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Star Formation in a...
Star Formation in a Strongly Magnetized Cloud
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- Cheng, Yu (författare)
- University of Virginia
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- Tan, Jonathan, 1973 (författare)
- University of Virginia,Chalmers tekniska högskola,Chalmers University of Technology
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- Caselli, Paola (författare)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Fissel, Laura (författare)
- Queen's University
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- Arce, Hector G. (författare)
- Yale University
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- Fontani, Francesco (författare)
- Istituto nazionale di astrofisica (INAF),Max-Planck-Institut für extraterrestrische Physik,Max Planck Institute for Extraterrestrial Physics
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- Goodson, Matthew D. (författare)
- The University of North Carolina System
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- Liu, Mengyao (författare)
- University of Virginia
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- Galitzk, Nicholas (författare)
- University of California
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(creator_code:org_t)
- 2021-07-29
- 2021
- Engelska.
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Ingår i: Astrophysical Journal. - : American Astronomical Society. - 1538-4357 .- 0004-637X. ; 916:2
- Relaterad länk:
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https://iopscience.i...
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https://doi.org/10.3...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- We study star formation in the Center Ridge 1 (CR1) clump in the Vela C giant molecular cloud, selected as a high column density region that shows the lowest level of dust continuum polarization-angle dispersion, likely indicating that the magnetic field is relatively strong. We observe the source with the Atacama Large Millimeter/submillimeter Array 7 m array at 1.05 and 1.3 mm wavelengths, which enable measurements of dust temperature, core mass, and astrochemical deuteration. A relatively modest number of 11 dense cores are identified via their dust continuum emission, with masses spanning from 0.17-6.7 M-circle dot. Overall CR1 has a relatively low compact dense gas fraction compared with other typical clouds with similar column densities, which may be a result of the strong magnetic field and/or the very early evolutionary stage of this region. The deuteration ratios, D-frac, of the cores, measured with N2H+(3-2) and N2D+(3-2) lines, span from 0.011-0.85, with the latter being one of the highest values yet detected. The level of deuteration appears to decrease with evolution from prestellar to protostellar phase. A linear filament, running approximately parallel with the large scale magnetic field orientation, is seen connecting the two most massive cores, each having CO bipolar outflows aligned orthogonally to the filament. The filament contains the most deuterated core, likely to be prestellar and located midway between the protostars. The observations permit measurement of the full deuteration structure of the filament along its length, which we present. We also discuss the kinematics and dynamics of this structure, as well as of the dense core population.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- 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)
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Cheng, Yu
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Tan, Jonathan, 1 ...
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Caselli, Paola
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Fissel, Laura
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Arce, Hector G.
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Fontani, Frances ...
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visa fler...
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Goodson, Matthew ...
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Liu, Mengyao
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Galitzk, Nichola ...
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visa färre...
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Chalmers tekniska högskola