Volume 420, Number 2, June III 2004
|Page(s)||699 - 707|
|Published online||28 May 2004|
Properties of longitudinal flux tube waves
II. Limiting shock strength behavior
Department of Physics, Science Hall, University of Texas at Arlington (UTA), Arlington, TX 76019-0059, USA
2 Institute for Theoretical Astrophysics, University of Heidelberg, Tiergartenstraße 13, 69121 Heidelberg, Germany
Corresponding author: firstname.lastname@example.org
Accepted: 16 March 2004
We extend our previous work on analytic evaluations of properties of longitudinal tube waves to waves propagating in gravitational atmospheres. We derive an expression for the limiting shock strength and discuss the behavior of the shock strength in tubes of different geometry. It is found that a height-independent value for the limiting strength is attained for constant cross-section tubes and exponential tubes, whereas for wine-glass tubes the limiting shock strength increases with height due to the increase of the tube cross section. The limiting shock strength is well reproduced by time-dependent simulations. The derived limiting shock strength as well as the energy dissipation rate of the waves show significant similarities to acoustic waves. The limiting shock strength allows to estimate the heating potential of waves in the absence of detailed time-dependent computations.
Key words: magnetohydrodynamics (MHD) / shock waves / methods: analytical / Sun: chromosphere / stars: chromospheres
© ESO, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.