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dc.contributor.authorKruijssen, J. M. D.
dc.contributor.authorDale, J. E.
dc.contributor.authorLongmore, S. N.
dc.contributor.authorWalker, D. L.
dc.contributor.authorHenshaw, J. D.
dc.contributor.authorJeffreson, S. M. R.
dc.contributor.authorPetkova, M. A.
dc.contributor.authorGinsburg, A.
dc.contributor.authorBarnes, A. T.
dc.contributor.authorBattersby, C. D.
dc.contributor.authorImmer, K.
dc.contributor.authorJackson, J. M.
dc.contributor.authorKeto, E. R.
dc.contributor.authorKrieger, N.
dc.contributor.authorMills, E. A. C.
dc.contributor.authorSánchez-Monge, Á.
dc.contributor.authorSchmiedeke, A.
dc.contributor.authorSuri, S. T.
dc.contributor.authorZhang, Q.
dc.date.accessioned2019-05-21T14:06:00Z
dc.date.available2019-05-21T14:06:00Z
dc.date.issued2019-04-21
dc.identifier.citationKruijssen , J M D , Dale , J E , Longmore , S N , Walker , D L , Henshaw , J D , Jeffreson , S M R , Petkova , M A , Ginsburg , A , Barnes , A T , Battersby , C D , Immer , K , Jackson , J M , Keto , E R , Krieger , N , Mills , E A C , Sánchez-Monge , Á , Schmiedeke , A , Suri , S T & Zhang , Q 2019 , ' The dynamical evolution of molecular clouds near the Galactic Centre - II. Spatial structure and kinematics of simulated clouds ' , Monthly Notices of the Royal Astronomical Society , vol. 484 , no. 4 , pp. 5734–5754 . https://doi.org/10.1093/mnras/stz381
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 16741153
dc.identifier.otherPURE UUID: a03e622a-0c32-4e3f-be85-10c780aefb09
dc.identifier.otherArXiv: http://arxiv.org/abs/1902.01860v2
dc.identifier.otherScopus: 85067081783
dc.identifier.otherORCID: /0000-0001-5252-5771/work/62751076
dc.identifier.urihttp://hdl.handle.net/2299/21342
dc.description© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
dc.description.abstractThe evolution of molecular clouds in galactic centres is thought to differ from that in galactic discs due to a significant influence of the external gravitational potential. We present a set of numerical simulations of molecular clouds orbiting on the 100-pc stream of the Central Molecular Zone (the central ∼500 pc of the Galaxy) and characterize their morphological and kinematic evolution in response to the background potential and eccentric orbital motion. We find that the clouds are shaped by strong shear and torques, by tidal and geometric deformation, and by their passage through the orbital pericentre. Within our simulations, these mechanisms control cloud sizes, aspect ratios, position angles, filamentary structure, column densities, velocity dispersions, line-of-sight velocity gradients, spin angular momenta, and kinematic complexity. By comparing these predictions to observations of clouds on the Galactic Centre 'dust ridge', we find that our simulations naturally reproduce a broad range of key observed morphological and kinematic features, which can be explained in terms of well-understood physical mechanisms. We argue that the accretion of gas clouds on to the central regions of galaxies, where the rotation curve turns over and the tidal field is fully compressive, is accompanied by transformative dynamical changes to the clouds, leading to collapse and star formation. This can generate an evolutionary progression of cloud collapse with a common starting point, which either marks the time of accretion on to the tidally compressive region or of the most recent pericentre passage. Together, these processes may naturally produce the synchronized starbursts observed in numerous (extra)galactic nuclei.en
dc.format.extent21
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.subjectGalaxies: ISM
dc.subjectGalaxy: Centre
dc.subjectISM: Clouds
dc.subjectISM: Evolution
dc.subjectISM: Kinematics and dynamics
dc.subjectStars: Formation
dc.subjectAstronomy and Astrophysics
dc.subjectSpace and Planetary Science
dc.titleThe dynamical evolution of molecular clouds near the Galactic Centre - II. Spatial structure and kinematics of simulated cloudsen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85067081783&partnerID=8YFLogxK
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2019-04-21
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/stz381
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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