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Polarized Light fro...
Polarized Light from Massive Protoclusters (POLIMAP). I. Dissecting the Role of Magnetic Fields in the Massive Infrared Dark Cloud G28.37+0.07
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- Law, Chi Yan, 1990 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,European Southern Observatory (ESO)
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- Tan, Jonathan, 1973 (författare)
- University of Virginia,Chalmers tekniska högskola,Chalmers University of Technology
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- Skalidis, R. (författare)
- California Institute of Technology (Caltech)
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visa fler...
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- Morgan, Larry (författare)
- Green Bank Observatory
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- Xu, Duo (författare)
- University of Virginia
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- de Oliveira Alves, Felipe (författare)
- Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC
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- Barnes, Ashley T. (författare)
- European Southern Observatory (ESO)
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- Butterfield, Natalie (författare)
- Green Bank Observatory
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- Caselli, P. (författare)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Cosentino, Giuliana, 1990 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Fontani, Francesco (författare)
- Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory
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- Henshaw, Jonathan D. (författare)
- Liverpool John Moores University
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- Jimenez-Serra, I. (författare)
- Instituto Nacional de Tecnica Aeroespacial
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- Lim, Wanggi (författare)
- California Institute of Technology (Caltech)
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(creator_code:org_t)
- 2024
- 2024
- Engelska.
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Ingår i: Astrophysical Journal. - 1538-4357 .- 0004-637X. ; 967:2
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://research.cha...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- Magnetic fields may play a crucial role in setting the initial conditions of massive star and star cluster formation. To investigate this, we report SOFIA-HAWC+ 214 μm observations of polarized thermal dust emission and high-resolution GBT-Argus C18O(1-0) observations toward the massive Infrared Dark Cloud (IRDC) G28.37+0.07. Considering the local dispersion of B-field orientations, we produce a map of the B-field strength of the IRDC, which exhibits values between ∼0.03 and 1 mG based on a refined Davis-Chandrasekhar-Fermi method proposed by Skalidis & Tassis. Comparing to a map of inferred density, the IRDC exhibits a B-n relation with a power-law index of 0.51 ± 0.02, which is consistent with a scenario of magnetically regulated anisotropic collapse. Consideration of the mass-to-flux ratio map indicates that magnetic fields are dynamically important in most regions of the IRDC. A virial analysis of a sample of massive, dense cores in the IRDC, including evaluation of magnetic and kinetic internal and surface terms, indicates consistency with virial equilibrium, sub-Alfvénic conditions, and a dominant role for B-fields in regulating collapse. A clear alignment of magnetic field morphology with the direction of the steepest column density gradient is also detected. However, there is no preferred orientation of protostellar outflow directions with the B-field. Overall, these results indicate that magnetic fields play a crucial role in regulating massive star and star cluster formation, and therefore they need to be accounted for in theoretical models of these processes.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
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Law, Chi Yan, 19 ...
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Tan, Jonathan, 1 ...
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Skalidis, R.
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Morgan, Larry
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Xu, Duo
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de Oliveira Alve ...
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visa fler...
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Barnes, Ashley T ...
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Butterfield, Nat ...
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Caselli, P.
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Cosentino, Giuli ...
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Fontani, Frances ...
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Henshaw, Jonatha ...
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Jimenez-Serra, I ...
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Lim, Wanggi
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