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dc.contributor.authorHenshaw, J. D.
dc.contributor.authorGinsburg, A.
dc.contributor.authorHaworth, T. J.
dc.contributor.authorLongmore, S. N.
dc.contributor.authorKruijssen, J. M. D.
dc.contributor.authorMills, E. A. C.
dc.contributor.authorSokolov, V.
dc.contributor.authorWalker, D. L.
dc.contributor.authorBarnes, A. T.
dc.contributor.authorContreras, Y.
dc.contributor.authorBally, J.
dc.contributor.authorBattersby, C.
dc.contributor.authorBeuther, H.
dc.contributor.authorButterfield, N.
dc.contributor.authorDale, James
dc.contributor.authorHenning, T.
dc.contributor.authorJackson, J. M.
dc.contributor.authorKauffmann, J.
dc.contributor.authorPillai, T.
dc.contributor.authorRagan, S.
dc.contributor.authorRiener, M.
dc.contributor.authorZhang, Q.
dc.date.accessioned2019-05-14T14:05:19Z
dc.date.available2019-05-14T14:05:19Z
dc.date.issued2019-05-01
dc.identifier.citationHenshaw , J D , Ginsburg , A , Haworth , T J , Longmore , S N , Kruijssen , J M D , Mills , E A C , Sokolov , V , Walker , D L , Barnes , A T , Contreras , Y , Bally , J , Battersby , C , Beuther , H , Butterfield , N , Dale , J , Henning , T , Jackson , J M , Kauffmann , J , Pillai , T , Ragan , S , Riener , M & Zhang , Q 2019 , ' 'The Brick' is not a brick : A comprehensive study of the structure and dynamics of the Central Molecular Zone cloud G0.253+0.016 ' , Monthly Notices of the Royal Astronomical Society , vol. 485 , no. 2 , pp. 2457–2485 . https://doi.org/10.1093/mnras/stz471
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 16711327
dc.identifier.otherPURE UUID: f7b0d855-5883-434c-a9ad-b5185b82b9bc
dc.identifier.otherArXiv: http://arxiv.org/abs/1902.02793v1
dc.identifier.urihttp://hdl.handle.net/2299/21330
dc.description© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
dc.description.abstractIn this paper we provide a comprehensive description of the internal dynamics of G0.253+0.016 (a.k.a. 'the Brick'); one of the most massive and dense molecular clouds in the Galaxy to lack signatures of widespread star formation. As a potential host to a future generation of high-mass stars, understanding largely quiescent molecular clouds like G0.253+0.016 is of critical importance. In this paper, we reanalyse Atacama Large Millimeter Array cycle 0 HNCO $J=4(0,4)-3(0,3)$ data at 3 mm, using two new pieces of software which we make available to the community. First, scousepy, a Python implementation of the spectral line fitting algorithm scouse. Secondly, acorns (Agglomerative Clustering for ORganising Nested Structures), a hierarchical n-dimensional clustering algorithm designed for use with discrete spectroscopic data. Together, these tools provide an unbiased measurement of the line of sight velocity dispersion in this cloud, $\sigma_{v_{los}, {\rm 1D}}=4.4\pm2.1$ kms$^{-1}$, which is somewhat larger than predicted by velocity dispersion-size relations for the Central Molecular Zone (CMZ). The dispersion of centroid velocities in the plane of the sky are comparable, yielding $\sigma_{v_{los}, {\rm 1D}}/\sigma_{v_{pos}, {\rm 1D}}\sim1.2\pm0.3$. This isotropy may indicate that the line-of-sight extent of the cloud is approximately equivalent to that in the plane of the sky. Combining our kinematic decomposition with radiative transfer modelling we conclude that G0.253+0.016 is not a single, coherent, and centrally-condensed molecular cloud; 'the Brick' is not a \emph{brick}. Instead, G0.253+0.016 is a dynamically complex and hierarchically-structured molecular cloud whose morphology is consistent with the influence of the orbital dynamics and shear in the CMZ.en
dc.format.extent29
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.subjectGalaxy: centre
dc.subjectISM: clouds
dc.subjectISM: kinematics and dynamics
dc.subjectISM: structure
dc.subjectStars: formation
dc.subjectTurbulence
dc.subjectAstronomy and Astrophysics
dc.subjectSpace and Planetary Science
dc.title'The Brick' is not a brick : A comprehensive study of the structure and dynamics of the Central Molecular Zone cloud G0.253+0.016en
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=85063719666&partnerID=8YFLogxK
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2019-05-01
rioxxterms.versionAM
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/stz471
rioxxterms.licenseref.uriOther
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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