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Ubiquitous velocity...
Ubiquitous velocity fluctuations throughout the molecular interstellar medium
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- Henshaw, Jonathan D. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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Kruijssen, J. M. D. (author)
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- Longmore, S. (author)
- Liverpool John Moores University
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- Riener, Manuel (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Leroy, Adam K. (author)
- Ohio State University
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- Rosolowsky, E. (author)
- University of Alberta
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- Ginsburg, A. (author)
- University of Florida
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- Battersby, C. (author)
- University of Connecticut
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Chevance, Mélanie (author)
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- Meidt, Sharon E. (author)
- Universiteit Gent,Ghent university
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- Glover, S. C.O. (author)
- Ruprecht-Karls-Universität Heidelberg,Heidelberg University
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- Hughes, A. (author)
- Institut de Recherche en Astrophysique et Planétologie (IRAP),Universite Paul Sabatier Toulouse III,Paul Sabatier University
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- Kainulainen, Jouni, 1979 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Klessen, R. S. (author)
- Ruprecht-Karls-Universität Heidelberg,Heidelberg University
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- Schinnerer, E. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Schruba, Andreas (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Beuther, H. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Bigiell, F. (author)
- Universität Bonn,University of Bonn
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- Blanc, Guillermo A. (author)
- Carnegie Observatories,Universidad de Chile (UCH),University of Chile (UCH)
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- Emsellem, Eric (author)
- European Southern Observatory (ESO),CRAL Le Centre de Recherche Astronomique de Lyon
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- Henning, T. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Herrera, Cynthia N. (author)
- Institut de Radioastronomie Millimétrique (IRAM)
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- Koch, Eric W. (author)
- University of Alberta
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- Pety, J. (author)
- Institut de Radioastronomie Millimétrique (IRAM),Observatoire de Paris,Paris Observatory
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- Ragan, S. E. (author)
- Cardiff University
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- Sun, Jiayi (author)
- Ohio State University
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Max Planck Gesellschaft zur Förderung der Wissenschaften eV. (MPG) Liverpool John Moores University (creator_code:org_t)
- 2020-07-06
- 2020
- English.
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In: Nature Astronomy. - : Springer Science and Business Media LLC. - 2397-3366. ; 4:11, s. 1064-1071
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Abstract
Subject headings
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- The density structure of the interstellar medium determines where stars form and release energy, momentum and heavy elements, driving galaxy evolution1–4. Density variations are seeded and amplified by gas motion, but the exact nature of this motion is unknown across spatial scales and galactic environments5. Although dense star-forming gas probably emerges from a combination of instabilities6,7, convergent flows8 and turbulence9, establishing the precise origin is challenging because it requires gas motion to be quantified over many orders of magnitude in spatial scale. Here we measure10–12 the motion of molecular gas in the Milky Way and in nearby galaxy NGC 4321, assembling observations that span a spatial dynamic range 10−1–103 pc. We detect ubiquitous velocity fluctuations across all spatial scales and galactic environments. Statistical analysis of these fluctuations indicates how star-forming gas is assembled. We discover oscillatory gas flows with wavelengths ranging from 0.3–400 pc. These flows are coupled to regularly spaced density enhancements that probably form via gravitational instabilities13,14. We also identify stochastic and scale-free velocity and density fluctuations, consistent with the structure generated in turbulent flows9. Our results demonstrate that the structure of the interstellar medium cannot be considered in isolation. Instead, its formation and evolution are controlled by nested, interdependent flows of matter covering many orders of magnitude in spatial scale.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Henshaw, Jonatha ...
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Kruijssen, J. M. ...
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Longmore, S.
-
Riener, Manuel
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Leroy, Adam K.
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Rosolowsky, E.
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show more...
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Ginsburg, A.
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Battersby, C.
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Chevance, Mélani ...
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Meidt, Sharon E.
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Glover, S. C.O.
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Hughes, A.
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Kainulainen, Jou ...
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Klessen, R. S.
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Schinnerer, E.
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Schruba, Andreas
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Beuther, H.
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Bigiell, F.
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Blanc, Guillermo ...
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Emsellem, Eric
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Henning, T.
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Herrera, Cynthia ...
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Koch, Eric W.
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Pety, J.
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Ragan, S. E.
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Sun, Jiayi
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show less...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Mechanical Engin ...
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and Fluid Mechanics ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Fusion Plasma an ...
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Nature Astronomy
- By the university
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Chalmers University of Technology