dc.contributor.author | Henshaw, J.D. | |
dc.contributor.author | Ginsburg, A. | |
dc.contributor.author | Haworth, T.J. | |
dc.contributor.author | Longmore, S.N. | |
dc.contributor.author | Kruijssen, J.M.D. | |
dc.contributor.author | Mills, Elisabeth | |
dc.contributor.author | Sokolov, V. | |
dc.contributor.author | Walker, D.L. | |
dc.contributor.author | Barnes, A.T. | |
dc.contributor.author | Contreras, Y. | |
dc.contributor.author | Bally, J. | |
dc.contributor.author | Battersby, C. | |
dc.contributor.author | Beuther, H. | |
dc.contributor.author | Butterfield, N. | |
dc.contributor.author | Dale, J.E. | |
dc.contributor.author | Henning, T. | |
dc.contributor.author | Jackson, J.M. | |
dc.contributor.author | Kauffmann, J. | |
dc.contributor.author | Pillai, T. | |
dc.contributor.author | Ragan, S. | |
dc.contributor.author | Riener, M. | |
dc.contributor.author | Zhang, Q. | |
dc.date.accessioned | 2021-04-14T15:29:43Z | |
dc.date.available | 2021-04-14T15:29:43Z | |
dc.date.issued | 2019-02-17 | |
dc.identifier.citation | J 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/stz471 | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/31595 | |
dc.description | This 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.abstract | In 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.publisher | Royal Astronomical Society | en_US |
dc.rights | © 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. | en_US |
dc.subject | Turbulence | en_US |
dc.subject | Stars: formation | en_US |
dc.subject | ISM: clouds | en_US |
dc.subject | ISM: kinematics and dynamics | en_US |
dc.subject | ISM: structure | en_US |
dc.subject | Galaxy: centre | en_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+0.016 | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Mills, Elisabeth | |
kusw.kudepartment | Physics and Astronomy | en_US |
dc.identifier.doi | 10.1093/mnras/stz471 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-9656-7682 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-9593-7618 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-8804-0212 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0003-4164-5588 | en_US |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess | en_US |