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, E. A. C. | |
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, James | |
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 | 2019-05-14T14:05:19Z | |
dc.date.available | 2019-05-14T14:05:19Z | |
dc.date.issued | 2019-05-01 | |
dc.identifier.citation | Henshaw , 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.issn | 0035-8711 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1902.02793v1 | |
dc.identifier.other | ORCID: /0000-0001-5252-5771/work/62751051 | |
dc.identifier.uri | http://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.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 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.extent | 29 | |
dc.format.extent | 9152890 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | Galaxy: centre | |
dc.subject | ISM: clouds | |
dc.subject | ISM: kinematics and dynamics | |
dc.subject | ISM: structure | |
dc.subject | Stars: formation | |
dc.subject | Turbulence | |
dc.subject | Astronomy and Astrophysics | |
dc.subject | Space 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+0.016 | en |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=85063719666&partnerID=8YFLogxK | |
rioxxterms.versionofrecord | 10.1093/mnras/stz471 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |