J/MNRAS/487/2977ivo://CDS.VizieR/J/MNRAS/487/2977doi:10.26093/cds/vizier.74872977CDSGetman K.V.Feigelson E.D.Kuhn M.A.Garmire G.P.2024-08-19T20:18:57Z2023-01-16T14:45:32ZCDS support team

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

cds-question@unistra.frearly-type-starspre-main-sequence-starsopen-star-clustersvisible-astronomytrigonometric-parallaxproper-motionsapparent-magnituderadial-velocitystellar-agesinfrared-astronomyx-ray-sourcesThis work extends previous kinematic studies of young stars in the head of the Orion A cloud (OMC-1/2/3/4/5). It is based on large samples of infrared, optical, and X-ray selected pre-main-sequence stars with reliable radial velocities and Gaia-derived parallaxes and proper motions. Stellar kinematic groups are identified assuming they mimic the motion of their parental gas. Several groups are found to have peculiar kinematics: the NGC 1977 cluster and two stellar groups in the extended Orion nebula (EON) cavity are caught in the act of departing their birthplaces. The abnormal motion of NGC 1977 may have been caused by a global hierarchical cloud collapse, feedback by massive Ori OB1ab stars, supersonic turbulence, cloud-cloud collision, and/or slingshot effect; the former two models are favoured by us. EON groups might have inherited anomalous motions of their parental cloudlets due to small-scale 'rocket effects' from nearby OB stars. We also identify sparse stellar groups to the east and west of Orion A that are drifting from the central region, possibly a slowly expanding halo of the Orion nebula cluster. We confirm previously reported findings of varying line-of-sight distances to different parts of the cloud's Head with associated differences in gas velocity. 3D movies of star kinematics show contraction of the groups of stars in OMC-1 and global contraction of OMC-123 stars. Overall, the head of Orion A region exhibits complex motions consistent with theoretical models involving hierarchical gravitational collapse in (possibly turbulent) clouds with OB stellar feedback.2019MNRAS.487.2977Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/487/2977CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/ApJS/229/28 : SFiNCs: X-ray, IR and membership catalogs (Getman+, 2017)J/ApJS/209/32 : Probable young stars in the MYStIX project (Broos+, 2013)J/ApJ/676/1109 : Velocities of stars in the Orion Nebula ClusterJ/ApJ/697/1103 : Kinematics of Orion Nebula Cluster (Tobin+, 2009)J/ApJ/748/14 : ONC population data from WFI observations (Da Rio+, 2012)J/ApJ/818/59 : IN-SYNC. IV. YSOs in Orion A (Da Rio+, 2016)J/AJ/144/192 : Spitzer survey of Orion A and B. I. YSO catalogJ/A+A/587/A153 : VISION I. VISTA Orion A Survey (Meingast+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/487/2977https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/487/2977http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/487/2977https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/487/2977https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/487/2977http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/487/2977GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/487/2977/tablea1 (Gaia-selected catalogue of young stars in Orion A; Gaia properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/487/2977/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/487/2977/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/487/2977/tablea1?GETtext/xml+votable180.050000true85.55883194-9.939013060.005555555555555556Cone search capability for table J/MNRAS/487/2977/tablea3 (Catalogue of young stars with radial velocities in Orion A)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/487/2977/tablea3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/487/2977/tablea3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/487/2977/tablea3?GETtext/xml+votable180.050000true85.65428194-9.993823060.0055555555555555566/21400 21402-21403 21406 21425 21427-21428 21430 21433 21435-21436 21438-21439 22804-22805 22807 22848 228501.143914381504295e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/487/2977?format=asciiX-rayOpticalInfrareddefaultJ/MNRAS/487/2977/tablea1Gaia-selected catalogue of young stars in Orion A; Gaia propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source