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<ri:Resource created="2022-11-28T08:38:27Z" status="active" updated="2025-05-19T09:50:00Z" version="1.2" xmlns:cs="http://www.ivoa.net/xml/ConeSearch/v1.0" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ivoa.net/xml/ConeSearch/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/ConeSearch.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>LAMOST open clusters</title><shortName>J/A+A/668/A4</shortName><identifier>ivo://CDS.VizieR/J/A+A/668/A4</identifier><altIdentifier>doi:10.26093/cds/vizier.36680004</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Fu X.</name></creator><creator><name>Bragaglia A.</name></creator><creator><name>Liu C.</name></creator><creator><name>Zhang H.</name></creator><creator><name>Xu Y.</name></creator><creator><name>Wang K.</name></creator><creator><name>Zhang Z.-Y.,Zhong J. Z.</name></creator><creator><name>Chang J.</name></creator><creator><name>Li L.</name></creator><creator><name>Chen L.</name></creator><creator><name>Chen Y.</name></creator><creator><name>Wang F.</name></creator><creator><name>Gjergo E.,Wang C.</name></creator><creator><name>Yue N.</name></creator><creator><name>Zhang X.</name></creator><date role="Updated">2024-11-06T20:01:46Z</date><date role="Created">2022-11-28T08:38:27Z</date><contact><name>CDS support team</name><address>CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France</address><email>cds-question@unistra.fr</email></contact></curation><content><subject>milky-way-galaxy</subject><subject>open-star-clusters</subject><subject>chemical-abundances</subject><subject>spectroscopy</subject><subject>visible-astronomy</subject><description>Open clusters (OCs) are born and evolve along the Milky Way (MW) plane. On them is imprinted the history of the Galactic disc, including its chemical and dynamical evolution. Chemical and dynamical properties of OCs can be derived from photometric, spectroscopic, and astrometric data of their member stars. Based on the photometric and astrometric data from the Gaia mission, the membership of stars in more than two thousand Galactic clusters has been identified in the literature. The chemical properties (e.g. metallicity) and kinematical properties (e.g. radial velocity), however, are still poorly known for many of these clusters. In synergy with the large spectroscopic survey LAMOST (data release 8) and Gaia (data release 2), we report a new comprehensive catalogue of 386 OCs. This catalogue has homogeneous parameter determinations of radial velocity, metallicity, and dynamical properties, such as orbit, eccentricity, angular momenta, total energy, and 3D Galactic velocity. These parameters enable the first radial velocity determination for 44 clusters, and the first spectroscopic [Fe/H] determination for 137 clusters. The metallicity distributions of the majority of clusters show falling trends in the parameter space of the Galactocentric radius, the total energy, and the Z component of angular momentum, except for two old groups that show flat tails in their own parameter planes. Cluster populations of ages younger and older than 500 Myrs distribute diversely on the disc. The latter have a spatial consistency with the Galactic disc flare. The 3D spatial comparison between very young clusters (&lt;100 Myr) and nearby molecular clouds revealed a wide range of metallicity distribution along the Radcliffe gas cloud wave, indicating a possible inhomogeneous mixing or fast star formation along the wave. This catalogue will serve the community as a useful tool to trace the chemical and dynamical evolution of the MW.</description><source format="bibcode">2022A&amp;A...668A...4F</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/668/A4</referenceURL><type>Catalog</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/TAP">TAP VizieR generic service</relatedResource></relationship><relationship><relationshipType>IsServedBy</relationshipType><relatedResource>Conesearch service</relatedResource></relationship><relationship><relationshipType>related-to</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/I/345">I/345 : Gaia DR2 (Gaia Collaboration, 2018)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/640/A1">J/A+A/640/A1 : Portrait Galactic disc (Cantat-Gaudin+, 2020)</relatedResource><relatedResource>http://www.lamost.org/dr8/ : LAMOST DR8 home 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Standard deviation of the cluster RV (Vrad_std)</description><unit>km/s</unit><ucd>stat.stdev</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>RVT</name><description>? Cluster RV from Tarricq et al. (2021, Cat. J/A+A/647/A19) (RV_Tarricq21)</description><unit>km/s</unit><ucd>phys.veloc;pos.heliocentric</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_RVT</name><description>? Cluster RV error from Tarricq et