this moment for cost-sensitive Random Forests, the performance metrics of completeness, contamination, and Matthews correlation coefficient are 0.975, 0.019, and 0.975, respectively. It indicates that adding stellar physical parameters is helpful for identifying RR Lyrae stars from other stars. We apply the best classifiers on the SDSS photometric data and combined photometric data with physical parameters to select RR Lyrae star candidates. Finally 11,041 photometric candidates with spectral type A and F are obtained, and then 304 candidates with physical parameters are selected out. Among the 304 candidates, a small part are HB stars, BS stars, RGB stars, and peculiar stars, and the rest are unknown in the Simbad database. These candidates may be used as the input catalog for time-series follow-up observations.2020ApJS..246....8Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/246/8CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/147 : The SDSS Photometric Catalogue, Release 12 (Alam, 2015)J/AJ/132/1202 : RR Lyrae in Northern Sky Variability Survey (Kinemuchi+, 2006)J/A+A/548/A79 : INTEGRAL-OMC optically variable sources (Alfonso-Garzon+, 2012)J/ApJS/203/32 : Machine-learned ASAS Classif. Cat. (MACC) (Richards+, 2012)J/ApJ/763/32 : Galactic halo RRab stars from CSS (Drake+, 2013)J/ApJ/765/154 : RR Lyrae stars in the Catalina Sky Survey (Drake+, 2013)J/AJ/146/101 : LINEAR. III. Catalog of periodic variables (Palaversa+, 2013)J/ApJS/213/9 : Catalina Surveys periodic variable stars (Drake+, 2014)J/MNRAS/446/2251 : Southern Catalina Survey type-ab RR Lyrae (Torrealba+, 2015)J/AcA/66/131 : VI light curves of SMC and LMC RR Lyrae (Soszynski+, 2016)J/MNRAS/469/3688 : CSS Periodic Variable Star Catalogue (Drake+, 2017)http://www.sdss.org/ : SDSS home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/246/8https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/246/8http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/246/8https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/246/8https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/246/8http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/246/8GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/246/8/table4 (The catalog of RR Lyrae star candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/246/8/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/246/8/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/246/8/table4?GETtext/xml+votable180.050000true333.1985169.1332480.0055555555555555566/2 25 555 718 903 1013 1224 1699 2011 2285 2640 2848 2850 3967 4110 4129 4143 4152 4172 4209 4254 4436 4480 4553 4578 4630 4676 4733 4735 4745 4762 4769 4782 4791 4820 4841 4859 4965 5050 5107 5224 5255 5355 5370 5439 5543 5581 5671 5696 5886 5896 5900 5915 6052 6215 6219 6229 6300 6308 6416 6420 6453 6737 7249 7253 7309 7504 7516 7536 7785 7787 7826 8223 8265 8386 8451 8693 8825 8868 8907 8969 8971 9268 9293 9334 9337 9468 9489 9612 9626 9637 9669 9797 9849 9871 9936 9962 9978 9981 10234 10251 10339 10374 10410 10466 10492 10541 10573 10607 10625 10703 10752 10767 10796 10800 10988 11000 11064 11086 11175 11221 11225 11337 11446 11449 11453-11454 11571 11881 12388 12405 12521-12522 12525 12661 13420 13784 13786 13944 14023 14159 15797 15918-15919 16156 16185 17240 17243 17295 17304 17310 17313 17370 17407 17562 17575 17751 17769 17830 17835 17900 18021 18065 18067-18068 18085 18112-18114 18232 18235 18311 18385 18522 18544-18545 18610 18777 18791 18800 18830 18852 18860 18927 19023 19025 19030 19096 19106 19109 19243 19265 19330 19598 19647 19690 19693 19749 19757 19953 20158 20162 20249 20275 20278 20461 21763 21768 21783 21878 22002 22183 22366 22391 22512 22827 22829 22831 23051-23052 23193 23204 23354 23428 23530 23861 25289 25340 25942 25945 26109 26118 26171 26194 26262 26288 26348 26467 26483 26537 26539 26976 26992-26993 27026 27044 27046 27080 27239 27241 27251 27525 27536 27542 27612 27649 27657 27755 27830 27866 27905 27946 27986 28203 28291 28296 28309 28438 28501 28608 29777 30035 30041 31440 31445 31535 31621 31653 31666 31882-31883 31904 32108 32180 32432 32444-32445 32527-32528 32530-32531 36782 48859 49020 491282.040811542443644e-19 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/246/8?format=asciiOpticaldefaultJ/ApJS/246/8/table4The catalog of RR Lyrae star candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOTObject type for the 14 known sources in SIMBAD; column added by CDS from Table 3src.classcharSDSSSDSS identifier (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000[-17/83.2] Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainTeff[4716/8902] Effective temperatureKphys.temperature.effectivedouble[Fe/H][-3.1/0.3] Metallicitylog(Sun)phys.abund.Zdoublelog(g)[1.3/4.7] log surface gravitylog(cm.s**-2)phys.gravitydoubleumag[14.7/21.9] Apparent SDSS u band (AB) magnitudemagphot.mag;em.opt.Udoublegmag[13.5/25.2] Apparent SDSS g band (AB) magnitudemagphot.mag;em.opt.Bdoublermag[13.2/24.9] Apparent SDSS r band (AB) magnitudemagphot.mag;em.opt.Rdoubleimag[13.5/20.1] Apparent SDSS i band (AB) magnitudemagphot.mag;em.opt.Idoublezmag[13/19.5] Apparent SDSS z band (AB) magnitudemagphot.mag;em.opt.IdoubleSloanDisplay the online SDSS-DR15 data for the nearest objectmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar