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Dynamically dominant magnetic fields in the diffuse interstellar medium

Lookup NU author(s): Dr Andrew Fletcher, Professor Anvar ShukurovORCiD


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Observations show that magnetic fields in the interstellar medium (ISM) often to not respond to increases in gas density as would be naively expected for a frozen-in field. This may suggest that the magnetic field in the diffuse gas becomes detached from dense clouds as they form. We have investigated this possibility using theoretical estimates, a simple magneto-hydrodynamic model of a flow without mass conservation and numerical simulations of a thermally unstable flow. Our results show that significant magnetic flux can be shed from dense clouds as they form in the diffuse ISM, leaving behind a magnetically dominated diffuse gas.

Publication metadata

Author(s): Fletcher A, Korpi M, Shukurov A

Editor(s): KG Strassmeier; AG Kosovichev; J E Beckman

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: Cosmic Magnetic Fields: from Planets, to Stars and Galaxies

Year of Conference: 2009

Pages: 87-88

ISSN: 9780521889902

Publisher: Cambridge University Press

Library holdings: Search Newcastle University Library for this item

Series Title: IAU Symposium Proceedings Series

ISBN: 0521889901