Reznikova, V. E., Antolin, Patrick and Van Doorsselaere, Tom (2014) Forward modeling of gyrosynchrotron intensity perturbations by sausage modes. The Astrophysical Journal, 785 (2). p. 86. ISSN 0004-637X
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Abstract
To determine the observable radio signatures of the fast sausagestanding wave, we examine gyrosynchrotron (GS) emission modulation usinga linear three-dimensional magnetohydrodynamic model of a plasmacylinder. Effects of the line-of-sight angle and instrumental resolutionon perturbations of the GS intensity are analyzed for two models: a basemodel with strong Razin suppression and a low-density model in which theRazin effect was unimportant. Our finding contradicts previouspredictions made with simpler models: an in-phase variation of intensitybetween low (f peak) and high (f > fpeak) frequencies is found for the low-density model and ananti-phase variation for the base model in the case of a viewing angleof 45°. The spatially inhomogeneous character of the oscillatingemission source and the spatial resolution of the model are found tohave a significant effect on the resulting intensity.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Sun: flares, Sun: oscillations, Sun: radio radiation, Waves |
| Subjects: | F300 Physics F500 Astronomy |
| Department: | Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering |
| Depositing User: | Elena Carlaw |
| Date Deposited: | 25 Oct 2019 13:51 |
| Last Modified: | 01 Aug 2021 00:00 |
| URI: | http://nrl.northumbria.ac.uk/id/eprint/41245 |
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