Damping rates of p-modes by an ensemble of randomly distributed thin magnetic flux tubes

Details Damping rates of p-modes by an ensemble of randomly distributed thin magnetic flux tubes Damping rates of p-modes by an ensemble of randomly distributed thin magnetic flux tubes

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..273..351g&link_type=abstract

The Physics of Sun and Star Spots, Proceedings of the International Astronomical Union, IAU Symposium, Volume 273, p. 351-355

Physics

Sun: Magnetic Fields, Sun: Helioseismology, Sun: Oscillations, Mhd, Scattering

Scientific paper

The magnetohydrodynamic (MHD) sausage tube waves are excited in the magnetic flux tubes by p-mode forcing. These tube waves thus carry energy away from the p-mode cavity which results in the deficit of incident p-mode energy. We calculate the loss of incident p-mode energy as a damping rate of f- and p-modes. We calculate the damping rates of f- and p-modes by a model Sun consisting of an ensemble of many thin magnetic flux tubes with varying plasma properties and distributions. Each magnetic flux tube is modelled as axisymmetric, vertically oriented and untwisted. We find that the magnitude and the form of the damping rates are sensitive to the plasma-β of the tubes and the upper boundary condition used.

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