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<ri:Resource created="2021-08-17T07:57:37Z" status="active" updated="2025-06-13T15:25:00Z" 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>3794 open clusters parameters</title><shortName>J/A+A/652/A102</shortName><identifier>ivo://CDS.VizieR/J/A+A/652/A102</identifier><altIdentifier>doi:10.26093/cds/vizier.36520102</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Hao C.J.</name></creator><creator><name>Xu Y.</name></creator><creator><name>Hou L.G.</name></creator><creator><name>Bian S.B.</name></creator><creator><name>Li J.J.</name></creator><creator><name>Wu Z.Y.</name></creator><creator><name>He Z.H.</name></creator><creator><name>Li Y.J.,Liu D.J.</name></creator><date role="Updated">2021-08-17T07:01:50Z</date><date role="Created">2021-08-17T07:57:37Z</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>visible-astronomy</subject><subject>trigonometric-parallax</subject><subject>proper-motions</subject><subject>radial-velocity</subject><description>The structure and evolution of the spiral arms of the Milky Way are basic but long-standing questions in astronomy. Especially the lifetime of spiral arms, it is still a puzzle and has not been well constrained from observations. In this work, we aim to inspect these issues by using a large catalogue of open clusters. We have compiled a catalogue of 3794 OCs based on Gaia EDR3. A majority of them have accurately determined parallaxes, proper motions and radial velocities. The age parameters for these OCs are also collected or calculated. Then, we analysed their distributions on the Galactic plane, the kinematic properties, the vertical distributions and the regressed properties of subsamples of OCs in order to better understand the nearby spiral structure and its evolution. We find evidence that the nearby spiral arms are compatible with a long lived pattern and might have remained approximately stable for the past 80 million years. Especially, the Local Arm where our Sun is currently located in, is also suggested to be long-lived in nature, and probable a major arm segment in the Milky Way. The evolutionary characteristics of nearby spiral arms show that the dynamic spiral mechanism might be not suitable for our Galaxy. Instead, the density wave theory is more consistent with the observational properties.</description><source format="bibcode">2021A&amp;A...652A.102H</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/652/A102</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/B/ocl">B/ocl : Optically visible open clusters and Candidates</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/558/A53">J/A+A/558/A53 : Milky Way global survey of star clusters. II.</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/568/A51">J/A+A/568/A51 : Milky Way global survey of star clusters. III.</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/581/A39">J/A+A/581/A39 : MWSC IV. 63 new open clusters (Scholz+, 2015)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/564/A79">J/A+A/564/A79 : Proper motions of open clusters from UCAC4 (Dias+, 2014)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/618/A93">J/A+A/618/A93 : Gaia DR2 open clusters in the Milky Way</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/624/A126">J/A+A/624/A126 : New open clusters in Perseus direction</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/618/A59">J/A+A/618/A59 : Gaia DR2 confirmed new nearby open clusters</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/627/A35">J/A+A/627/A35 : New open clusters in Galactic anti-centre</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/635/A45">J/A+A/635/A45 : 570 new open clusters in the Galactic disc</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJS/245/32">J/ApJS/245/32 : Newly identified star clusters in Gaia DR2 (Liu+, 2019)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/MNRAS/496/2021">J/MNRAS/496/2021 : New Galactic open clusters (Ferreira+, 2020)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/619/A155">J/A+A/619/A155 : Open cluster kinematics with Gaia DR2 (Soubiran+, 2018)</relatedResource></relationship></content><rights>https://cds.unistra.fr/vizier-org/licences_vizier.html</rights><capability><interface xsi:type="vr:WebBrowser"><accessURL use="full">https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/652/A102</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/652/A102</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/652/A102</mirrorURL></interface></capability><capability><interface 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45121 45150 45201 45203-45204 45225 45628 45747 45799 45801 45944 47115 47118 47145 47171 47234 47254 47276 47289 47301 47326 47342 47373 47621 47676 47704 47730 47748 47783 47858 47909 