identifiermeta.id;meta.mainRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainplxParallaxmaspos.parallax.trigfloate_plxError on plx (1)masstat.error;pos.parallaxfloatpmRAProper motion in right ascensionmas/yrpos.pm;pos.eq.rafloatpmDEProper motion in declinationmas/yrpos.pm;pos.eq.decfloate_pmDEError on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatGmagGaia DR2 G-band magnitudemagphot.mag;em.optfloate_GmagError on Gmagmagstat.error;phot.magfloatFEC[0/1] Flag indicating Gaia photometric BP/RP flux excess (2)meta.codeintGaiaDisplay Gaia DR2 data (Cat. I/345)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchare_pmRAError on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatJ/MNRAS/487/2977/tablea2Gaia-selected catalogue of young stars in Orion A; Other propertiesCat1[0/1] Flag indicating the presence of the Gaia source in the MYStIX/SFiNCs catalogues (G1)meta.codeintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source identifiermeta.id;meta.mainCat2[0/1] Flag indicating the presence of the Gaia source in Furesz et al. (2008) catalogue (G2)meta.codeintCat3[0/1] Flag indicating the presence of the Gaia source in Tobin et al. (2009) catalogue (G3)meta.codeintCat4[0/1] Flag indicating the presence of the Gaia source in Da Rio et al. (2012) catalogue (G4)meta.codeintCat5[0/1] Flag indicating the presence of the Gaia source in Da Rio et al. (2016) catalogue (G5)meta.codeintCat6[0/1] Flag indicating the presence of the Gaia source in Megeath et al. (2012) catalogue (G6)meta.codeintJmag? J-band magnitude from Meingast et al. (2016A&A...587A.153M, Cat. J/A+A/587/A153)magphot.mag;em.IR.Jfloatnullablee_Jmag? Error on Jmagmagstat.error;phot.magfloatnullableHmag? H-band magnitude from Meingast et al. (2016A&A...587A.153M, Cat. J/A+A/587/A153)magphot.mag;em.IR.Hfloatnullablee_Hmag? Error on Hmagmagstat.error;phot.magfloatnullableAv? Visual source extinction based on the extinction scale from Da Rio et al. (2016ApJ...818...59D, Cat. J/ApJ/818/59) (1)magphys.absorptionfloatnullableAgeD16? Stellar age estimate from Da Rio et al. (2016ApJ...818...59D, Cat. J/ApJ/818/59) (2)Myrtime.agefloatnullableAgeJX? Age from MYStIX (Getman et al. 2014ApJ...787..108G, Cat. J/ApJ/787/108) and SFiNCs (Getman et al. 2017ApJS..229...28G, Cat. J/ApJS/229/28) (2)Myrtime.agefloatnullablealpha? Apparent MIR spectral energy distribution (SED) slope measured in the Spitzer-IRAC wavelength range from 3.6 to 8.0{mu}m (3)spect.indexfloatnullablee_alpha? Error on alphastat.error;pos.eq.rafloatnullableMember[0/5] Membership flag (G7)meta.code.errorintJ/MNRAS/487/2977/tablea3Catalogue of young stars with radial velocities in Orion AJmag? J-band magnitude from Meingast et al. (2016A&A...587A.153M, Cat. J/A+A/587/A153)magphot.mag;em.IR.JfloatnullableHmag? H-band magnitude from Meingast et al. (2016A&A...587A.153M, Cat. J/A+A/587/A153)magphot.mag;em.IR.Hfloatnullablee_Hmag? Error on Hmagmagstat.error;phot.magfloatnullableMember[0/5] Membership flag (G7)meta.code.errorintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainCat1[0/1] Flag indicating the presence of the source in the MYStIX/SFiNCs catalogues (G1)meta.codeintCat2[0/1] Flag indicating the presence of the source in Furesz et al. (2008) catalogue (G2)meta.codeintCat3[0/1] Flag indicating the presence of the source in Tobin et al. (2009) catalogue (G3)meta.codeintCat4[0/1] Flag indicating the presence of the source in Da Rio et al. (2012) catalogue (G4)meta.codeintCat5[0/1] Flag indicating the presence of the source in Da Rio et al. (2016) catalogue (G5)meta.codeintCat6[0/1] Flag indicating the presence of the source in Megeath et al. (2012) catalogue (G6)meta.codeintCat7[0/1] Flag indicating the presence of the source in the Gaia catalog listed in Tables A1 and A2 (1)meta.codeintRVK18? Average heliocentric radial velocity from Kounkel et al. (2018AJ....156...84K, Cat. J/AJ/156/84)km/sspect.dopplerVeloc;pos.heliocentric;stat.meanfloatnullablee_RVK18? Error on RVK18km/sstat.errorfloatnullableRVT09? Average heliocentric radial velocity from Tobin et al. (2009ApJ...697.1103T, Cat. J/ApJ/697/1103) (2)km/sspect.dopplerVeloc;pos.heliocentric;stat.meanfloatnullablee_RVT09? Error on RVT09km/sstat.errorfloatnullableMult? [1/2] Spectroscopic binary flag, multiplicity from Tobin et al. (2009ApJ...697.1103T, Cat. J/ApJ/697/1103)meta.code.errorintnullablee_Jmag? Error on Jmagmagstat.error;phot.magfloatnullable