J/ApJ/911/108ivo://CDS.VizieR/J/ApJ/911/108doi:10.26093/cds/vizier.19110108CDSHawkins K.Zeimann G.Sneden C.Mentuch Cooper E.Gebhardt K.,Bond H.E.Carrillo A.Casey C.M.Castanheira B.G.Ciardullo R.,Davis D.Farrow D.J.Finkelstein S.L.Hill G.J.Kelz A.Liu C.,Shetrone M.Schneider D.P.Starkenburg E.Steinmetz M.Wheeler J.C.,The HETDEX Collaboration2022-11-15T07:56:29Z2022-11-09T12:16:08ZCDS support team

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

cds-question@unistra.frchemically-peculiar-starsradial-velocityvisible-astronomyspectroscopyproper-motionsphotometrysurveysThe Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is an unbiased, massively multiplexed spectroscopic survey, designed to measure the expansion history of the universe through low-resolution (R~750) spectra of Ly{alpha} emitters. In its search for these galaxies, HETDEX will also observe a few times 105 stars. In this paper, we present the first stellar value-added catalog within the internal second data release of the HETDEX Survey (HDR2). The new catalog contains 120,571 low-resolution spectra for 98,736 unique stars between 10<G<22 spread across the HETDEX footprint at relatively high (b~60{deg}) Galactic latitudes. With these spectra, we measure radial velocities (RVs) for ~42,000 unique FGK-type stars in the catalog and show that the HETDEX spectra are sufficient to constrain these RVs with a 1{sigma} precision of 28.0km/s and bias of 3.5km/s with respect to the Large Sky Area Multi-Object Fibre Spectroscopic Telescope surveys and 1{sigma} precision of 27.5km/s and bias of 14.0km/s compared to the Sloan Extension for Galactic Understanding and Exploration survey. Since these RVs are for faint (G>=16) stars, they will be complementary to Gaia. Using t-Distributed Stochastic Neighbor Embedding (tSNE), we also demonstrate that the HETDEX spectra can be used to determine a star's Teff, and log g and its [Fe/H]. With the tSNE projection of the FGK-type stars with HETDEX spectra we also identify 416 new candidate metal-poor ([Fe/H]{<}-1dex) stars for future study. These encouraging results illustrate the utility of future low-resolution stellar spectroscopic surveys.2021ApJ...911..108Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/911/108CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/146 : LAMOST DR1 catalogs (Luo+, 2015)I/345 : Gaia DR2 (Gaia Collaboration, 2018)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)J/AJ/136/2050 : SEGUE stellar parameter pipeline. II. (Lee+, 2008)J/AJ/136/2070 : SEGUE stellar param. pipeline. III. (Allende Prieto+, 2008)J/AJ/137/4377 : List of SEGUE plate pairs (Yanny+, 2009)J/AJ/141/89 : SEGUE stellar parameter pipeline. IV. (Smolinski+, 2011)J/ApJ/762/26 : Most metal-poor stars. II. Galactic halo stars (Yong+, 2013)J/AJ/147/136 : Stars of very low metal abundance. VI. (Roederer+, 2014)J/AJ/150/187 : Abundances & stellar parameters of LAMOST stars (Lee+, 2015)J/MNRAS/472/2517 : Stellar twins in RAVE with Gaia (Jofre+, 2017)J/AJ/155/181 : LAMOST/SP_Ace DR1 catalog (Boeche+, 2018)J/MNRAS/478/4513 : GALAH Survey DR2 (Buder+, 2018)J/ApJS/238/16 : LAMOST-DR3 very metal-poor star catalog (Li+, 2018)J/ApJ/868/110 : R-Process Alliance: 1st release in Gal. halo (Sakari+, 2018)J/MNRAS/488/2283 : COMBS survey. Galactic Bulge metal-poor stars (Lucey+, 2019)J/ApJS/244/27 : Radial velocity measurements in LAMOST-II (Wang+, 2019)J/ApJS/245/34 : Abund. for 6 million stars from LAMOST DR5 (Xiang+, 2019)J/MNRAS/492/1164 : Abundances of Gaia DR2 wide binaries (Hawkins+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/911/108https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/911/108http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/911/108https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/911/108https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/911/108http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/911/108GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/911/108/table1 (The HETDEX-Gaia value-added catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/911/108/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/911/108/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/911/108/table1?GETtext/xml+votable180.050000true6.35809240149-0.013184141830.0055555555555555565/1399 1405-1406 1485-1486 1489-1490 2494 2536 2685-2687 2749-2750 2765-2767 2769-2770 2775 2779-2780 2785-2786 2788 2791 2796 2800 