47911-47912 47914 47926 47955 48008 48015 48058-48059 48070 48092 48102 48114 48116 48561 48813 48834 48852 48864 48879 48888 48893 48951</spatial><footprint ivo-id="ivo://ivoa.net/std/moc">https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/652/A102?format=ascii</footprint><waveband>Optical</waveband></coverage><tableset><schema><name>default</name><table><name>J/A+A/652/A102/catalog</name><description>Parameters for 3794 clusters based on the Gaia EDR3</description><column><name>SimbadName</name><description>Simbad column added by the CDS</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="25*">char</dataType></column><column><name>e_logt</name><description>? Error of age</description><unit>log(yr)</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</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>Seq</name><description>[1/3794] Sequential number</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Cluster</name><description>Cluster name</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="17*">char</dataType></column><column><name>RA_ICRS</name><description>Mean right ascension of members (ICRS) at Ep=2016.0</description><unit>deg</unit><ucd>pos.eq.ra;meta.main</ucd></column><column><name>e_RA_ICRS</name><description>Standard deviation of right ascension</description><unit>deg</unit><ucd>stat.error;pos.eq.ra</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>DE_ICRS</name><description>Mean declination of members (ICRS) at Ep=2016.0</description><unit>deg</unit><ucd>pos.eq.dec;meta.main</ucd></column><column><name>e_DE_ICRS</name><description>Standard deviation of declination</description><unit>deg</unit><ucd>stat.error;pos.eq.dec</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>GLON</name><description>Mean Galactic longitude of members (ICRS) at Ep=2016.0</description><unit>deg</unit><ucd>pos.galactic.lon</ucd></column><column><name>GLAT</name><description>Mean Galactic latitude of members (ICRS) at Ep=2016.0</description><unit>deg</unit><ucd>pos.galactic.lat</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>plx</name><description>Mean parallax of members</description><unit>mas</unit><ucd>pos.parallax.trig</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_plx</name><description>Standard deviation of parallax of members</description><unit>mas</unit><ucd>stat.error;pos.parallax</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>u_plx</name><description>[0/1] Parallax uncertainties smaller than 10%? (1=yes, 0=no)</description><ucd>meta.code.error;pos.parallax</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>pmRA*</name><description>Mean proper motion along RA*cosDE of members</description><unit>mas/yr</unit><ucd>pos.pm;pos.eq.ra</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_pmRA*</name><description>Standard deviation of pmRA*cosDE of members</description><unit>mas/yr</unit><ucd>stat.error;pos.pm;pos.eq.ra</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>pmDE</name><description>Mean proper motion along DE of members</description><unit>mas/yr</unit><ucd>pos.pm;pos.eq.dec</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_pmDE</name><description>Standard deviation of pmDE of members</description><unit>mas/yr</unit><ucd>stat.error;pos.pm;pos.eq.dec</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>logt</name><description>Logarithm of age</description><unit>log(yr)</unit><ucd>time.age</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>RV</name><description>? Mean radial velocity</description><unit>km/s</unit><ucd>phys.veloc;pos.heliocentric</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>s_RV</name><description>? Standard deviation of RV</description><unit>km/s</unit><ucd>stat.stdev</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_RV</name><description>? Uncertainty of RV</description><unit>km/s</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>o_RV</name><description>? Number of members used to compute mean radial velocity</description><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>N</name><description>Number of cluster members</description><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Ref</name><description>Reference of this OC (1)</description><ucd>meta.ref;pos.frame</ucd><dataType xsi:type="vs:VOTableType" arraysize="25*">char</dataType></column><column><name>_RA.icrs</name><description>Right ascension (ICRS) at Epoch=J2000, proper motions taken into account</description><unit>deg</unit><ucd>pos.eq.ra</ucd><flag>nullable</flag><flag>indexed</flag></column><column><name>_DE.icrs</name><description>Declination (ICRS) at Epoch=J2000, proper motions taken into account</description><unit>deg</unit><ucd>pos.eq.dec</ucd><flag>nullable</flag><flag>indexed</flag></column></table></schema></tableset></ri:Resource>