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The Structure and Dynamics of Filamentary Molecular Clouds

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Book cover Turbulence and Magnetic Fields in Astrophysics

Part of the book series: Lecture Notes in Physics ((LNP,volume 614))

Abstract

We summarize models of self-gravitating, filamentary molecular clouds that are threaded by helical magnetic fields. We review the observational evidence suggesting that some clouds may exist in this regime. An analytic limit is derived that demonstrates why the Fiege & Pudritz model always tends to an ~ r -(1.9±0.1) density profile at large radius, in agreement with observations. An equation is also derived for the radial compression or expansion of filamentary clouds that are out of equilibrium. We use this analysis to show that filamentary clouds are extremely stable with respect to radial collapse or expansion, which allows them to survive long enough to fragment gravitationally along their axes. Fragmenting, helically magnetized filaments have a unique kinematic signature, which is discussed and compared with recent observations. We discuss models of prolate cores that form within filaments. Polarimetry models of filaments are discussed and compared with the data.

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Author information

Authors and Affiliations

  1. Herzberg Institute of Astrophysics, National Research Council of Canada, 5071 West Saanich Road, V9E 2E7, Victoria, B.C. Canada

    Jason D. Fiege

  2. Canadian Institute for Theoretical Astrophysics, McLennan Labs, University of Toronto, 60 St. George Street, M5S 3H8, Toronto, Ontario, Canada

    Jason D. Fiege

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  1. Jason D. Fiege
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Editor information

Editors and Affiliations

  1. Laboratoire de Radioastronomie, Ecole Normale Supérieure, 24, Rue Lhomond, 75231, Paris Cedex 05, France

    Edith Falgarone

  2. Observatoire de la Côte d’azur, CNRS, B.P.4229, 06304, Nice Cédex 4, France

    Thierry Passot

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© 2003 Springer-Verlag Berlin Heidelberg

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Fiege, J.D. (2003). The Structure and Dynamics of Filamentary Molecular Clouds. In: Falgarone, E., Passot, T. (eds) Turbulence and Magnetic Fields in Astrophysics. Lecture Notes in Physics, vol 614. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-36238-X_11

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  • DOI: https://doi.org/10.1007/3-540-36238-X_11

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-00274-1

  • Online ISBN: 978-3-540-36238-8

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