Modeling Solar Wind Variations over an 11 Year Cycle with Alfvén Wave Dissipation: A Parameter Study
Modeling Solar Wind Variations over an 11 Year Cycle with Alfvén Wave Dissipation: A Parameter Study
复制标题
使用阿尔文波耗散模拟 11 年周期内的太阳风变化：参数研究
DOI：
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发表时间：
2021
影响因子：
4.9
通讯作者：
É. Buchlin
中科院分区：
文献类型：
--
作者：
S. Hazra;V. Réville;B. Perri;A. Strugarek;A. Brun;É. Buchlin
We study the behavior and properties of the solar wind using a 2.5D Alfvén wave (AW)-driven wind model. We first systematically compare the results of an AW-driven wind model with a polytropic approach. Polytropic magnetohydrodynamic wind models are thermally driven, while AWs act as additional acceleration and heating mechanisms in the AW-driven model. We confirm that an AW-driven model is required to reproduce the observed bimodality of slow and fast solar winds. We are also able to reproduce the observed anticorrelation between the terminal wind velocity and the coronal source temperature with the AW-driven wind model. We also show that the wind properties along an 11 yr cycle differ significantly from one model to the other. The AW-driven model again shows the best agreement with observational data. Indeed, solar surface magnetic field topology plays an important role in the AW-driven wind model, as it enters directly into the input energy sources via the Poynting flux. On the other hand, the polytropic wind model is driven by an assumed pressure gradient; thus, it is relatively less sensitive to the surface magnetic field topology. Finally, we note that the net torque spinning down the Sun exhibits the same trends in the two models, showing that the polytropic approach still correctly captures the essence of stellar winds.
阿尔文波动力学对太阳风大尺度特性的作用：MHD 模拟与帕克太阳探测器 E1 数据的比较
DOI：
10.3847/1538-4365/ab4fef
发表时间：
2020
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
Réville, Victor;Velli, Marco;Panasenco, Olga;Tenerani, Anna;Shi, Chen;Badman, Samuel T.;Bale, Stuart D.;Kasper, J. C.;Stevens, Michael L.;Korreck, Kelly E.
通讯作者：
Korreck, Kelly E.