Waves in solar magnetic flux tubes - The observational signature of undamped longitudinal tube waves
Abstract
Linear calculations of undamped magnetoacoustic waves utilizing the thin-tube approximation are presented and their influence on the Stokes I and V line parameters of a set of photospheric spectral lines is analyzed. To improve the observational diagnostics of flux tube waves, the dependence of various line parameters, such as the Stokes V zero-crossing wavelength, Stokes V amplitude, width area and asymmetry, on wave parameters is studied. It is determined that it is possible to set a lower limit on the energy flux transported by longitudinal tube waves by measuring time series of the Stokes V zero-crossing wavelength of a selected group of lines.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- May 1992
- DOI:
- 10.1093/mnras/256.1.13
- Bibcode:
- 1992MNRAS.256...13S
- Keywords:
-
- Magnetic Flux;
- Magnetoacoustic Waves;
- Solar Magnetic Field;
- Magnetohydrodynamics;
- Photosphere;
- Radiative Transfer;
- Spectral Line Width;
- Standing Waves;
- Stokes Law Of Radiation;
- Wave Propagation;
- Solar Physics