J/ApJ/676/1109ivo://CDS.VizieR/J/ApJ/676/1109doi:10.26093/cds/vizier.16761109CDSFuresz G.Hartmann L.W.Megeath S.T.Szentgyorgyi A.H.Hamden E.T.2017-07-04T07:09:17Z2010-11-05T14:07:36ZCDS support team

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

cds-question@unistra.fropen-star-clusterspre-main-sequence-starsradial-velocityvisible-astronomyh-alpha-photometryline-intensitiesinfrared-photometryWe present results from 1351 high-resolution spectra of 1215 stars in the Orion Nebula Cluster (ONC) and the surrounding Orion 1c association, obtained with the Hectochelle multiobject echelle spectrograph on the 6.5m MMT. We confirmed 1111 stars as members, based on their radial velocity and/or H{alpha} emission. The radial velocity distribution of members shows a dispersion of {sigma}=3.1km/s. We found a substantial north-south velocity gradient and spatially coherent structure in the radial velocity distribution, similar to that seen in the molecular gas in the region. We also identified several binary and high velocity stars, a region exhibiting signs of triggered star formation, and a possible foreground population of stars somewhat older than the ONC.2008ApJ...676.1109Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/676/1109CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/660/704 : Optical and X-ray variability of ONC PMS (Stassun+, 2007)J/ApJ/660/1462 : Abundances of ONC X-ray PMS stars (Maggio+, 2007)J/ApJ/671/605 : NGC 2264 and ONC PMS stars in the infrared (Cieza+, 2007)J/ApJS/183/261 : Optical photometry of the ONC (Da Rio+, 2009)Table1: Summary of Spectroscopic Observationshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/676/1109https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/676/1109http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/676/1109https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/676/1109https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/676/1109http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/676/1109GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/676/1109/stars (Spectroscopic results })https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/676/1109/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/676/1109/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/676/1109/stars?GETtext/xml+votable180.050000true83.324583-5.3605560.0055555555555555566/21435 21436 21438 21439 22804 22805 228481.5062136169708525e-19 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/676/1109?format=asciiOpticalInfrareddefaultJ/ApJ/676/1109/starsSpectroscopic results }recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS identification (HHMMSSS+DDMMSS)meta.idcharMmSimbad column added by the CDSmeta.code.membercharIDThis paper's identification (1)meta.id;meta.maincharJmag2MASS J band magnitudemagphot.mag;em.IR.JfloatJ-K2MASS J-K color indexmagphot.color;em.IR.J;em.IR.KfloatH-K2MASS H-K color indexmagphot.color;em.IR.H;em.IR.Kfloat3.6-4.5? IRAC (3.6-4.5) micron band color indexmagphot.color;em.IR;em.IRfloatnullable5.8-8.0? IRAC (5.8-8.0) micron band color indexmagphot.color;em.IR;em.IRfloatnullableHRV? Measured heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_HRV? Error estimate in HRV from xcsaokm/sstat.errorfloatnullableRCross-correlation signal-to-noisestat.snrfloatSCross-correlation function peak heightstat.fit.paramfloatEWc? H{alpha} absolute equivalent width (2)0.1nmspect.line.eqWidth;em.line.HalphafloatnullableFW10? H{alpha} full width at 10% of corrected maximumkm/sspect.line.widthintnullableHaH{alpha} emission profile note (3)meta.codecharCCFCross-correlation function note (4)meta.codecharNNumber of observationsmeta.numberint2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlchar_RAPosition from 2MASS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from 2MASS name (declination part)degpos.eq.dec;meta.main