Forward modeling of gyrosynchrotron intensity perturbations by sausage modes

V. E. Reznikova; Patrick Antolin; Tom Van Doorsselaere

doi:10.1088/0004-637X/785/2/86

Forward modeling of gyrosynchrotron intensity perturbations by sausage modes

V. E. Reznikova, Patrick Antolin, Tom Van Doorsselaere

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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.

Original language	English
Article number	86
Journal	Astrophysical Journal
Volume	785
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/785/2/86
Publication status	Published - 28 Mar 2014
Externally published	Yes

Keywords

Sun: flares
Sun: oscillations
Sun: radio radiation
Waves

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10.1088/0004-637X/785/2/86

Reznikova_2014_ApJ_785_86Final published version, 1.96 MB

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title = "Forward modeling of gyrosynchrotron intensity perturbations by sausage modes",

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.",

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author = "Reznikova, {V. E.} and Patrick Antolin and {Van Doorsselaere}, Tom",

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doi = "10.1088/0004-637X/785/2/86",

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T1 - Forward modeling of gyrosynchrotron intensity perturbations by sausage modes

AU - Reznikova, V. E.

AU - Antolin, Patrick

AU - Van Doorsselaere, Tom

PY - 2014/3/28

Y1 - 2014/3/28

N2 - 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.

AB - 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.

KW - Sun: flares

KW - Sun: oscillations

KW - Sun: radio radiation

KW - Waves

U2 - 10.1088/0004-637X/785/2/86

DO - 10.1088/0004-637X/785/2/86

M3 - Article

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VL - 785

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 86

ER -

Forward modeling of gyrosynchrotron intensity perturbations by sausage modes

Abstract

Keywords

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