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The extent to which a magnetosphere protects its planetary atmosphere from stellar wind ablation depends upon how well it prevents energy and momentum exchange with the atmosphere and how well it traps otherwise escaping plasma. We focus on…

Earth and Planetary Astrophysics · Physics 2018-10-17 Eric G. Blackman , John A. Tarduno

It is clear that the solar corona is being heated and that coronal magnetic fields undergo reconnection all the time. Here we attempt to show that these two facts are in fact related - i.e. coronal reconnection generates heat. This attempt…

Solar and Stellar Astrophysics · Physics 2023-07-19 Dana W. Longcope , Lucas A. Tarr

The solar wind is connected to the Sun's atmosphere by flux tubes that are rooted in an ever-changing pattern of positive and negative magnetic polarities on the surface. Observations indicate that the magnetic field is filamentary and…

Solar and Stellar Astrophysics · Physics 2015-06-15 Steven R. Cranmer , Adriaan A. van Ballegooijen , Lauren N. Woolsey

Magnetic field embedded in a perfectly conducting fluid preserves its topology for all time. Although ionized astrophysical objects, like stars and galactic disks, are almost perfectly conducting, they show indications of changes in…

Astrophysics of Galaxies · Physics 2010-03-16 A. Lazarian , G. Kowal , E. Vishniac , K. Kulpa-Dubel , K. Otmianowska-Mazur

Turbulence, magnetic reconnection, and shocks can be present in explosively unstable plasmas, forming a new electromagnetic environment, which we call here turbulent reconnection, and where spontaneous formation of current sheets takes…

High Energy Astrophysical Phenomena · Physics 2018-11-28 Loukas Vlahos , Heinz Isliker

Hinode observations have revealed intermittent recurrent plasma ejections/jets in the chromosphere. These are interpreted as a result of non-perfectly anti-parallel magnetic reconnection, i.e. component reconnection, between a twisted…

Solar and Stellar Astrophysics · Physics 2015-06-23 N. Nishizuka , Y. Hayashi , H. Tanabe , A. Kuwahata , Y. Kaminou , Y. Ono , M. Inomoto , T. Shimizu

Magnetic flux fills the heliosphere, expands outward from the solar corona, and is fundamentally related to the structure and dynamics of the solar corona and solar wind. Open magnetic flux and the fast wind are thought to originate from…

Solar and Stellar Astrophysics · Physics 2026-04-13 Roberto Lionello , Cooper Downs , Emily I. Mason , Jon A. Linker , Pete Riley , Mathew J. Owens

Magnetic reconnection is a ubiquitous plasma phenomenon that plays a critical role in particle heating and energization. During reconnection, the topology of magnetic field rearranges, depositing energy into the surrounding plasma through…

Reconnection and turbulence are two of the most commonly observed dynamical processes in plasmas, but their relationship is still not fully understood. Using 2.5D kinetic particle-in-cell simulations of both strong turbulence and…

Magnetic reconnection is the most likely mechanism responsible for the high temperature events that are observed in strongly magnetized locations around the temperature minimum in the low solar chromosphere. This work improves upon our…

Solar and Stellar Astrophysics · Physics 2018-10-26 Lei Ni , Vyacheslav S. Lukin , Nicholas A. Murphy , Jun Lin

As a star spins-down during the main sequence, its wind properties are affected. In this work, we investigate how the Earth's magnetosphere has responded to the change in the solar wind. Earth's magnetosphere is simulated using 3D…

Earth and Planetary Astrophysics · Physics 2019-09-25 S. Carolan , A. A. Vidotto , C. Loesch , P. Coogan

We perform a theoretical and numerical study of anti-parallel 2D magnetic reconnection with asymmetries in the density and reconnecting magnetic field strength in addition to a bulk flow shear across the reconnection site in the plane of…

Space Physics · Physics 2015-11-04 C. E. Doss , C. M. Komar , P. A. Cassak , F. D. Wilder , S. Eriksson , J. F. Drake

The aim of this research is to simulate the interaction of the solar wind with the magnetic field of Mercury and to study the particle fluxes between the magnetosheath and the planet surface. We simulate the magnetosphere structure using…

Earth and Planetary Astrophysics · Physics 2016-08-17 J. Varela , F. Pantellini , M. Moncuquet

We study the interaction between the Moon and the solar wind using a three-dimensional hybrid plasma solver. The proton fluxes and electromagnetical fields are presented for typical solar wind conditions with different magnetic field…

Space Physics · Physics 2012-03-13 M. Holmström , S. Fatemi , Y. Futaana , H. Nilsson

The rotation of sunspots around their umbral center has long been considered as an important process in leading to solar eruptions, but the underlying mechanism remains unclear. A prevailing physical picture on how sunspot rotation leads to…

Solar and Stellar Astrophysics · Physics 2023-10-03 Chaowei Jiang , Xueshang Feng , Xinkai Bian , Peng Zou , Aiying Duan , Xiaoli Yan , Qiang Hu , Wen He , Xinyi Wang , Pingbing Zuo , Yi Wang

The role of interchange reconnection as a drive mechanism for the solar wind is explored by solving the global magnetic-field-aligned equations describing wind acceleration. Boundary conditions in the low corona, including a…

Solar and Stellar Astrophysics · Physics 2023-08-16 J. F. Drake , S. D. Bale , M. Swisdak , N. E. Raouafi , M. Velli

Magnetic reconnection in the partially ionized solar chromosphere is studied in 2.5-dimensional magnetohydrodynamic simulations including radiative cooling and ambipolar diffusion. A Harris current sheet with and without a guide field is…

Solar and Stellar Astrophysics · Physics 2015-09-24 Lei Ni , Bernhard Kliem , Jun Lin , Ning Wu

The interaction between the solar wind and a magnetosphere is fundamental to the dynamics of a planetary system. Here, we address fundamental questions on the large-scale magnetosheath flow around Saturn using a 3D magnetohydrodynamic (MHD)…

Space Physics · Physics 2017-08-30 A. H. Sulaiman , X. Jia , N. Achilleos , N. Sergis , D. A. Gurnett , W. S. Kurth

Interchange reconnection is thought to play an important role in determining the dynamics and material composition of the slow solar wind that originates from near coronal hole boundaries. To explore the implications of this process we…

Solar and Stellar Astrophysics · Physics 2022-07-20 Roger B. Scott , Stephen J. Bradshaw , Mark G. Linton

We present a model for separator reconnection due to an isolated reconnection process. Separator reconnection is a process which occurs in the neighbourhood of a distinguished field line (the separator) connecting two null points of a…

Solar and Stellar Astrophysics · Physics 2015-05-28 A. L. Wilmot-Smith , G. Hornig