Forward modeling of gyrosynchrotron emission perturbations by sausage mode
Abstract
The modulation of the GS emission by fast sausage MHD oscillations was modeled for typical flaring parameters. For the first time a 3D model was adapted for this purpose and variations of the angle between the magnetic field vector and the line-of-sight have been taken into account. The variation of the thermodynamic quantities are found by linearizing the perturbed ideal MHD equations about the magnetostatic equilibrium. Effects of line-of-sight angle and instrumental reso- lution on perturbations of gyrosynchrotron intensity are analyzed for two models: the base model with the strong Razin suppression and the low density model in which the Razin effect was inessential at all examined frequencies. Results obtained for phase relations between low (f < fpeak) and high (f > fpeak) frequency emission oscillation contradict to previous predictions made with models without spatial resolution and assuming inhomogeneous emitting source.
- Publication:
-
40th COSPAR Scientific Assembly
- Pub Date:
- 2014
- Bibcode:
- 2014cosp...40E2741R