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Magnetized filamentary gas flows feeding the young embedded cluster in Serpens South

Observations indicate that molecular clouds are strongly magnetized, and that magnetic fields influence the formation of stars. A key observation supporting the conclusion that molecular clouds are significantly magnetized is that the orientation of their internal structure is closely related to tha...

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Main Authors: Pillai, Thushara (Author) , Clemens, Dan P. (Author) , Reißl, Stefan (Author) , Myers, Philip C. (Author) , Kauffmann, Jens (Author) , Lopez-Rodriguez, Enrique (Author) , Alves, F. O. (Author) , Franco, G. A. P. (Author) , Henshaw, Jonathan D. (Author) , Menten, Karl (Author) , Nakamura, Fumitaka (Author) , Seifried, Daniel (Author) , Sugitani, Koji (Author) , Wiesemeyer, Helmut (Author)
Format: Article (Journal)
Language:English
Published: December 2020
In: Nature astronomy
Year: 2020, Volume: 4, Issue: 12, Pages: 1195-1201
ISSN:2397-3366
DOI:10.1038/s41550-020-1172-6
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1038/s41550-020-1172-6
Verlag, lizenzpflichtig, Volltext: https://www.nature.com/articles/s41550-020-1172-6
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Author Notes:Thushara G.S. Pillai, Dan P. Clemens, Stefan Reissl, Philip C. Myers, Jens Kauffmann, Enrique Lopez-Rodriguez, F.O. Alves, G.A.P. Franco, Jonathan Henshaw, Karl M. Menten, Fumitaka Nakamura, Daniel Seifried, Koji Sugitani, Helmut Wiesemeyer
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Summary:Observations indicate that molecular clouds are strongly magnetized, and that magnetic fields influence the formation of stars. A key observation supporting the conclusion that molecular clouds are significantly magnetized is that the orientation of their internal structure is closely related to that of the magnetic field. At low column densities, the structure aligns parallel with the field, whereas at higher column densities, the gas structure is typically oriented perpendicular to magnetic fields, with a transition at visual extinctions AV ≳ 3 mag. Here we use far-infrared polarimetric observations from the HAWC+ polarimeter on SOFIA to report the discovery of a further transition in relative orientation, that is, a return to parallel alignment at AV ≳ 21 mag in parts of the Serpens South cloud. This transition appears to be caused by gas flow and indicates that magnetic supercriticality sets in near AV ≳ 21 mag, allowing gravitational collapse and star cluster formation to occur even in the presence of relatively strong magnetic fields.
Item Description:Gesehen am 17.04.2026
Physical Description:Online Resource
ISSN:2397-3366
DOI:10.1038/s41550-020-1172-6

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