On the linear structure of the interlaced Alfvén vortices in the tail of Uranus at solstice

IF 1.8 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS
Filippo Pantellini
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引用次数: 0

Abstract

Incompressible vortex flow are observed in a large variety of astrophysical plasmas such as the convection zone and the atmosphere of stars, in astrophysical jets in stellar winds and in planetary magnetospheres. More specifically, magnetohydrodynamic (MHD) simulations have shown that two large scale interlaced Alfvénic vortices structure the magnetic tail of Uranus at solstice time. Assuming identical vortices, we compute the general linear structure of the flow near their centers within the frame of ideal MHD. We then use the analytic results to interpret and qualify the vortices observed in a 3D MHD simulation of a fast rotating Uranus-type planet.

Abstract Image

关于至日天王星尾部交错的阿尔芬涡旋的线性结构
在各种天体物理等离子体中,如恒星的对流区和大气层、恒星风中的天体物理喷流以及行星磁层中,都能观测到不可压缩的涡流。更具体地说,磁流体力学(MHD)模拟显示,两个大尺度交错的阿尔费尼旋涡在至日时构造了天王星的磁尾。假设涡旋完全相同,我们将在理想 MHD 框架内计算其中心附近流动的一般线性结构。然后,我们利用分析结果来解释和鉴定在快速旋转的天王星型行星的三维 MHD 模拟中观测到的漩涡。
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来源期刊
Astrophysics and Space Science
Astrophysics and Space Science 地学天文-天文与天体物理
CiteScore
3.40
自引率
5.30%
发文量
106
审稿时长
2-4 weeks
期刊介绍: Astrophysics and Space Science publishes original contributions and invited reviews covering the entire range of astronomy, astrophysics, astrophysical cosmology, planetary and space science and the astrophysical aspects of astrobiology. This includes both observational and theoretical research, the techniques of astronomical instrumentation and data analysis and astronomical space instrumentation. We particularly welcome papers in the general fields of high-energy astrophysics, astrophysical and astrochemical studies of the interstellar medium including star formation, planetary astrophysics, the formation and evolution of galaxies and the evolution of large scale structure in the Universe. Papers in mathematical physics or in general relativity which do not establish clear astrophysical applications will no longer be considered. The journal also publishes topically selected special issues in research fields of particular scientific interest. These consist of both invited reviews and original research papers. Conference proceedings will not be considered. All papers published in the journal are subject to thorough and strict peer-reviewing. Astrophysics and Space Science features short publication times after acceptance and colour printing free of charge.
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