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The response of the solar coronal magnetic field to small-scale photospheric boundary motions including the possible formation of current sheets via the Parker scenario is one of open questions of solar physics. Here we address the problem…

Solar and Stellar Astrophysics · Physics 2015-05-14 A. L. Wilmot-Smith , D. I. Pontin , G. Hornig

We consider a fast magnetosonic multifluid shock as a representation of the solar-wind termination shock. We assume the action of the transition happens in a three-step process: In the first step, the upstream supersonic solar-wind plasma…

Space Physics · Physics 2016-02-24 Hans J. Fahr , Daniel Verscharen

We give a detailed description of electrodynamics as an emergent theory from condensed-matter-like structures, not only {\it per se} but also as a warm-up for the study of the much more complex case of gravity. We will concentrate on two…

General Relativity and Quantum Cosmology · Physics 2014-12-12 Carlos Barceló , Raúl Carballo-Rubio , Luis J. Garay , Gil Jannes

In the following short review we will outline some of the possible interaction processes of lower solar atmospheric plasma with the embedded small-scale solar magnetic fields. After introducing the topic, important types of small-scale…

Solar and Stellar Astrophysics · Physics 2022-10-07 Santiago Vargas Domínguez , Dominik Utz

When the solar wind interacts with the ionosphere of an unmagnetized planet, it induces currents that form an induced magnetosphere. These currents and their associated magnetic fields play a pivotal role in controlling the movement of…

The electromagnetic energy equation is analyzed term by term in a 3D simulation of kinetic reconnection previously reported by \citet{vapirev2013formation}. The evolution presents the usual 2D-like topological structures caused by an…

Plasma Physics · Physics 2015-06-18 Giovanni Lapenta , Martin Goldman , David Newman , Stefano Markidis , Andrey Divin

We present the first results of a two-dimensional MHD simulation of the solar magnetogranulation. The medium was assumed to be compressible, gravitationally stratified, radiatively coupled, partially ionized, and turbulent. The simulated…

Solar and Stellar Astrophysics · Physics 2012-10-15 A. S. Gadun , V. A. Sheminova , S. K. Solanki

Magnetic waves are a relevant component in the dynamics of the solar atmosphere. Their significance has increased because of their potential as a remote diagnostic tool and their presumed contribution to plasma heating processes. We discuss…

Solar and Stellar Astrophysics · Physics 2023-07-19 I. Arregui

The presence of turbulent phenomena in the outer solar atmosphere is a given. However, because we are reduced to remotely sensing the atmosphere of a star with instruments of limited spatial and/or spectral resolution, we can only infer the…

Solar and Stellar Astrophysics · Physics 2013-11-12 Scott W. McIntosh , Christian Bethge , James Threlfall , Ineke De Moortel , Robert J. Leamon , Hui Tian

The magnetic field produced by planets with active dynamos, like the Earth, can exert sufficient pressure to oppose supersonic stellar wind plasmas, leading to the formation of a standing bow shock upstream of the magnetopause, or…

The origin of the solitary waves in the Earth's magnetosphere and the solar wind, particularly close to the magnetic reconnection regions, is still an open question. For that purpose, we used the fluid model to obtain the mechanism behind…

Plasma Physics · Physics 2022-03-15 M. S. Afify , R. E. Tolba , W. M. Moslem

The most promising model for explaining the origin of solar magnetism is the flux transport dynamo model, in which the toroidal field is produced by differential rotation in the tachocline, the poloidal field is produced by the…

Solar and Stellar Astrophysics · Physics 2015-05-19 Arnab Rai Choudhuri

Magnetohydrodynamic (MHD) kink waves are ubiquitously observed in the solar atmosphere. The propagation and damping of these waves may play relevant roles for the transport and dissipation of energy in the solar atmospheric medium. However,…

Solar and Stellar Astrophysics · Physics 2015-06-23 Roberto Soler , Jaume Terradas

The planet Mercury possesses a small but highly dynamic magnetosphere in which the role and dynamics of electrons are still largely unknown. We aim at modeling the global dynamics of solar wind electrons impinging on Mercury's…

The theory of the solar/stellar activity cycles is presented, based on the mean-field concept in magnetohydrodynamics. A new approach to the formulation of the electromotive force and the theory of differential rotation and meridional…

Astrophysics · Physics 2017-02-22 Günther Rüdiger , Rainer Arlt

The inverse cascade of magnetic energy occurs when helicity or rotational instability exists in the magnetohydrodynamic (MHD) system. This well known phenomenon has been considered as a basis for the large scale magnetic field in universe.…

Plasma Physics · Physics 2016-02-16 Kiwan Park

Magnetic reconnection is a fundamental physical process converting magnetic energy into not only plasma energy but also particle energy in various astrophysical phenomena. In this letter, we show a unique dataset of a solar flare where…

Solar and Stellar Astrophysics · Physics 2022-01-12 Lei Lu , Li Feng , Alexander Warmuth , Astrid M. Veronig , Jing Huang , Siming Liu , Weiqun Gan , Zongjun Ning , Beili Ying , Guannan Gao

Conversion of electromagnetic energy into magnetohydrodynamic energy occurs when the electric conductivity changes from negligible to finite values. This process is relevant during the epoch of reheating of the early Universe at the end of…

Plasma Physics · Physics 2023-08-30 Axel Brandenburg , Nousaba Nasrin Protiti

The physical processes that heat the solar corona and accelerate the solar wind remain unknown after many years of study. Some have suggested that the wind is driven by waves and turbulence in open magnetic flux tubes, and others have…

Solar and Stellar Astrophysics · Physics 2015-05-19 Steven R. Cranmer , Adriaan A. van Ballegooijen

We use the exact solutions for magnetoacoustic waves in a two dimensional isothermal atmosphere with uniform inclined magnetic field to calculate the wave reflection, transmission, and conversion of slow and fast waves incident from above…

Solar and Stellar Astrophysics · Physics 2016-01-27 Shelley Hansen , Paul Cally , Alina Donea