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SEDIGISM: the kinem...
SEDIGISM: the kinematics of ATLASGAL filaments
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- Mattern, M. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Kauffmann, J. (author)
- Massachusetts Institute of Technology (MIT),Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Csengeri, 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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- Urquhart, J. S. (author)
- University Of Kent
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- Leurini, S. (author)
- Istituto nazionale di astrofisica (INAF)
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- Wyrowski, F. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Giannetti, A. (author)
- Istituto di Radioastronomia
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- Barnes, P. J. (author)
- University of New England,University of Florida
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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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- Bronfman, L. (author)
- Universidad de Chile (UCH),University of Chile (UCH)
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- Duarte-Cabral, A. (author)
- Cardiff University
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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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- Kainulainen, Jouni, 1979 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Menten, K. M. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Schisano, E. (author)
- Istituto nazionale di astrofisica (INAF)
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- Schuller, F. (author)
- Paris Diderot University, France
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Max Planck Gesellschaft zur Förderung der Wissenschaften eV. (MPG) Massachusetts Institute of Technology (MIT) (creator_code:org_t)
- 2018-11-21
- 2018
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 619
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Abstract
Subject headings
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- Analyzing the kinematics of filamentary molecular clouds is a crucial step toward understanding their role in the star formation process. Therefore, we study the kinematics of 283 filament candidates in the inner Galaxy, that were previously identified in the ATLASGAL dust continuum data. The (CO)-C-13(2 - 1) and (CO)-O-18(2 - 1) data of the SEDIGISM survey (Structure, Excitation, and Dynamics of the Inner Galactic Inter Stellar Medium) allows us to analyze the kinematics of these targets and to determine their physical properties at a resolution of 30 '' and 0.25 km s(-1). To do so, we developed an automated algorithm to identify all velocity components along the line-of-sight correlated with the ATLASGAL dust emission, and derive size, mass, and kinematic properties for all velocity components. We find two-third of the filament candidates are coherent structures in position-position-velocity space. The remaining candidates appear to be the result of a superposition of two or three filamentary structures along the line-of- sight. At the resolution of the data, on average the filaments are in agreement with Plummer-like radial density profiles with a power-law exponent of p approximate to 1.5 +/- 0.5, indicating that they are typically embedded in a molecular cloud and do not have a well-defined outer radius. Also, we find a correlation between the observed mass per unit length and the velocity dispersion of the filament of m proportional to o(v)(2). We show that this relation can be explained by a virial balance between self-gravity and pressure. Another possible explanation could be radial collapse of the filament, where we can exclude infall motions close to the free-fall velocity.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geofysik (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)
- NATURVETENSKAP -- Biologi -- Strukturbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Structural Biology (hsv//eng)
Keyword
- ISM: kinematics and dynamics
- stars: formation
- ISM: clouds
- molecular data
- submillimeter: ISM
- methods: data analysis
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Mattern, M.
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Kauffmann, J.
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Csengeri, T.
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Urquhart, J. S.
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Leurini, S.
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Wyrowski, F.
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show more...
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Giannetti, A.
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Barnes, P. J.
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Beuther, H.
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Bronfman, L.
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Duarte-Cabral, A ...
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Henning, T.
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Kainulainen, Jou ...
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Menten, K. M.
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Schisano, E.
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Schuller, F.
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show less...
- About the subject
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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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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Geophysics
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Structural Biolo ...
- Articles in the publication
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Astronomy and As ...
- By the university
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Chalmers University of Technology