J/ApJ/917/21ivo://CDS.VizieR/J/ApJ/917/21doi:10.26093/cds/vizier.19170021CDSSwiggum C.D'Onghia E.Alves J.Grossschedl J.Foley M.Zucker C.,Meingast S.Chen B.Goodman A.2023-03-16T08:20:04Z2023-02-17T10:42:56ZCDS support team

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

cds-question@unistra.frradial-velocityproper-motionsstar-forming-regionsstellar-agesstellar-associationsvisible-astronomyWe present a phase-space study of two stellar groups located at the core of the Orion Complex: Briceno-1 and Orion Belt Population-near (OBP-near). We identify the groups with the unsupervised clustering algorithm, Shared Nearest Neighbor (SNN), which previously identified 12 new stellar substructures in the Orion Complex. For each of the two groups, we derive the 3D space motions of individual stars using Gaia-EDR3 proper motions supplemented by radial velocities from Gaia-DR2, APOGEE-2, and GALAH DR3. We present evidence for radial expansion of the two groups from a common center. Unlike previous work, our study suggests that evidence of stellar group expansion is confined only to OBP-near and Briceno-1, whereas the rest of the groups in the complex show more complicated motions. Interestingly, the stars in the two groups lie at the center of a dust shell, as revealed via an extant 3D dust map. The exact mechanism that produces such coherent motions remains unclear, while the observed radial expansion and dust shell suggest that massive stellar feedback could have influenced the star formation history of these groups.2021ApJ...917...21Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/917/21CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)J/A+A/289/101 : Orion OB1 association. I. (Brown+, 1994)J/AJ/131/1574 : Infrared photometry of IC348 members (Lada+, 2006)J/ApJ/661/1119 : Spectroscopy in the 25 Ori group (Briceno+, 2007)J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)J/MNRAS/424/1925 : Spectrocopic Binarity of O and B type stars (Chini+, 2012)J/A+A/584/A26 : Cosmography of OB stars in solar neighbourhood (Bouy+, 2015)J/AJ/153/188 : Spectroscopy of the foreground pop. in Orion A (Fang+, 2017)J/A+A/608/A148 : Stellar populations towards Orion with GaiaDR1 (Zari+, 2017)J/ApJS/236/27 : APOGEE-2 survey of Orion Complex (OSFC). I. (Cottle+, 2018)J/A+A/619/A106 : 3D shape of Orion A from Gaia DR2 (Grossschedl+, 2018)J/AJ/156/84 : APOGEE-2 survey of Orion Complex. II. (Kounkel+, 2018)J/A+A/626/A17 : Young pop. in Vela-Puppis region (Cantat-Gaudin+, 2019)J/A+A/622/A149 : Vienna survey in Orion. III. (Grossschedl+, 2019)J/A+A/631/A166 : Members of 5 cluster in Ori OB1a association (Kos+, 2019)J/ApJ/870/32 : Kinematics in young star clusters & assoc. (Kuhn+, 2019)J/MNRAS/486/2477 : Catalogue of members of NGC 6530 (Wright+, 2019)J/ApJ/899/128 : Members of NGC7000/IC5070 Complex (Kuhn+, 2020)J/MNRAS/495/663 : Gaia DR2 OB associations (Ward+, 2020)J/A+A/633/A51 : Distances to molecular clouds in SFR (Zucker+, 2020)J/MNRAS/506/150 : The GALAH+ Survey DR3 (Buder+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/917/21https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/917/21http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/917/21https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/917/21https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/917/21http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/917/21GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/917/21/table2 (Shared Nearest Neighbor (SNN) catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/917/21/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/917/21/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/917/21/table2?GETtext/xml+votable180.050000true81.4062510612282.42031748877840.0055555555555555564/1339 1342 1427-1428 1430 5/5323 5349 5351 5362 5699 5702-5703 5724 5726-5727 5745 5748-5749 5920-5921 5923 5926 5929 5931 5934 6/21223 21228 21240-21241 21243 21285 21287 21304 21306-21307 21389 21393 21395 21400 21402-21403 21415 21422 21440 21442 21454-21455 21488 21490 21496 21499 22609-22611 22613-22615 22620-22622 22785-22788 22790-22793 22801 22804-22805 22820 22829 22831 22864 22866 22872-22874 22876 22902 22928 22933 22976-22977 23000-23001 23589 23591-23592 23594 23597 23599 23603 23688 23691 23696-23698 23700 23702 23712-23713 23715 23721-23722 23728-23730 23732 23734 24069https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/917/21?format=asciiOpticaldefaultJ/ApJ/917/21/table1Summary of Shared Nearest Neighbor (SNN) groupsNameName of the groupmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGroup[1/24] Original SNN group label assigned by Chen+ (2020A&A...643A.114C)meta.idintprimaryStab[41/383] Stability score from SNNstat.paramintNs[85/909] Number of stars in groupmeta.numberintAge[3.1/22.5] Age of groupMyrtime.agefloate_Age[1.5/6.9] Lower uncertainty on AgeMyrstat.error;time.agefloatE_Age[0.9/9.8] Upper uncertainty on AgeMyrstat.error;stat.maxfloatAv[0.2/0.6] Extinction of groupmagphys.absorption;pos.lgfloatDR2p[58/84.3] Percent of group's stars from Chen+ (2020A&A...643A.114C) that are coincident with present work's stellar membership%meta.notefloatRAdeg[78.5/88] Average right ascensiondegpos.eq.ra;meta.maine_RAdeg[0.4/1.5] RAdeg 1{sigma} uncertaintydegstat.error;pos.eq.rafloatDEdeg[-8.1/9.7] Average declinationdegpos.eq.dec;meta.maine_DEdeg[0.6/2.2] DEdeg 1{sigma} uncertaintydegstat.error;pos.eq.decfloatDist[285/446] Average distancepcpos.distancefloate_Dist[11/31] Dist 1{sigma} uncertaintypcstat.errorfloatpmRA[-3.3/2] Average pmRAmas/yrpos.pm;pos.eq.rafloate_pmRA[0.2/0.4] pmRA 1{sigma} uncertaintymas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-3/0.8] Average pmDEmas/yrpos.pm;pos.eq.decfloate_pmDE[0.2/0.3] pmDE 1{sigma} uncertaintymas/yrstat.error;pos.pm;pos.eq.decfloatHRV[14/33] Average heliocentric RVkm/sphys.veloc;pos.heliocentricfloate_HRV[3/77] HRV 1{sigma} uncertaintykm/sstat.errorfloatNrv[2/197] Number of available RVs from Gaia DR2, APOGEE-2, and GALAH DR3meta.numberintJ/ApJ/917/21/table2Shared Nearest Neighbor (SNN) catalogGroup[1/24] Shared nearest neighbor (SNN) label (as in Table 1)meta.id.parentinte_RVel3[0.3/3]? Uncertainty in RVel3km/sstat.errorfloatnullableProb[0.02/1] SNN probabilitystat.probabilityfloatSimbadSimbad column added by the CDSmeta.ref.urlchar_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.decnullableindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Gaia EDR3 source IDmeta.id;meta.mainRA_ICRS[75.18/89.88] Right Ascension, Gaia DR3 (ICRS) at Epoch=2016.0degpos.eq.ra;meta.maine_RA_ICRS[0.007/1.11] Uncertainty in RAdegdegstat.error;pos.eq.rafloatDE_ICRS[-14.3/13.1] Declination, Gaia DR3 (ICRS) at Epoch=2016.0degpos.eq.dec;meta.maine_DE_ICRS[0.006/1.1] Uncertainty in DEdegdegstat.error;pos.eq.decdoublePlx[2/4.1] Parallax, Gaia DR3maspos.parallaxfloate_Plx[0.01/0.7] Uncertainty in Plxmasstat.error;pos.parallaxfloatpmRA[-3.84/2.5] Proper motion in RA, Gaia DR3mas/yrpos.pm;pos.eq.rafloate_pmRA[0.01/1.1] Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-3.5/1.5] Proper motion in DE, Gaia DR3mas/yrpos.pm;pos.eq.decfloate_pmDE[0.008/1.1] Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatRVel1[-24.8/52.8]? Gaia DR2 radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RVel1[0.27/20]? Uncertainty in RVel1km/sstat.errorfloatnullableRVel2[-22/633]? APOGEE-2 radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RVel2[0.01/5.7]? Uncertainty in RVel2km/sstat.errorfloatnullableRVel3[3.6/91.3]? GALAH DR3 radial velocitykm/sphys.veloc;pos.heliocentricfloatnullable