The VLT MUSE NFM view of outflows and externally photoevaporating discs near the orion bar★

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dc.citation.firstpage4129en_US
dc.citation.issueNumber3en_US
dc.citation.journalTitleMonthly Notices of the Royal Astronomical Societyen_US
dc.citation.lastpage4142en_US
dc.citation.volumeNumber525en_US
dc.contributor.authorHaworth, Thomas Jen_US
dc.contributor.authorReiter, Meganen_US
dc.contributor.authorO’Dell, C Roberten_US
dc.contributor.authorZeidler, Peteren_US
dc.contributor.authorBerne, Olivieren_US
dc.contributor.authorManara, Carlo Fen_US
dc.contributor.authorBallabio, Giuliaen_US
dc.contributor.authorKim, Jinyoung Sen_US
dc.contributor.authorBally, Johnen_US
dc.contributor.authorGoicoechea, Javier Ren_US
dc.contributor.authorAru, Mari-Liisen_US
dc.contributor.authorGupta, Aashishen_US
dc.contributor.authorMiotello, Annaen_US
dc.date.accessioned2024-05-03T15:51:21Zen_US
dc.date.available2024-05-03T15:51:21Zen_US
dc.date.issued2023en_US
dc.description.abstractWe present Very Large Telescope/Multi-Unit Spectroscopic Explorer Narrow Field Mode observations of a pair of disc-bearing young stellar objects towards the Orion Bar: 203–504 and 203–506. Both of these discs are subject to external photoevaporation, where winds are launched from their outer regions due to environmental irradiation. Intriguingly, despite having projected separation from one another of only 1.65 arcsec(660 au at 400 pc), 203–504 has a classic teardrop shaped ‘proplyd’ morphology pointing towards θ2 Ori A (indicating irradiation by the EUV of that star, rather than $\rm \theta ^1$ Ori C) but 203–506 has no ionization front, indicating it is not irradiated by stellar EUV at all. However, 203–506 does show [C i] 8727 Å and [O i] 6300 Å in emission, indicating irradiation by stellar FUV. This explicitly demonstrates the importance of FUV irradiation in driving mass loss from discs. We conclude that shielding of 203–506 from EUV is most likely due to its position on the observers side of an ionized layer lying in the foreground of the Huygens Region. We demonstrate that the outflow HH 519, previously thought to be emanating from 203–504 is actually an irradiated cloud edge and identify a new compact outflow from that object approximately along our line of sight with a velocity ∼130 km s−1.en_US
dc.identifier.citationHaworth, T. J., Reiter, M., O’Dell, C. R., Zeidler, P., Berne, O., Manara, C. F., Ballabio, G., Kim, J. S., Bally, J., Goicoechea, J. R., Aru, M.-L., Gupta, A., & Miotello, A. (2023). The VLT MUSE NFM view of outflows and externally photoevaporating discs near the orion bar★. Monthly Notices of the Royal Astronomical Society, 525(3), 4129–4142. https://doi.org/10.1093/mnras/stad2581en_US
dc.identifier.digitalstad2581en_US
dc.identifier.doihttps://doi.org/10.1093/mnras/stad2581en_US
dc.identifier.urihttps://hdl.handle.net/1911/115632en_US
dc.language.isoengen_US
dc.publisherOxford University Pressen_US
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license. Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleThe VLT MUSE NFM view of outflows and externally photoevaporating discs near the orion bar★en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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