EDP Sciences
Free access
Volume 448, Number 1, March II 2006
Page(s) 375 - 378
Section The Sun
DOI http://dx.doi.org/10.1051/0004-6361:20053588

A&A 448, 375-378 (2006)
DOI: 10.1051/0004-6361:20053588

Resonant absorption in dissipative flux tubes

H. Safari1, S. Nasiri1, 2, K. Karami1, 3, 4 and Y. Sobouti1

1  Institute for Advanced Studies in Basic Sciences, Gava Zang, PO Box 45195-1159, Zanjan, Iran
    e-mail: [hsafary;nasiri;karami;sobouti]@iasbs.ac.ir
2  Department of Physics, Zanjan University, Zanjan, Iran
3  Institute for Theoretical Physics and Mathematics, PO Box 19395-5531, Tehran, Iran
4  Department of Physics, University of Kurdistan, PO Box 66177-15175, Sanandaj, Iran

(Received 7 June 2005 / Accepted 19 October 2005 )

We study the resonant absorption of MHD waves in magnetized flux tubes with a radial density inhomogeneity. Within the approximation that resistive and viscous processes are operative in thin layers surrounding the singularities of the MHD equations, we give the full spectrum of the eigenfrequencies and damping rates of the MHD quasi modes of the tube. Both surface and body modes are analyzed.

Key words: Sun: corona -- Sun: magnetic fields -- Sun: oscillations

© ESO 2006