Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-10-14
Astronomy and Astrophysics
Astrophysics
4 pages, 2 figures, to appear in proceedings of 11th European Solar Physics Meeting, Leuven, 11-16 September 2005
Scientific paper
We show that 5-minute acoustic oscillations may resonantly convert into Alfv{\'e}n waves in the $\beta{\sim}1$ region of the solar atmosphere. Considering the 5-minute oscillations as pumping standing acoustic waves oscillating along unperturbed vertical magnetic field, we find on solving the ideal MHD equations that amplitudes of Alfv{\'e}n waves with twice the period and wavelength of acoustic waves exponentially grow in time when the sound and Alfv{\'e}n speeds are equal, i.e. $c_s \approx v_A$. The region of the solar atmosphere where this equality takes place we call a {\it swing layer}. The amplified Alfv{\'e}n waves may easily pass through the chromosphere and transition region carrying the energy of p-modes into the corona.
Kuridze D.
Roberts Barney B.
Zaqarashvili Teimuraz V.
No associations
LandOfFree
Resonant conversion of standing acoustic oscillations into Alfv{é}n waves in the $β~ 1$ region of the solar atmosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Resonant conversion of standing acoustic oscillations into Alfv{é}n waves in the $β~ 1$ region of the solar atmosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resonant conversion of standing acoustic oscillations into Alfv{é}n waves in the $β~ 1$ region of the solar atmosphere will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-222318