J/ApJS/254/31ivo://CDS.VizieR/J/ApJS/254/31doi:10.26093/cds/vizier.22540031CDSChiti A.Frebel A.Mardini M.K.Daniel T.W.Ou X.Uvarova A.V.2022-09-06T13:05:51Z2021-09-16T17:06:02ZCDS support team

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

cds-question@unistra.frmetallicityinfrared-photometryvisible-astronomyphotometrymilky-way-galaxysurveysThe Milky Way's metal-poor stars are nearby ancient objects that are used to study early chemical evolution and the assembly and structure of the Milky Way. Here we present reliable metallicities of ~280000 stars with -3.75<~[Fe/H]<~-0.75 down to g=17 derived using metallicity-sensitive photometry from the second data release of the SkyMapper Southern Survey. We use the dependency of the flux through the SkyMapper v filter on the strength of the CaII K absorption features, in tandem with SkyMapper u, g, i photometry, to derive photometric metallicities for these stars. We find that metallicities derived in this way compare well to metallicities derived in large-scale spectroscopic surveys, and we use such comparisons to calibrate and quantify systematics as a function of location, reddening, and color. We find good agreement with metallicities from the APOGEE, LAMOST, and GALAH surveys, based on a standard deviation of {sigma}~0.25dex of the residuals of our photometric metallicities with respect to metallicities from those surveys. We also compare our derived photometric metallicities to metallicities presented in a number of high-resolution spectroscopic studies to validate the low-metallicity end ([Fe/H]{<}-2.5) of our photometric metallicity determinations. In such comparisons, we find the metallicities of stars with photometric [Fe/H]{<}-2.5 in our catalog show no significant offset and a scatter of {sigma}~0.31dex level relative to those in high-resolution work when considering the cooler stars (g-i>0.65) in our sample. We also present an expanded catalog containing photometric metallicities of ~720000 stars as a data table for further exploration of the metal-poor Milky Way.2021ApJS..254...31Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/254/31CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/358 : SkyMapper Southern Sky Survey. DR1.1 (Wolf+, 2018)I/345 : Gaia DR2 (Gaia Collaboration, 2018)I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)J/AJ/90/2089 : Stars of very low metal abundance. I (Beers+, 1985)J/AJ/103/1987 : Stars of very low metal abundance (Beers+ 1992)J/A+A/439/129 : HERES II. Spectroscopic analysis (Barklem+, 2005)J/ApJ/652/1585 : Bright metal-poor stars from HES survey (Frebel+, 2006)J/A+A/484/721 : HES survey. IV. Candidate metal-poor stars (Christlieb+, 2008)J/AJ/137/4377 : List of SEGUE plate pairs (Yanny+, 2009)J/ApJ/762/26 : Most metal-poor stars. II. Galactic halo stars (Yong+, 2013)J/ApJS/210/23 : Line intensities in CN transitions (Brooke+, 2014)J/A+A/571/A47 : Extensive linelist of CH in atmospheres (Masseron+, 2014)J/ApJ/797/21 : Carbon-enhanced metal-poor stars (Placco+, 2014)J/ApJS/211/5 : Improved line data for the Swan system ^12^C^13^C (Ram+, 2014)J/ApJS/214/26 : Line lists for CN isotopes transitions (Sneden+, 2014)J/ApJ/807/171 : SkyMapper Survey metal-poor star spectrosc. (Jacobson+, 2015)J/AJ/151/144 : ASPCAP weights for APOGEE chemical elements (Garcia+, 2016)J/ApJ/847/142 : Ultra-metal-poor stars LTE & NLTE abund. (Ezzeddine+, 2017)J/ApJS/238/16 : LAMOST-DR3 very metal-poor star catalog (Li+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/254/31https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/254/31http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/254/31https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/254/31https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/254/31http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/254/31GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/254/31/table2 (Photometric metallicities of stars in SkyMapper DR2)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/254/31/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/254/31/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/254/31/table2?GETtext/xml+votable180.050000true10.46886-12.648856110.0055555555555555561/24 33 35 47 2/64-65 67-68 72 80 82 104 146 151 154 157 159 171 174-175 178-179 183-185 187 3/264 266-267 276 292 296 340 352-354 360 401-404 408 420 424 464-465 468 482 515 518-519 525 527 548-550 555 557-559 576 578-579 597-599 608-609 611 625 627 640-641 644-645 677-679 681-683 688 690-692 694-695 707 711 721-722 727 729-731 744-745 747 4/1060-1061 1063 1108 1112 1121-1124 1128 1172 1176 1188 1192 1296 1298 1304 1306-1307 1338 1364 1368 1420 1424 1426-1427 1448 1600-1602 1620 1624 1636 1640 1684 1688 1700 1704 1809 1812-1813 1833 1876 1880 1932 1934-1935 1944 1952 1954-1956 1960 2048-2049 2051-2054 2057 2059 2064 2066 2071 2081 2084-2086 2089 2091-2092 2094 2096-2097 2099 2104 2106-2107 2181 2183-2184 2204 2207 2211 2213-2215 2217-2219 2225-2227 2308 2322 2328 2330 2352 2354 2383 2385-2387 2405 2407 2413-2415 2440-2441 2443 2488 2490 2532-2533 2535 2541 2543 2569 2571-2573 2584 2623-2626 2628-2629 2666-2667 2680 2682 2701-2703 2705-2707 2721-2723 2757-2759 2772 2774-2775 2816 2818-2819 2825-2827 2839-2840 2842-2843 2881-2883 2892-2894 2896-2898 2900-2901 2903-2905 2907 2912-2913 2915 2984-2985 5/4248-4249 4251 4436 4440 4452 4456 4480-4482 4500 4504 4516 4520 4692 4696 4708 4712 4756 4760 4772 4776 5188 5190 5196 5198 5220 5222-5223 5240 5242 5312-5314 5316-5317 5320-5322 5344-5346 5396-5397 5399 5405 5407 5429 5460 5464 5476 5480 5684-5686 5688-5689 5691 5694-5695 5703 5720 5728 5731-5732 5736 5777-5780 5796 5800 6412-6413 6415 6484 6488 6500 6504 6548 6552 6564 6568 6740 6744 6756 6760 6804 6808 6820 6824 7188-7189 7232-7233 7256-7257 7260-7261 7263 7306 7329 7344-7345 7457 7460-7461 7472-7474 7476-7477 7479 7485 7508 7512 7524 7528 7688 7690-7691 7694-7695 7706 7711 7733-7735 7764 7780 7784 7812-7814 7828 7832 7844 7848 8200-8201 8203 8220-8221 8223 8225-8227 8232 8234-8235 8260 8262 8268 8270-8271 8279 8283 8320-8322 8328 8333-8335 8348-8350 8353 8355 8361-8363 8373 8380-8381 8383 8392-8393 8420-8422 8706 8709 8712 8714-8715 8717 8720 8722-8723 8728-8730 8741-8742 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31124-31126 31128-31130 31140-31142 31144-31146 31260-31261 31263 31316-31318 31320-31322 31332-31334 31336-31338 31380-31382 31384-31386 31396-31398 31400-31402 32809-32811 32889-32891 32896-32897 32899 32932 32934 33044-33046 33054 33076-33077 33092-33093 33102 33104-33105 33108 33111 33115 33127 33130-33131 33292 33294 33316 33318 33320-33321 33327-33329 33331 33404-33405 33407 33411 33416-33417 33419 33441-33443 33488 33490-33491 33496-33498 33501 33503 33528-33529 33531 33576-33578 33581-33583 33692-33693 34817 34819-34821 34823 34832-34833 34835 34841 34845-34847 34855 34877-34879 34884 34886-34887 34924-34925 34927 34961-34963 34972 34992 35008 35017 35019 35025 35027 35036-35038 35041 35043-35045 35047 35051 35053-35055 35061-35063 35280-35282 35296 35298-35299 35349 35351 35353 35355 35373 35375 35393-35395 35458 35461-35463 35592-35594 36952 36954 36958-36959 36972 36974-36975 36979 36985-36987 37124-37126 37136-37137 37139-37142 37148 37150 37176 37178 37264 37266 37272 37274 37764-37766 37772 37774 37792 37794-37796 37798 37800-37802 37804 38005 38007 38099 38105-38107 38125 38127 38147 38153-38155 38469-38471 38507 38591 38593-38595 39084 39086-39087 39168 39170 39176 39178-39179 39182 39204 39206 39212 39328 39330 39338 39716 39718 39724 39726 39856 39858 39864 39866-39867 39957 39989 39991 39997 39999 40085 40087 40093 40095 40117 40119 40125 40544-40545 40547 40553 40555 40641 40643 40676-40677 40679 40685 40687 41092-41093 41095-41098 41120 41122 41125 41127-41128 41130 41133 41135 41196-41198 41204-41206 41368-41370 41372-41373 41376-41377 41424-41425 41428-41429 41474-41475 41477-41479 41492-41494 41496-41498 41508-41509 41512 41514 41917-41919 41947 41949-41951 41955 41957-41959 42040-42041 42044 42084-42086 42096-42097 42100 42252-42254 42264-42265 42308-42309 42320-42321 42559 42602-42603 42623 42630-42631 42641-42643 42700-42702 42706-42707 42712 42732 42734-42735 42737 42739 42745-42747 42794-42795 42798-42799 42806-42807 42810-42811 42850-42851 42854-42855 42860-42861 42866-42867 42870-42871 42900-42902 42908 42910 42932 42934-42935 42944 42960-42961 42963-42965 42988 42990-42991 43103 43123 43165-43167 43181-43183 43185-43187 43202-43203 43271-43272 43274-43275 43521 43523 44096 44098-44099 44368-44370 44376 44378 45076-45077 45080 45082-45083 45087 45120 45129-45131 45139 45141-45143 45148-45150 45164-45166 45176-45177 45179-45180 45183 45188 45190 45312-45314 45316-45317 45328 45352 45354-45355 45373 45403 45409-45411 45456 45458-45459 45461-45463 46083 46090-46091 46320 46322-46323 46385-46387 46396 46398-46399 46432 46435 46437-46439 46496 46499 46632 47784-47785 47787 47800-47801https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/254/31?format=asciiOpticalInfrareddefaultJ/ApJS/254/31/table2Photometric metallicities of stars in SkyMapper DR2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainindexedDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainindexedgmag[8.88/17] De-reddened g band magnitudemagphot.mag;em.opt.Bfloatimag[8.48/16.6] De-reddened i band magnitudemagphot.mag;em.opt.Ifloat[Fe/H][-3.8/-0.6] Metallicitylog(Sun)phys.abund.Zfloate_[Fe/H][0.16/0.8] Uncertainty in [Fe/H]log(Sun)stat.error;phys.abund.FefloatGaia? Gaia EDR3 source identifiermeta.id.crossnullableFlag[0/1] Metal-rich or MS interloper flag (1=metal-rich) (1)meta.code.errorintSkyMapperDisplay the SkyMapper DR1.1 data (II/358) within 0.5"meta.ref.urlchar