On the magnetic field diffusion in mhd modeling of the inner coma of comet halley
作者:
M.D. Kartalev,
V.I. Nikolova,
期刊:
Geophysical & Astrophysical Fluid Dynamics
(Taylor Available online 1998)
卷期:
Volume 89,
issue 1-2
页码: 145-168
ISSN:0309-1929
年代: 1998
DOI:10.1080/03091929808213650
出版商: Taylor & Francis Group
关键词: Cosmical plasmas;magnetohydrodynamics;magnetic diffusion;mass-loading;solar wind–comet exosphere interaction;inner coma region
数据来源: Taylor
摘要:
Some approaches of one-dimensional time-dependent magneto-hydrodynamic modeling of the structure of the inner coma of comet Halley are considered. The influence of the magnetic field diffusion on this structure is studied. The solution of Cravens (1989) approach containing classic magnetic diffusion is compared with an approach containing a specific diffusion, caused by non-instantaneous mass-loading of new ions. A case with no magnetic field is also considered. Common features of all the solutions are obtained. Special attention is paid to the sharp velocity jump, synchronized with a local density pick. Some differences between two types of magnetic field diffusion are discussed. A possible connection is supposed between this consideration and the large-scale shock fitting modeling of the solar plasma-comet interaction.
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