Author:
KALITA B. C.,BHATTA R. P.
Abstract
Kinetic Alfvén solitons with hot electrons and finite electron
inertia in a low-beta (β=8πn0T/B2G,
the ratio of the kinetic to the magnetic pressure) plasma
is studied analytically, with the ion motion being considered dominant
through
the polarization drift. Both compressive and rarefactive kinetic Alfvén
solitons are found to exist within a definite range of
kz (the direction of propagation of
the kinetic Alfvén solitary waves with respect to the direction
of
the magnetic
field) for each pair of assigned values of β and M (Mach
number).
Unlike in
previous theoretical investigations, β appears as an explicit parameter
for the
kinetic Alfvén solitons in this case. In addition, consideration
of
the electron
pressure gradient is found to suppress the speed of both the Alfvén
solitons
considerably for A
(=2QM2/βk2z,
with Q the electron-to-ion mass ratio) less than unity.
Publisher
Cambridge University Press (CUP)
Cited by
5 articles.
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