MAGNETIC FLUX TUBES IN LATE-TYPE STARS
PROPAGATION AND GENERATION OF TRANSVERSE WAVES IN MAGNETIC FLUX TUBES
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One of the most important and still unsolved problems in stellar astrophysics is to identify the basic physical processes that are responsible for the extensive heating of the chromosphere and corona in late-type stellar atmospheres. Two widely accepted ways of heating are due to acoustic wave in non-magnetic region, and MHD (magneto-hydrodynamic) waves in the concentrated magnetic flux tube region. Out of three different MHD tube modes (transverse, longitudinal and torsional) this study only involves the propagation and generation of the transverse tube wave, which are the most efficient mean...
One of the most important and still unsolved
problems in stellar astrophysics is to identify the
basic physical processes that are responsible for
the extensive heating of the chromosphere and corona
in late-type stellar atmospheres. Two widely
accepted ways of heating are due to acoustic
wave in non-magnetic region, and MHD (magneto-
hydrodynamic) waves in the concentrated magnetic
flux tube region. Out of three different MHD tube
modes (transverse, longitudinal and torsional) this
study only involves the propagation and generation
of the transverse tube wave, which are the most
efficient means of energy transfer in the stellar
atmosphere. The current research has two components.
First, starting from the general properties of
magnetic flux tubes, propagation of stellar
transverse tube waves and corresponding cutoff
frequencies are determined analytically for the
first time for non-isothermal stellar atmospheres.
Second, the rate of transverse wave energy
generation at the stellar surface at a given height
has been calculated analytically for linear tube
wave, and numerically for nonlinear tube wave in
late-type stars for the first time.
problems in stellar astrophysics is to identify the
basic physical processes that are responsible for
the extensive heating of the chromosphere and corona
in late-type stellar atmospheres. Two widely
accepted ways of heating are due to acoustic
wave in non-magnetic region, and MHD (magneto-
hydrodynamic) waves in the concentrated magnetic
flux tube region. Out of three different MHD tube
modes (transverse, longitudinal and torsional) this
study only involves the propagation and generation
of the transverse tube wave, which are the most
efficient means of energy transfer in the stellar
atmosphere. The current research has two components.
First, starting from the general properties of
magnetic flux tubes, propagation of stellar
transverse tube waves and corresponding cutoff
frequencies are determined analytically for the
first time for non-isothermal stellar atmospheres.
Second, the rate of transverse wave energy
generation at the stellar surface at a given height
has been calculated analytically for linear tube
wave, and numerically for nonlinear tube wave in
late-type stars for the first time.
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