Show simple item record

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, Elisabeth
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, J.E.
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.accessioned2021-04-14T15:29:43Z
dc.date.available2021-04-14T15:29:43Z
dc.date.issued2019-02-17
dc.identifier.citationJ D Henshaw, A Ginsburg, T J Haworth, S N Longmore, J M D Kruijssen, E A C Mills, V Sokolov, D L Walker, A T Barnes, Y Contreras, J Bally, C Battersby, H Beuther, N Butterfield, J E Dale, T Henning, J M Jackson, J Kauffmann, T Pillai, S Ragan, M Riener, Q Zhang, ‘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, Volume 485, Issue 2, May 2019, Pages 2457–2485, https://doi.org/10.1093/mnras/stz471en_US
dc.identifier.urihttp://hdl.handle.net/1808/31595
dc.descriptionThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.en_US
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 that 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, σvlos,1D=4.4±2.1 km s−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 σvlos,1D/σvpos,1D∼1.2±0.3⁠. 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 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_US
dc.publisherRoyal Astronomical Societyen_US
dc.rights© 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.en_US
dc.subjectTurbulenceen_US
dc.subjectStars: formationen_US
dc.subjectISM: cloudsen_US
dc.subjectISM: kinematics and dynamicsen_US
dc.subjectISM: structureen_US
dc.subjectGalaxy: centreen_US
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_US
dc.typeArticleen_US
kusw.kuauthorMills, Elisabeth
kusw.kudepartmentPhysics and Astronomyen_US
dc.identifier.doi10.1093/mnras/stz471en_US
dc.identifier.orcidhttps://orcid.org/0000-0001-9656-7682en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-9593-7618en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-8804-0212en_US
dc.identifier.orcidhttps://orcid.org/0000-0003-4164-5588en_US
kusw.oaversionScholarly/refereed, publisher versionen_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US
dc.rights.accessrightsopenAccessen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record