Show simple item record

dc.contributor.authorDzib, Sergio A.
dc.contributor.authorLoinard, Laurent
dc.contributor.authorRodríguez, Luis F.
dc.contributor.authorGómez, Laura
dc.contributor.authorForbrich, Jan
dc.contributor.authorMenten, Karl M.
dc.contributor.authorKounkel, Marina A.
dc.contributor.authorMioduszewski, Amy J.
dc.contributor.authorHartmann, Lee
dc.contributor.authorTobin, John J.
dc.contributor.authorRivera, Juana L.
dc.date.accessioned2017-05-26T10:26:37Z
dc.date.available2017-05-26T10:26:37Z
dc.date.issued2017-01-10
dc.identifier.citationDzib , 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.issn0004-637X
dc.identifier.otherPURE: 11212599
dc.identifier.otherPURE UUID: ad5e15a2-5800-4b36-b168-2bf947507295
dc.identifier.otherArXiv: http://arxiv.org/abs/1611.03767v1
dc.identifier.otherScopus: 85010049850
dc.identifier.otherORCID: /0000-0001-8694-4966/work/62751231
dc.identifier.urihttp://hdl.handle.net/2299/18228
dc.descriptionSergio 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.abstractUsing 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.extent10
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.subjectastrometry
dc.subjectradiation mechanisms: non-thermal
dc.subjectradiation mechanisms: thermal
dc.subjectradio continuum: stars
dc.subjecttechniques: interferometric
dc.titleRadio Measurements of the stellar proper motions in the core of the Orion Nebula Clusteren
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.3847/1538-4357/834/2/139
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record