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Kinematics of Galac...
Kinematics of Galactic Centre clouds shaped by shear-seeded solenoidal turbulence
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- Petkova, Maya, 1990 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Kruijssen, J. M. D. (author)
- Technische Universität München (TUM),Technical University of Munich (TUM)
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- Henshaw, Jonathan D. (author)
- Liverpool John Moores University,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Longmore, S. (author)
- Liverpool John Moores University
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- Glover, S. C.O. (author)
- Ruprecht-Karls-Universität Heidelberg,Heidelberg University
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- Sormani, Mattia C. (author)
- Ruprecht-Karls-Universität Heidelberg,Heidelberg University
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- Armillotta, Lucia (author)
- Princeton University
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- Barnes, Ashley T. (author)
- Universität Bonn,University of Bonn
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- Klessen, R. S. (author)
- Ruprecht-Karls-Universität Heidelberg,Heidelberg University
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- Nogueras-Lara, Francisco (author)
- European Southern Observatory (ESO)
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Tress, Robin G. (author)
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- Armijos-Abendaño, Jairo (author)
- Escuela Politécnica Nacional,Cardiff University
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- Colzi, L. (author)
- Centro de Astrobiologia (CAB)
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- Federrath, C. (author)
- Australian National University
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- Garcia, P. J.V. (author)
- Universidad Catolica del Norte,Chinese Academy of Sciences
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- Ginsburg, A. (author)
- University of Florida
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- Henkel, C. (author)
- King Abdulaziz University,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Martin, S. (author)
- European Southern Observatory Santiago,Atacama Large Millimeter-submillimeter Array (ALMA)
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- Riquelme, D. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universidad de La Serena,University of La Serena
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- Rivilla, Víctor M. (author)
- Centro de Astrobiologia (CAB)
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Monthly Notices of the Royal Astronomical Society. - 0035-8711 .- 1365-2966. ; 525:1, s. 962-968
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https://doi.org/10.1...
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Abstract
Subject headings
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- The Central Molecular Zone (CMZ; the central ∼500 pc of the Galaxy) is a kinematically unusual environment relative to the Galactic disc, with high-velocity dispersions and a steep size-linewidth relation of the molecular clouds. In addition, the CMZ region has a significantly lower star formation rate (SFR) than expected by its large amount of dense gas. An important factor in explaining the low SFR is the turbulent state of the star-forming gas, which seems to be dominated by rotational modes. However, the turbulence driving mechanism remains unclear. In this work, we investigate how the Galactic gravitational potential affects the turbulence in CMZ clouds. We focus on the CMZ cloud G0.253+0.016 ('the Brick'), which is very quiescent and unlikely to be kinematically dominated by stellar feedback. We demonstrate that several kinematic properties of the Brick arise naturally in a cloud-scale hydrodynamics simulation, that takes into account the Galactic gravitational potential. These properties include the line-of-sight velocity distribution, the steepened size-linewidth relation, and the predominantly solenoidal nature of the turbulence. Within the simulation, these properties result from the Galactic shear in combination with the cloud's gravitational collapse. This is a strong indication that the Galactic gravitational potential plays a crucial role in shaping the CMZ gas kinematics, and is a major contributor to suppressing the SFR, by inducing predominantly solenoidal turbulent modes.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- Galaxy: centre
- stars: formation
- ISM: kinematics and dynamics
- galaxies: ISM
- ISM: evolution
- ISM: clouds
Publication and Content Type
- art (subject category)
- ref (subject category)
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Petkova, Maya, 1 ...
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Kruijssen, J. M. ...
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Henshaw, Jonatha ...
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Longmore, S.
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Glover, S. C.O.
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Sormani, Mattia ...
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show more...
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Armillotta, Luci ...
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Barnes, Ashley T ...
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Klessen, R. S.
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Nogueras-Lara, F ...
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Tress, Robin G.
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Armijos-Abendaño ...
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Colzi, L.
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Federrath, C.
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Garcia, P. J.V.
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Ginsburg, A.
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Henkel, C.
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Martin, S.
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Riquelme, D.
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Rivilla, Víctor ...
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NATURAL SCIENCES
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and Other Physics To ...
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Monthly Notices ...
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Chalmers University of Technology