J/ApJ/872/95ivo://CDS.VizieR/J/ApJ/872/95doi:10.26093/cds/vizier.18720095CDSMohammed S.Schiminovich D.Hawkins K.Johnson B.Wang D.Hogg D.W.2021-01-05T10:55:01Z2020-10-14T09:52:51ZCDS support team

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

cds-question@unistra.frultraviolet-photometryvisible-astronomyinterstellar-reddeningmetallicitysurveysinfrared-astronomyspectroscopyAlthough core helium-burning red clump (RC) stars are faint at ultraviolet wavelengths, their ultraviolet (UV)-optical color is a unique and accessible probe of their physical properties. Using data from the Galaxy Evolution Explorer All Sky Imaging Survey (GALEX AIS), Gaia Data Release 2, and the Sloan Digital Sky Survey Apache Point Observatory Galactic Evolution Experiment (APOGEE) DR14 survey, we find that spectroscopic metallicity is strongly correlated with the location of an RC star in the UV-optical color-magnitude diagram. The RC has a wide spread in (NUV-G)_0_ color of over 4mag compared to a 0.7mag range in (G_BP_-G_RP_)_0_. We propose a photometric, dust-corrected, UV-optical (NUV-G)_0_ color-metallicity [Fe/H] relation using a sample of 5175 RC stars from APOGEE. We show that this relation has a scatter of 0.16dex and is easier to obtain for large, wide-field samples than for spectroscopic metallicities. Importantly, the effect may be comparable to the spread in RC color attributed to extinction in other studies.2019ApJ...872...95Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/872/95CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)II/335 : Revised cat. of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)III/284 : APOGEE-2 data from DR16 (Majewski+, 2017)I/345 : Gaia DR2 (Gaia Collaboration, 2018)V/164 : LAMOST DR5 catalogs (Luo+, 2019)J/AJ/120/1808 : Stroemgren photometry in LMC disk (Cole+, 2000)J/AJ/121/327 : Abundances of Red Clump Stars in NGC6819 (Bragaglia+, 2001)J/other/KFNT/23.102 : Candidate Red Clump stars in the Tycho-2 (Rybka+, 2007)J/A+A/523/A48 : Gaia photometry (Jordi+, 2010)J/A+A/527/A40 : Faint high-Galactic-lat. red clump stars (Saguner+, 2011)J/AJ/141/90 : SEGUE stellar parameter pipeline. V. (Lee+, 2011)J/MNRAS/419/1637 : Nearby red clump stars JHK observations (Laney+, 2012)J/MNRAS/421/3362 : Kinematics of galactic red clump stars (Bilir+, 2012)J/A+A/555/A91 : Kinematics of bulge red clump stars (Vasquez+, 2013)J/AJ/151/144 : ASPCAP weights for APOGEE chemical elements (Garcia+, 2016)J/MNRAS/469/4718 : Kepler red-clump stars in NGC6819 & NGC6791 (Bossini+, 2017)J/A+A/616/A10 : 46 open clusters GaiaDR2 HR diag. (Gaia Collaboration, 2018)J/A+A/609/A116 : Low extinction TGAS HR Catalogue (Ruiz-Dern+, 2018)J/ApJ/858/L7 : Red clump stars selected from LAMOST & APOGEE (Ting+, 2018)J/MNRAS/495/3087 : Photometry of 2.6million red clump stars (Lucey+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/872/95https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/872/95http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/872/95https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/872/95https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/872/95http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/872/95GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/872/95/table1 (Catalog-matched red clump (RC) star sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/872/95/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/872/95/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/872/95/table1?GETtext/xml+votable180.050000true0.1315.27170.0055555555555555564/414 585 594 5/372 508 607 1063 1069 1168 1215 1384 1389 1390 1419 1435 1456 1457 1479 1537 1552 1553 1555 1561 1597 1599 1600 1634 1636 1639 1644 1662 1663 1672 1685 1691 1719 1732 1748 1834 1840 2022 2175 2216 2234 2253 2300 2312 2314 2316 2318 2338 2339 2359 2365 2367 2373 2400 2401 2408 2416 2426 2453 2454 2471 2488 2497 2502 2521 2523 2526 2528 2530 2547 2548 2549 2553 2594 2674 2775 2849 3098 3646 3706 3734 3739 3741 3742 3743 3777 3782 3785 3786 3792 4061 4774 4993 5626 5798 6061 6372 6468 6871 7510 7849 7894 8125 10186 10187 6/71 77 78 79 82 133 134 135 141 145 146 147 152 176 178 184 374 381 383 408 410 421 432 434 470 476 477 479 523 524 527 545 547 549 550 551 854 885 1003 1056 1058 1059 1064 1065 1066 1087 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9.736485774071566e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/872/95?format=asciiUVOpticalInfrareddefaultJ/ApJ/872/95/table1Catalog-matched red clump (RC) star samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSGaia Barycentric Right Ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRS[-31.4/85] Gaia Barycentric Declination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainNUVmag[11.7/22.4] GALEX NUV magnitudemagphot.mag;em.UV.200-300nmfloate_NUVmag[0/0.4] Uncertainty in NUVmagmagstat.error;phot.magfloat(NUV-G)0[3.3/10.6] Dust corrected GALEX NUV-Gaia G band color indexmagphot.color;em.UV;em.optfloate_(NUV-G)0[0/0.4]? Uncertainty in (NUV-G)0magstat.errorfloatnullableBPmag[5/14.7] Gaia BP integrated magnitudemagphot.mag;em.opt.Bfloate_BPmag[0/0.05] Uncertainty in BPmagmagstat.error;phot.magfloat(BP-RP)0[0.5/2.1] Dust corrected Gaia BP-RP color indexmagphot.color;em.opt.B;em.opt.Rfloate_(BP-RP)0[0/0.06] Uncertainty in (BP-RP)0magstat.errorfloatE(B-V)[0/0.9] Reddening from Green+ (2015ApJ...810...25G)magphot.color.excessfloatDM[4.15/12.72] Distance modulusmagphot.mag.distModfloat[Fe/H][-1.14/0.5] Stellar metallicityphys.abund.Zfloate_[Fe/H][0.01] Uncertainty in [Fe/H]stat.error;phys.abund.FefloatTeff[4472/5193] Effective temperature from APOGEE (1)Kphys.temperature.effectivefloat[a/Fe][-0.07/0.4] {alpha} abundancephys.abundfloate_[a/Fe][-0.7/273] Uncertainty in [a/Fe]stat.error;phys.abundfloatT18Display data from Ting+, 2018, J/ApJ/858/L7, within 3"meta.ref.urlcharGaiaDisplay data from Gaia DR2 (I/345) within 3"meta.ref.urlcharGALEXDisplay data from GALEX AIS GR6+7 (II/335) within 3"meta.ref.urlcharAPOGEEDisplay data from APOGEE-2 DR16 (III/284) within 3"meta.ref.urlchar2MDisplay the 2MASS data (Cutri+ 2003, II/246) within 3"meta.ref.urlchar_RA.icrsRight ascension (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexed