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

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    Date Issued
    2020-12
    Publisher Version
    10.1038/s41550-020-1172-6
    Author(s)
    Pillai, Thushara G. S.
    Clemens, Dan P.
    Reissl, Stefan
    Myers, Philip C.
    Kauffmann, Jens
    Lopez-Rodriguez, Enrique
    Alves, F. O.
    Franco, G. A. P.
    Henshaw, Jonathan
    Menten, Karl M.
    Nakamura, Fumitaka
    Seifried, Daniel
    Sugitani, Koji
    Wiesemeyer, Helmut
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    Permanent Link
    https://hdl.handle.net/2144/41996
    Version
    Accepted manuscript
    Citation (published version)
    Thushara GS 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. 2020. "Magnetized filamentary gas flows feeding the young embedded cluster in Serpens South." Nature Astronomy, Volume 4, Issue 12, pp. 1195 - 1201. https://doi.org/10.1038/s41550-020-1172-6
    Abstract
    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.
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    • BU Open Access Articles [3730]


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