al. (2021, Cat. J/A+A/647/A19) (e_RV_Tarricq21)</description><unit>km/s</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>NRVT</name><description>? Number of RV stars from Tarricq et al. (2021, Cat. J/A+A/647/A19) (NRV_Tarricq21)</description><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>RVD</name><description>? Cluster RV from Dias et al. (2021, Cat. J/MNRAS/504/356) (RV_Dias21)</description><unit>km/s</unit><ucd>phys.veloc;pos.heliocentric</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_RVD</name><description>? Cluster RV error from Dias et al. (2021, Cat. J/MNRAS/504/356) (e_RV_Dias21)</description><unit>km/s</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>NRVD</name><description>? Number of RV stars from Dias et al. (2021, Cat. J/MNRAS/504/356) (NRV_Dias21)</description><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>RVZ</name><description>? Cluster RV from Zhong et al. (2020, Cat. 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Standard deviation of the cluster [Fe/H] (FeH_std)</description><ucd>stat.stdev;phys.abund.Fe</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>[Fe/H]HRS</name><description>? Cluster [Fe/H] with HRS (FeH_HRS)</description><ucd>phys.abund.Fe</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_[Fe/H]HRS</name><description>? Cluster [Fe/H] uncertainty with HRS (FeH_HRS_err)</description><ucd>stat.error;phys.abund.Fe</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>N[Fe/H]HRS</name><description>? 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Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Cluster</name><description>Cluster name (cluster)</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="17*">char</dataType></column><column><name>Nall</name><description>Number of matched LAMOST stars (N_all)</description><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Nflag1</name><description>Number of stars with flag=1 (N_flag1)</description><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>e_RVmed</name><description>Median value uncertainty of the cluster radial velocity (Vrad_med_err)</description><unit>km/s</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>RVmean</name><description>Mean value of the cluster radial velocity (Vrad_mean)</description><unit>km/s</unit><ucd>phys.veloc;pos.heliocentric</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>e_RVmean</name><description>Mean value uncertainty of the cluster radial velocity (Vrad_mean_err)</description><unit>km/s</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>s_RV</name><description>? Standard deviation of the cluster radial velocity (Vrad_std)</description><unit>km/s</unit><ucd>stat.stdev;spect.dopplerVeloc</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>Nflag12</name><description>Number of stars with flag=12 (N_flag12)</description><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>[Fe/H]med</name><description>? Median value of the cluster [Fe/H] (FeH_med)</description><ucd>phys.abund.Fe;stat.median</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>e_[Fe/H]med</name><description>? Median value uncertainty of the cluster [Fe/H] (FeH_med_err)</description><ucd>stat.error;phys.abund.Fe</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>[Fe/H]mean</name><description>? Mean value of the cluster [Fe/H] (FeH_mean)</description><ucd>phys.abund.Fe;stat.mean</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>e_[Fe/H]mean</name><description>? Mean value uncertainty of the cluster [Fe/H] (FeH_mean_err)</description><ucd>stat.error;phys.abund.Fe</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>s_[Fe/H]</name><description>? Standard deviation of the cluster [Fe/H] (FeH_std)</description><ucd>stat.stdev;phys.abund.Fe</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>LX</name><description>? X component of the Galactic angular momentum (LX)</description><unit>kpc.km/s</unit><ucd>pos.cartesian.x</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>LY</name><description>? Y component of the Galactic angular momentum (LY)</description><unit>kpc.km/s</unit><ucd>pos.cartesian.y</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>LZ</name><description>? Z component of the Galactic angular momentum (LZ)</description><unit>kpc.km/s</unit><ucd>pos.cartesian.z</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>ULSR</name><description>? U velocity in the local standard of rest (ULSR)</description><unit>km/s</unit><ucd>phys.veloc;pos.cartesian.x</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>VLSR</name><description>? V velocity in the local standard of rest (VLSR)</description><unit>km/s</unit><ucd>phys.veloc;pos.cartesian.y</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>WLSR</name><description>? W velocity in the local standard of rest (WLSR)</description><unit>km/s</unit><ucd>phys.veloc;pos.cartesian.z</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>ZGC</name><description>? Galactic Cartesian coordinate Z (ZGC)</description><unit>kpc</unit><ucd>pos.cartesian.z;pos.galactic</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>RGC</name><description>? Galactocentric distance (RGC)</description><unit>kpc</unit><ucd>pos.distance;pos.galactocentric</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>Peri</name><description>? Pericenter distance from the Galactic center (Pericenter)</description><unit>pc</unit><ucd>pos.distance</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>Apo</name><description>? Apocenter distance from the Galactic center (Apocenter)</description><unit>pc</unit><ucd>pos.distance</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>Energy</name><description>? Total dynamical energy of the cluster (Energy)</description><unit>km**2.s**-2</unit><ucd>phys.energy</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>ecc</name><description>? Eccentricity of the cluster orbit (ecc)</description><ucd>src.orbital.eccentricity</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>_RA</name><description>Right Ascension (J2000) from SIMBAD (not part of the original data)</description><unit>deg</unit><ucd>pos.eq.ra;meta.main</ucd></column><column><name>_DE</name><description>Declination (J2000) from SIMBAD (not part of the original data)</description><unit>deg</unit><ucd>pos.eq.dec;meta.main</ucd></column></table><table><name>J/A+A/668/A4/memberl</name><description>Member star parameters</description><column><name>Simbad</name><description>Simbad column added by the CDS</description><ucd>meta.ref.url</ucd><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column><column><name>e_logg</name><description>? Surface gravity uncertainty (logg_err)</description><unit>log(cm.s**-2)</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>recno</name><description>Record number assigned by the VizieR team. Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>GaiaDR2</name><description>Gaia DR2 source_id (GaiaDR2)</description><ucd>meta.id;meta.main</ucd></column><column><name>Gmag</name><description>G magnitude in Gaia DR2 (phot_g_mean_mag)</description><unit>mag</unit><ucd>phot.mag;em.opt</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>BPmag</name><description>? BP magnitude in Gaia DR2 (phot_bp_mean_mag)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>RPmag</name><description>? RP magnitude in Gaia DR2 (phot_rp_mean_mag)</description><unit>mag</unit><ucd>phot.mag;em.opt.R</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>Pmemb</name><description>Membership probability from Cantat-Gaudin et al. (2020, Cat. J/A+A/640/A1) (proba)</description><ucd>stat.probability</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Cluster</name><description>Cluster name (Cluster)</description><ucd>meta.id.parent</ucd><dataType xsi:type="vs:VOTableType" arraysize="17*">char</dataType></column><column><name>Flag</name><description>? Quality control flag (flag)</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>Obsid</name><description>LAMOST DR8 obsid (obsid)</description><ucd>meta.id;obs</ucd><dataType xsi:type="vs:VOTableType">long</dataType></column><column><name>Obs.date</name><description>LAMOST observation date (obsdate)</description><ucd>time.epoch;obs</ucd><flag>nullable</flag></column><column><name>RAJ2000</name><description>Object right ascension in LAMOST DR8 (J2000) (ra_obs)</description><unit>deg</unit><ucd>pos.eq.ra;meta.main</ucd></column><column><name>DEJ2000</name><description>Object declination in LAMOST DR8 (J2000) (dec_obs)</description><unit>deg</unit><ucd>pos.eq.dec;meta.main</ucd></column><column><name>Teff</name><description>Effective temperature (teff)</description><unit>K</unit><ucd>phys.temperature.effective</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_Teff</name><description>? effective temperature uncertainty (teff_err)</description><unit>K</unit><ucd>stat.error;phys.temperature.effective</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>logg</name><description>Surface gravity (logg)</description><unit>log(cm.s**-2)</unit><ucd>phys.gravity</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>[Fe/H]</name><description>Iron abundance (feh)</description><ucd>phys.abund.Fe</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_[Fe/H]</name><description>? Iron abundance uncertainty (feh_err)</description><ucd>stat.error;phys.abund.Fe</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>RV</name><description>Radial velocity (rv)</description><unit>km/s</unit><ucd>phys.veloc;pos.heliocentric</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_RV</name><description>Radial velocity uncertainty (rv_err)</description><unit>km/s</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column></table></schema></tableset></ri:Resource>