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Magnetohydrodynamical models of helical magnetic fields in spiral arms

Published online by Cambridge University Press:  14 August 2015

M. Fujimoto  and
M. Miyamoto
M. Fujimoto
Affiliation:
Nagoya University, Nagoya, Japan
M. Miyamoto
Affiliation:
Tokyo Astronomical Observatory, Tokyo, Japan

Abstract

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A circular arm with elliptical cross-section is used as a model of the spiral arm. It is demonstrated magnetohydrodynamically that interstellar gas may flow in a helical path along the axis of the arm and interstellar helical magnetic lines of force can spiral around it. It is pointed out that though the rolling motions of gas do not always indicate the existence of the helical magnetic field, the latter cannot be in a stationary state without the former. Some observational supports to the present model are given.

Type
Part IV/Comparison of Theory and Observations
Information
Symposium - International Astronomical Union , Volume 38: The Spiral Structure of our Galaxy , 1970 , pp. 444 - 447
Copyright
Copyright © Reidel 1970 

References

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