Slow-mode oscillations of large-scale coronal loops
Abstract
On several occasions, repetitive X-ray brightenings, sometimes accompanied by mass injections into adjacent loops, appeared quasi-periodically with mean periods close to 20 minutes. In all cases when X-ray images were available, the sites of these brightenings were in active regions which were associated with large-scale coronat loops of length (2 − 3) × 105 km. Therefore, the primary source of these long-periodic pulsations might be slow-mode oscillations in these large-scale loops. Free MHD oscillations, proposed earlier by Roberts, Edwin, and Benz (1984), may fit the observed data.
- Publication:
-
Solar Physics
- Pub Date:
- July 1994
- DOI:
- 10.1007/BF00680454
- Bibcode:
- 1994SoPh..152..505S
- Keywords:
-
- Coronal Loops;
- H Alpha Line;
- Magnetohydrodynamic Flow;
- Magnetohydrodynamic Stability;
- Magnetohydrodynamic Waves;
- Power Spectra;
- Solar Flares;
- Solar Magnetic Field;
- Solar Oscillations;
- Solar Radio Emission;
- Solar X-Rays;
- X Ray Astronomy;
- X Ray Spectra;
- Goes 2;
- Mass Flow;
- Mathematical Models;
- Solar Maximum Mission;
- Solar Temperature;
- X Ray Imagery;
- Solar Physics;
- Active Region;
- Primary Source;
- Benz;
- Coronat;
- Coronal Loop