J/MNRAS/475/1609ivo://CDS.VizieR/J/MNRAS/475/1609doi:10.26093/cds/vizier.74751609CDSBailey J.I. IIIMateo M.White R.J.Shectman S.A.Crane J.D.2024-08-18T20:17:50Z2018-01-24T12:04:58ZCDS support team

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

cds-question@unistra.fropen-star-clustersspectroscopymetallicityeffective-temperatureradial-velocityspectroscopic-binary-starsWe present multi-epoch, high-dispersion, optical spectra obtained with the Michigan/Magellan Fiber System of 126 and 125 Sun-like stars in the young clusters NGC 2516 (141Myr) and NGC 2422 (73Myr). We determine stellar properties including radial velocity (RV), Teff, [Fe/H], [{alpha}/Fe], and the line-of-sight rotation rate, v_r_sin(i), from these spectra. Our median RV precision of 80m/s on individual epochs that span a temporal baseline of 1.1yr enables us to investigate membership, stellar binarity, and search for sub-stellar companions. We determine membership probabilities and RV variability probabilities for our sample along with candidate companion orbital periods for a select subset of stars. We identify 81 RV members in NGC 2516, 27 spectroscopic binaries (17 previously identified as photometric binaries), and 16 other stars that show significant RV variability after accounting for average stellar jitter found to be at the 74m/s level. In NGC 2422 we identify 57 members, 11 spectroscopic binaries, and 3 other stars that show significant RV variability after accounting for an average jitter of 138m/s. We use Monte Carlo simulations to verify our stellar jitter measurements, determine the proportion of exoplanets and stellar companions to which we are sensitive, and estimate companion mass limits for our targets. We also report mean cluster metallicity, velocity, and velocity dispersion based on our member targets and identify 58 non-member stars as RV variables - 24 of which have RV amplitudes that imply stellar or brown-dwarf mass companions. Finally, we note the discovery of a separate RV clustering of stars in our NGC 2422 sample.2018MNRAS.475.1609Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/475/1609CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/322 : UCAC4 Catalogue (Zacharias+, 2013)J/A+A/375/863 : Photometry and membership in NGC 2516 (Jeffries+, 2001)J/A+A/404/927 : Photometry and membership in NGC 2422 (Prisinzano+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/475/1609https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/475/1609http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/475/1609https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/475/1609https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/475/1609http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/475/1609GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/475/1609/tablea1 (NGC 2516)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/475/1609/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/475/1609/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/475/1609/tablea1?GETtext/xml+votable180.050000true119.50997-60.779810.005555555555555556Cone search capability for table J/MNRAS/475/1609/tablea2 (NGC 2422)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/475/1609/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/475/1609/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/475/1609/tablea2?GETtext/xml+votable180.050000true113.98966-14.544640.0055555555555555566/21528-21529 21531 37592-37593https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/475/1609?format=asciiOpticaldefaultJ/MNRAS/475/1609/tablea1NGC 2516recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintUCAC4UCAC4 (Cat. I/322) designationmeta.id;meta.maincharJ01Jeffries et al. (2001, cat. J/A+A/375/863) identification number (1)meta.idintRAJ2000Right Ascension from UCAC4 (J2000)degpos.eq.ra;meta.mainDEJ2000Declination from UCAC4 (J2000)degpos.eq.dec;meta.mainVmagV magnitude from photometry sourcemagphot.mag;em.opt.VfloatB-VB-V color from photometry sourcemagphot.color;em.opt.B;em.opt.VfloatPSrc[J01 U] Photometry Source: J01 or U (UCAC4) (1)meta.bibcharNNumber of usable spectra obtainedmeta.numberintS/NMean S/N (per pixel)stat.snrintTeff? Adopted effective temperature (G1)Kphys.temperature.effectiveintnullableE_Teff? Upper 1sigma uncertainty on Teff (G1)Kstat.error;stat.maxintnullablee_Teff? Lower 1sigma uncertainty on Teff (G1)Kstat.error;phys.temperature.effectiveintnullablef_Teff[0/1]? Teff correction applied if 1 (G1)meta.codeintnullable[Fe/H]? Adopted [Fe/H] abundance (G1)log(Sun)phys.abund.FefloatnullableE_[Fe/H]? Upper 1sigma uncertainty on [Fe/H] (G1)log(Sun)stat.error;stat.maxfloatnullablee_[Fe/H]? Lower 1sigma uncertainty on [Fe/H] (G1)log(Sun)stat.error;phys.abund.Fefloatnullable[a/Fe]? Adopted [a/Fe] abundance (G1)log(Sun)phys.abundcharE_[a/Fe]? Upper 1sigma uncertainty on [a/Fe] (G1)log(Sun)stat.error;stat.maxchare_[a/Fe]? Lower 1sigma uncertainty on [a/Fe] (G1)log(Sun)stat.error;phys.abundcharvrot? Stellar rotational velocity (G1) (G2)km/sphys.veloc.rotatcharE_vrot? Upper 1sigma uncertainty on vrot (G1)km/sstat.error;stat.maxfloatnullablee_vrot? Lower 1sigma uncertainty on vrot (G1)km/sstat.errorfloatnullablelog(g)? log(g) used for fitting (G1)log(cm.s**-2)instr.setupfloatnullableBRV? Weighted mean barycentric RV (G1)m/sphys.veloc;pos.barycenterintnullablee_BRV? Error on RVel (G1)m/sstat.errorintnullablesigobs? Standard deviation of measured RVs (G1)m/sstat.errorintnullablesigmeas? Mean RV measurement error (G1)m/sstat.errorintnullablePmem? RV membership probability (G3)stat.probabilityfloatnullableMem[MNPX] Membership Flag (G3)meta.code.errorcharTypeTarget type flag (G4)meta.codecharsigjit? Adopted stellar jitter (G5)m/sstat.stdev;phys.velocintnullablePvar? RV variable probability (G6)stat.fit.goodness;src.varfloatnullablePvarjit? RV variable prob. incl. jitter (G6)stat.errorfloatnullablePeriod? Optimized periodogram peak >95% CI (G6)dtime.period;stat.maxfloatnullableM3? 95% companion mass limit at 3 d (G6)(1.898187x10+27kg)phys.massfloatnullableM10? 95% companion mass limit at 10 d (G6)(1.898187x10+27kg)phys.massfloatnullableM20? 95% companion mass limit at 20 d (G6)(1.898187x10+27kg)phys.massfloatnullableMstar? Stellar mass for companion limit (G6)solMassphys.massfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/475/1609/tablea2NGC 2422recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintUCAC4UCAC4 (Cat. I/322) designationmeta.id;meta.maincharP03? Prisinzano et al. (2003, Cat. J/A+A/404/927) designation if exist (1)meta.idintnullableRAJ2000Right Ascension from UCAC4 (J2000)degpos.eq.ra;meta.mainDEJ2000Declination from UCAC4 (J2000)degpos.eq.dec;meta.mainVmagV magnitude from photometry sourcemagphot.mag;em.opt.VfloatB-VB-V color from photometry sourcemagphot.color;em.opt.B;em.opt.VfloatPSrcPhotometry Source: P03 or U (UCAC4) (1)meta.bibcharNNumber of usable spectra obtainedmeta.numberintS/NMean S/N (per pixel)stat.snrintTeff? Adopted effective temperature (G1)Kphys.temperature.effectiveintnullableE_Teff? Upper 1sigma uncertainty on Teff (G1)Kstat.error;stat.maxintnullablee_Teff? Lower 1sigma uncertainty on Teff (G1)Kstat.error;phys.temperature.effectiveintnullablef_Teff[0/1]? Teff correction applied if 1 (G1)meta.codeintnullable[Fe/H]? Adopted [Fe/H] abundance (G1)log(Sun)phys.abund.FefloatnullableE_[Fe/H]? Upper 1sigma uncertainty on [Fe/H] (G1)log(Sun)stat.error;stat.maxfloatnullablee_[Fe/H]? Lower 1sigma uncertainty on [Fe/H] (G1)log(Sun)stat.error;phys.abund.Fefloatnullable[a/Fe]? Adopted [a/Fe] abundance (G1)log(Sun)phys.abundcharE_[a/Fe]? Upper 1sigma uncertainty on [a/Fe] (G1)log(Sun)stat.error;stat.maxchare_[a/Fe]? Lower 1sigma uncertainty on [a/Fe] (G1)log(Sun)stat.error;phys.abundcharvrot? Stellar rotational velocity (G1) (G2)km/sphys.veloc.rotatcharE_vrot? Upper 1sigma uncertainty on vrot (G1)km/sstat.error;stat.maxfloatnullablee_vrot? Lower 1sigma uncertainty on vrot (G1)km/sstat.errorfloatnullablelog(g)? log(g) used for fitting (G1)log(cm.s**-2)instr.setupfloatnullableBRV? Weighted mean barycentric RV (G1)m/sphys.veloc;pos.barycenterintnullablee_BRV? Error on RVel (G1)m/sstat.errorintnullablesigobs? Standard deviation of measured RVs (G1)m/sstat.errorintnullablesigmeas? Mean RV measurement error (G1)m/sstat.errorintnullablePmem? RV membership probability (G3)stat.probabilityfloatnullableMem[MNPX] Membership Flag (G3)meta.code.errorcharTypeTarget type flag (G4)meta.codecharsigjit? Adopted stellar jitter (G5)m/sstat.stdev;phys.velocintnullablePvar? RV variable probability (G6)stat.fit.goodness;src.varfloatnullablePvarjit? RV variable prob. incl. jitter (G6)stat.errorfloatnullablePeriod? Optimized periodogram peak >95% CI (G6)dtime.period;stat.maxfloatnullableM3? 95% companion mass limit at 3d (G6)(1.898187x10+27kg)phys.massfloatnullableM10? 95% companion mass limit at 10d (G6)(1.898187x10+27kg)phys.massfloatnullableM20? 95% companion mass limit at 20d (G6)(1.898187x10+27kg)phys.massfloatnullableMstar? Stellar mass for companion limit (G6)solMassphys.massfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar