J/ApJ/884/6ivo://CDS.VizieR/J/ApJ/884/6doi:10.26093/cds/vizier.18840006CDSMcBride A.Kounkel M.2021-11-19T11:54:12Z2021-04-13T08:40:25ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsproper-motionsvisible-astronomytrigonometric-parallaxradial-velocityThe star-forming region of the Orion Nebula (ONC) is ideal to study the stellar dynamics of young stars in a clustered environment. Using Gaia DR2 we search for pre-main sequence stars with unusually high proper motions that may be representative of a dynamical ejection from unstable young triple systems or other close three-body encounters. We identify 26 candidate stars that are likely to have had such an encounter in the last 1Myr. Nine of these stars could be traced back to the densest central-most region of the ONC, the Trapezium, while five others have likely interactions with other OB-type stars in the cluster. Seven stars originate from other nearby populations within the Orion Complex that coincidentally scattered toward the ONC. A definitive point of origin cannot be identified for the remaining sources. These observations shed light on the frequency of the ejection events in young clusters.2019ApJ...884....6Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/884/6CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/AJ/113/1733 : Orion Nebula Cluster population (Hillenbrand 1997)J/AJ/119/3026 : Circumstellar disk candidates in Orion (Rebull+, 2000)J/ApJS/160/353 : Membership of the Orion nebula population (Getman+, 2005)J/AJ/129/363 : Spectroscopy in Orion Nebula Cluster (Sicilia-Aguilar+, 2005)J/ApJ/646/297 : Spitzer obs. of pre-main-sequence stars (Rebull+, 2006)J/ApJ/676/1109 : Velocities of stars in ONC (Furesz+, 2008)J/A+A/504/461 : YSOs in L1630N and L1641 (Fang+, 2009)J/ApJ/722/1092 : Optical photometry of the ONC. II. (Da Rio+, 2010)J/ApJ/748/14 : ONC population data from WFI observations (Da Rio+, 2012)J/ApJ/752/59 : Low-mass population in L1641 (Hsu+, 2012)J/AJ/144/192 : Spitzer survey of Orion A & B. I. YSO catalog (Megeath+, 2012)J/ApJS/207/5 : YSOs in LDN 1641 with Hectochelle spectra (Fang+, 2013)J/ApJ/764/114 : BVRI photometry of stars in Orion A (Hsu+, 2013)J/ApJ/768/99 : X-ray survey of YSOs in Orion A (Pillitteri+, 2013)J/ApJ/787/109 : Age estimates for NGC 2024 and ONC stars (Getman+, 2014)J/ApJ/787/108 : Age estimates for massive SFR stellar pop. (Getman+, 2014)J/ApJ/787/107 : Spatial structure of young stellar clusters. I. (Kuhn+, 2014)J/A+A/593/A7 : NH and AV Towards YSOs in the ONC (Hasenberger+, 2016)J/ApJ/821/8 : Spectroscopic binary pop. of ONC & NGC2264 (Kounkel+, 2016)J/AJ/153/188 : Spectroscopy of the foreground pop. in Orion A (Fang+, 2017)J/AJ/154/29 : Obs. of 148 young stars toward NGC 1980 (Kounkel+, 2017)J/ApJ/834/142 : Gould's Belt Distances Survey. II. OMC (Kounkel+, 2017)J/AJ/156/84 : APOGEE-2 survey of Orion Complex. II. (Kounkel+, 2018)J/AJ/156/271 : The stellar membership of the Taurus SFR (Luhman, 2018)J/A+A/620/A172 : Solar neighbourhood young stars 3D mapping (Zari+, 2018)J/A+A/622/A149 : Vienna survey in Orion. III. (Grossschedl+, 2019)J/AJ/157/109 : Stellar proper motions in ONC (Kim+, 2019)J/AJ/158/122 : Local structure & SFH of the MW (Kounkel+, 2019)J/AJ/157/196 : Close companions around young stars (Kounkel+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/884/6https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/884/6http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/884/6https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/884/6https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/884/6http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/884/6GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/884/6/table1 (Known members of the Orion A from the literature)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/884/6/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/884/6/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/884/6/table1?GETtext/xml+votable180.050000true83.6090833-5.40527780.0055555555555555565/5350 5359 5701 6/21391 21406 21425-21428 21430-21433 21435 21482 22801 22848 22850 22852https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/884/6?format=asciiOpticaldefaultJ/ApJ/884/6/table1Known members of the Orion A from the literaturee_pmRA[0.03/4.1]? Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[82.34/86.66] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-10.42/-3.41] Declination (J2000)degpos.eq.dec;meta.mainRefConfirmation reference code(s) (1)pos.framecharGaia? Gaia DR2 (I/345) source identifiermeta.id.crossnullableplx[-6/30.7]? Gaia DR2 parallaxmaspos.parallax.trigfloatnullablee_plx[0.019/3]? Uncertainty in plxmasstat.error;pos.parallaxfloatnullablepmRA[-78/360.4]? Gaia DR2 proper motion along RAmas/yrpos.pm;pos.eq.rafloatnullablepmDE[-383/85.9]? Gaia DR2 proper motion along DEmas/yrpos.pm;pos.eq.decdoublenullablee_pmDE[0.03/4.3]? Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatnullableRVel[-51.5/238]? Weighted average radial velocity (2)km/sphys.veloc;pos.heliocentricdoublenullablee_RVel[0.07/12.7]? Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatnullableFigPanel in Figure 4 identifier (the 26 high proper motion sources)meta.bib.figcharONameSimbad namemeta.id;meta.maincharOCatDisplay data from Kounkel+, 2018, J/AJ/156/84 ; Grossschedl+, 2019, J/A+A/622/A149 ; Megeath+, 2012, J/AJ/144/192 and Da Rio+, 2012, J/ApJ/748/14 within 2"meta.ref.urlintnullable