The theory of magnetohydrodynamic wave generation by localized sources. II. Collisionless dissipation of wave packets

Journal Article · Tue Aug 01 00:00:00 EDT 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/167724· OSTI ID:5556697

Collins, W ^[1]

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1. Chicago Univ., IL (USA)

The dispersion equation of Barnes (1966) is used to study the dissipation of asymptotic wave packets generated by localized periodic sources. The solutions of the equation are linear waves, damped by Landau and transit-time processes, in a collisionless warm plasma. For the case of an ideal MHD system, most of the waves emitted from a source are shown to cancel asympotically through destructive interference. The modes transporting significant flux to asymptotic distances are found to be Alfven waves and fast waves with theta (the angle between the magnetic field and the characteristics of the far-field waves) of about 0 and about pi/2. 13 refs.

• OSTI ID: 5556697
• Journal Information: Astrophysical Journal; (USA), Vol. 343; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COLLISIONLESS PLASMA
WAVE PACKETS
ENERGY LOSSES
DAMPING
HYDROMAGNETIC WAVES
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
PERTURBATION THEORY
SOLAR CORONA
ATMOSPHERES
FLUID MECHANICS
HYDRODYNAMICS
LOSSES
MECHANICS
PLASMA
STELLAR ATMOSPHERES
STELLAR CORONAE
640104* - Astrophysics & Cosmology- Solar Phenomena