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dc.contributor.authorYin, Charles
dc.contributor.authorPriestley, Felix D
dc.contributor.authorWurster, James
dc.date.accessioned2021-05-07T15:30:05Z
dc.date.available2021-05-07T15:30:05Z
dc.date.issued2021-06
dc.identifier.citationYin , C , Priestley , F D & Wurster , J 2021 , ' Investigating the role of magnetic fields in star formation using molecular line profiles ' , Monthly Notices of the Royal Astronomical Society , vol. 504 , no. 2 , pp. 2381–2389 . https://doi.org/10.1093/mnras/stab1039en
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 274064634
dc.identifier.otherPURE UUID: 159380e8-9354-4db5-b3c1-bb58748c4b62
dc.identifier.otherJisc: 4ece05823ce34f6ab8624d24a83192a6
dc.identifier.otherORCID: /0000-0003-0688-5332/work/93515159
dc.identifier.otherWOS: 000659453800056
dc.identifier.otherScopus: 85107911907
dc.identifier.urihttp://hdl.handle.net/10023/23132
dc.descriptionFDP is funded by the Science and Technology Facilities Council.en
dc.description.abstractDetermining the importance of magnetic fields in star-forming environments is hampered by the difficulty of accurately measuring both field strength and gas properties in molecular clouds. We post-process three-dimensional non-ideal magnetohydrodynamic simulations of pre-stellar cores with a time-dependent chemical network, and use radiative transfer modelling to calculate self-consistent molecular line profiles. Varying the initial mass-to-flux ratio from subcritical to supercritical results in significant changes to both the intensity and shape of several observationally important molecular lines. We identify the peak intensity ratio of N2H+ to CS lines, and the CS J = 2–1 blue-to-red peak intensity ratio, as promising diagnostics of the initial mass-to-flux ratio, with N2H+/CS values of >0.6 (<0.2) and CS blue/red values of <3 (>5) indicating subcritical (supercritical) collapse. These criteria suggest that, despite presently being magnetically supercritical, L1498 formed from subcritical initial conditions.
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.rightsCopyright © 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at https://doi.org/10.1093/mnras/stab1039.en
dc.subjectAstrochemistryen
dc.subjectMHDen
dc.subjectStars: formationen
dc.subjectISM: magnetic fieldsen
dc.subjectISM: moleculesen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectNDASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleInvestigating the role of magnetic fields in star formation using molecular line profilesen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.identifier.doihttps://doi.org/10.1093/mnras/stab1039
dc.description.statusPeer revieweden


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