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dc.contributor.authorVargas-González, Jaime
dc.contributor.authorForbrich, Jan
dc.contributor.authorDzib, Sergio A.
dc.contributor.authorBally, John
dc.date.accessioned2021-08-24T07:45:02Z
dc.date.available2021-08-24T07:45:02Z
dc.date.issued2021-09-01
dc.identifier.citationVargas-González , J , Forbrich , J , Dzib , S A & Bally , J 2021 , ' From downtown to the outskirts: A radio survey of the Orion Nebula Cluster ' , Monthly Notices of the Royal Astronomical Society , vol. 506 , no. 3 , pp. 3169-3185 . https://doi.org/10.1093/mnras/stab1826
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 25521215
dc.identifier.otherPURE UUID: 9faefeea-2950-4f10-b188-2985ed1b5802
dc.identifier.otherArXiv: http://arxiv.org/abs/2106.13025v1
dc.identifier.otherScopus: 85112383600
dc.identifier.otherORCID: /0000-0001-8694-4966/work/99079133
dc.identifier.urihttp://hdl.handle.net/2299/25006
dc.description© The Author(s) 2021. Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.description.abstractWe present a newly enlarged census of the compact radio population towards the Orion Nebula Cluster (ONC) using high-sensitivity continuum maps (3-10 μ Jy beam-1) from a total of ∼30-h centimetre-wavelength observations over an area of ∼20 × 20 arcmin2 obtained in the C-band (4-8 GHz) with the Karl G. Jansky Very Large Array (VLA) in its high-resolution A-configuration. We thus complement our previous deep survey of the innermost areas of the ONC, now covering the field of view of the Chandra Orion Ultra-deep Project (COUP). Our catalogue contains 521 compact radio sources of which 198 are new detections. Overall, we find that 17 per cent of the (mostly stellar) COUP sources have radio counterparts, while 53 per cent of the radio sources have COUP counterparts. Most notably, the radio detection fraction of X-ray sources is higher in the inner cluster and almost constant for r > 3 arcmin (0.36 pc) from θ1 Ori C, suggesting a correlation between the radio emission mechanism of these sources and their distance from the most massive stars at the centre of the cluster, e.g. due to increased photoionisation of circumstellar discs. The combination with our previous observations 4 yr prior lead to the discovery of fast proper motions of up to ∼373 km s-1 from faint radio sources associated with ejecta of the OMC1 explosion. Finally, we search for strong radio variability. We found changes in flux density by a factor of ≲5 within our observations and a few sources with changes by a factor >10 on long time-scales of a few years.en
dc.format.extent17
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.subjectinstrumentation: high angular resolution
dc.subjectproper motions
dc.subjectradio continuum: stars
dc.subjectstars: coronae
dc.subjectstars: protostars
dc.subjectstars: variables: T Tauri, HerbigAe/Be
dc.subjectAstronomy and Astrophysics
dc.subjectSpace and Planetary Science
dc.titleFrom downtown to the outskirts: A radio survey of the Orion Nebula Clusteren
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85112383600&partnerID=8YFLogxK
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/stab1826
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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