dc.contributor.author Dzib, Sergio A. dc.contributor.author Loinard, Laurent dc.contributor.author Rodríguez, Luis F. dc.contributor.author Gómez, Laura dc.contributor.author Forbrich, Jan dc.contributor.author Menten, Karl M. dc.contributor.author Kounkel, Marina A. dc.contributor.author Mioduszewski, Amy J. dc.contributor.author Hartmann, Lee dc.contributor.author Tobin, John J. dc.contributor.author Rivera, Juana L. dc.date.accessioned 2017-05-26T10:26:37Z dc.date.available 2017-05-26T10:26:37Z dc.date.issued 2017-01-10 dc.identifier.citation Dzib , S A , Loinard , L , Rodríguez , L F , Gómez , L , Forbrich , J , Menten , K M , Kounkel , M A , Mioduszewski , A J , Hartmann , L , Tobin , J J & Rivera , J L 2017 , ' Radio Measurements of the stellar proper motions in the core of the Orion Nebula Cluster ' , The Astrophysical Journal , vol. 834 , no. 2 . https://doi.org/10.3847/1538-4357/834/2/139 dc.identifier.issn 0004-637X dc.identifier.other PURE: 11212599 dc.identifier.other PURE UUID: ad5e15a2-5800-4b36-b168-2bf947507295 dc.identifier.other ArXiv: http://arxiv.org/abs/1611.03767v1 dc.identifier.other Scopus: 85010049850 dc.identifier.other ORCID: /0000-0001-8694-4966/work/62751231 dc.identifier.uri http://hdl.handle.net/2299/18228 dc.description Sergio A. Dzib, et al, 'RADIO MEASUREMENTS OF THE STELLAR PROPER MOTIONS IN THE CORE OF THE ORION NEBULA CLUSTER', The Astrophysical Journal, Vol. 834(2), 10 pp, January 2017. doi:10.3847/1538-4357/834/2/139 © 2017. The American Astronomical Society. All rights reserved. dc.description.abstract Using multi-epoch VLA observations, covering a time baseline of 29.1 years, we have measured the proper motions of 88 young stars with compact radio emission in the core of the Orion Nebula Cluster (ONC) and the neighboring BN/KL region. Our work increases the number of young stars with measured proper motion at radio frequencies by a factor of 2.5 and enables us to perform a better statistical analysis of the kinematics of the region than was previously possible. Most stars (79 out of 88) have proper motions consistent with a Gaussian distribution centered on $\overline{\mu_{\alpha}\cos{\delta}}=1.07\pm0.09\quad{\rm mas\,yr^{-1}}$, and $\overline{\mu_{\delta}}=-0.84\pm0.16\quad{\rm mas\,yr^{-1}}$, with velocity dispersions of $\sigma_{\alpha}=1.08\pm0.07\quad{\rm mas\,\,yr^{-1}},$ $\sigma_{\delta}=1.27\pm0.15\quad{\rm mas\,\,yr^{-1}}$. We looked for organized movements of these stars but found no clear indication of radial expansion/contraction or rotation. The remaining nine stars in our sample show peculiar proper motions that differ from the mean proper motions of the ONC by more than 3-$\sigma$. One of these stars, V 1326 Ori, could have been expelled from the Orion Trapezium 7,000 years ago. Two could be related to the multi-stellar disintegration in the BN/KL region, in addition to the previously known sources BN, I and n. The others either have high uncertainties (so their anomalous proper motions are not firmly established) or could be foreground objects. en dc.format.extent 10 dc.language.iso eng dc.relation.ispartof The Astrophysical Journal dc.subject astrometry dc.subject radiation mechanisms: non-thermal dc.subject radiation mechanisms: thermal dc.subject radio continuum: stars dc.subject techniques: interferometric dc.title Radio Measurements of the stellar proper motions in the core of the Orion Nebula Cluster en dc.contributor.institution School of Physics, Astronomy and Mathematics dc.contributor.institution Centre for Astrophysics Research dc.description.status Peer reviewed rioxxterms.version VoR rioxxterms.versionofrecord https://doi.org/10.3847/1538-4357/834/2/139 rioxxterms.type Journal Article/Review herts.preservation.rarelyaccessed true
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