2829-2831 2833-2836 2840 2849-2852 2856-2857 3839 4010 4442 4453-4454 4457-4458 4501-4502 4505-4506 4517-4518 6/601 1885-1886 1906 1985 1988 5609 5611 5614-5615 5617-5619 5628-5630 5855 5917-5919 5935 5937-5939 5948-5949 5954-5955 5964-5966 5968-5970 5973-5975 5977-5978 5980-5981 5984-5986 6021 6024-6026 7089 7092 8972 9853 9941 9966-9967 9969 9982-9983 10024 10121-10123 10126 10148 10150 10152-10154 10231 10237 10239 10711 10716 10718-10719 10726-10727 10735 10739 10973-10975 10983 10989-10992 10994-10995 11004-11006 11038-11039 11053-11055 11059 11075 11084-11086 11088-11090 11094-11095 11098-11099 11104-11105 11111 11113-11115 11124 11128 11138-11139 11148-11150 11157-11159 11161-11163 11168-11170 11172-11173 11175-11177 11179-11182 11188 11192 11204 11208 11230 11252 11295 11310-11311 11314-11315 11331 11348-11350 11352-11354 11364-11366 11368-11370 11393 11395 11412-11414 11416-11418 11433-11436 11604 11606 11776-11778 15355 16046 17661-17663 17725-17727 17762-17763 17766 17772 17774 17805 17807 17810-17811 17820-17822 17825-17827 17836-17838 17840-17842 17856-17858 17983 17997-17999 18002-18003 18012-18014 18019 18028-18030 18032-18034 18063 18065 18067 18076-18077 18112-18114 18176-18178 19030 19033 19036 26292-26293 27247 27256 27258-272591.9867573869263685e-19 4.621782916333392e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/911/108?format=asciiOpticaldefaultJ/ApJ/911/108/table1The HETDEX-Gaia value-added catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source identifiermeta.id;meta.mainRA_ICRS[5.87/335.05] Gaia DR2 right ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainindexedDE_ICRS[-1.11/67.87] Gaia DR2 declination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainindexedGmag[4.63/21.71] Mean Gaia DR2 G band magnitudemagphot.mag;em.optfloat_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decnullableindexedBP-RP[-1.92/5.1]? Gaia DR2 (Blue-Red) passband colormagphot.color;em.opt.B;em.opt.RfloatnullableSNR[0/251]? HETDEX SNRpixel**-1stat.snrfloatnullableRVel[-999/999]? HETDEX radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RVel[0.04/1176725]? Uncertainty in RVelkm/sstat.error;spect.dopplerVelocdoublenullableBcor[-30.4/30]? Barycentric correction for RVelkm/sphys.veloc;arith.difffloatnullablee_RA_ICRS[0.006/91] Uncertainty in RAdegdegstat.error;pos.eq.rafloate_DE_ICRS[0.009/94] Uncertainty in DEdegdegstat.error;pos.eq.decfloatplx[-18/41]? Gaia DR2 parallaxmaspos.parallax.trigfloatnullablee_plx[0.01/4.6]? Uncertainty in plxmasstat.error;pos.parallaxfloatnullablepmRA[-869/300]? Gaia DR2 proper motion along RAmas/yrpos.pm;pos.eq.rafloatnullablee_pmRA[0.02/5.1]? Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE[-545/296]? Gaia DR2 proper motion along DEmas/yrpos.pm;pos.eq.decfloatnullablee_pmDE[0.02/5.4]? Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatnullableDupDuplicated source? ("false" or "true")meta.codecharGFlux[39/264144000] Mean Gaia DR2 G band flux (1)1e-14W.m**-2phot.flux.density;em.optdoublee_GFlux[0.5/771430] Uncertainty in GFlux (1)1e-14W.m**-2stat.errordoubleBPFlux[3/163728000]? Mean Gaia DR2 Blue passband flux (1)1e-14W.m**-2phot.flux.density;em.opt.Bdoublenullablee_BPFlux[0.06/264439]? Uncertainty in BPFlux (1)1e-14W.m**-2stat.errordoublenullableBPmag[4.8/24.13]? Mean Gaia DR2 Blue passband magnitudemagphot.mag;em.opt.BfloatnullableRPFlux[5/124350000]? Mean Gaia DR2 Red passband flux (1)1e-14W.m**-2phot.flux.density;em.opt.Rdoublenullablee_RPFlux[0.1/349102]? Uncertainty in RPFlux (1)1e-14W.m**-2stat.errordoublenullableRPmag[4.5/23]? Mean Gaia DR2 Red passband magnitudemagphot.mag;em.opt.RfloatnullableGRVel[-279/125]? Gaia DR2 radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_GRVel[0.1/20]? Uncertainty in GRVelkm/sstat.errorfloatnullableNGRVel[0/87] Number of Gaia DR2 radial velocity epochsmeta.numberintTeff[3229/9674]? Gaia DR2 Effective temperatureKphys.temperature.effectivefloatnullableAG[0.01/2.8]? Gaia G band extinctionmagphys.absorptionfloatnullableE(BP-RP)[0/1.43]? Estimate of reddeningmagphot.color.excessfloatnullableRad[0.5/82]? RadiussolRadphys.size.radiusfloatnullableLum[0.03/1606]? LuminositysolLumphys.luminosityfloatnullableHRVc[1/2]? Number of HETDEX Radial Velocity CCF Componentsmeta.numberfloatnullabletX[-46/49]? tSNE X-location (2)stat.fit.paramfloatnullabletY[-39/44]? tSNE Y-location (2)stat.fit.paramfloatnullableGaiaEDR3Gaia EDR3 source identifiermeta.id