Speaker
Abstract content <br> (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>
Above a sunspot umbra the chromosphere resonates with three-minute oscillations. These oscillations can be explained as an acoustic resonator with slow magnetosonic waves moving along magnetic field lines and are partially reflected at the solar photosphere and transition region. The temperature structure of the chromosphere is explored by perturbing the plasma with random noise. Spectra of the velocity fluctuations show that as the chromospheric depth increases, the gradient of the power in the spectra decreases. This relation is explored with white, pink and brown noise seeds as well as different temperature profile configurations. It was found that a clear signature in the obtained spectra can be used as a potential measure for the chromospheric depth above sunspots.
Apply to be<br> considered for a student <br> award (Yes / No)?
No
Level for award<br> (Hons, MSc, <br> PhD)?
PhD
Main supervisor (name and email)<br>and his / her institution
Gert Botha (gert.botha@northumbria.ac.uk)
University of Northumbria at Newcastle Upon Tyne, UK
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
No
