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Related papers: Linear magnetosonic waves in solar wind flow tubes

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Observations show that transverse magnetohydrodynamic (MHD) waves and flows are often simultaneously present in magnetic loops of the solar corona. The waves are resonantly damped in the Alfv\'en continuum because of plasma and/or magnetic…

Solar and Stellar Astrophysics · Physics 2019-03-06 Roberto Soler

The modulation of the microwave emission intensity from a flaring loop by a standing linear sausage fast magnetoacoustic wave is considered in terms of a straight plasma slab with the perpendicular Epstein profile of the plasma density,…

Solar and Stellar Astrophysics · Physics 2022-08-31 Elena G. Kupriyanova , Tatyana I. Kaltman , Alexey A. Kuznetsov

We present a new model, MULTI-VP, that computes the three-dimensional structure of the solar wind which includes the chromosphere, the transition region, and the corona and low heliosphere. MULTI-VP calculates a large ensemble of wind…

Solar and Stellar Astrophysics · Physics 2017-04-05 Rui F. Pinto , Alexis P. Rouillard

We investigate sharply outlined features recorded in solar magnetic field tracers. It is shown that the magnetic boundaries of a sunspot do not coincide with the photometric ones. Moreover, there is no clear magnetic boundary around…

Solar and Stellar Astrophysics · Physics 2023-09-21 V. N. Obridko , D. D. Sokoloff , M. M. Katsova

Magnetic flux tubes reaching from the solar convective zone into the chromosphere have to pass through the relatively cool, and therefore non-ideal (i.e. resistive) photospheric region enclosed between the highly ideal sub-photospheric and…

Solar and Stellar Astrophysics · Physics 2015-06-04 Jens Kleimann , Gunnar Hornig

Collision of the magnetic flux tubes in the Quiet Sun was proposed as one of the possible sources for the heating of the solar atmosphere (Furusawa and Sakai, 2000). The solar photosphere was observed using the New Solar Telescope ad Big…

Solar and Stellar Astrophysics · Physics 2015-05-20 Aleksandra Andic

We investigate the properties of nonlinear fast magnetosonic (NFM) waves in a solar prominence, motivated by recent high-resolution and high-cadence Hinode/SOT observations of small-scale oscillations in a prominence pillar. As an example,…

Solar and Stellar Astrophysics · Physics 2023-03-08 Leon Ofman , Therese A. Kucera , C. Richard DeVore

This paper considers two-dimensional stratified water waves propagating under the force of gravity over an impermeable flat bed and with a free surface. We prove the existence of a global continuum of classical solutions that are periodic…

Analysis of PDEs · Mathematics 2009-02-11 Samuel Walsh

Chandra [1] made an attempt to show that the work of Dwivedi and Srivastava [2] (hereinafter DS) can be investigated even analytically and their results are erroneous. Dwivedi and Srivastava [3] picked up some values of Chandra [1] and…

Solar and Stellar Astrophysics · Physics 2009-12-22 Suresh Chandra , B. K. Kumthekar

Magnetic flux tubes in the solar corona support a rich variety of transverse oscillations, which are theoretically interpreted as magnetohydrodynamic (MHD) modes with a fast and/or Alfv\'enic character. In the standard flux tube model made…

Solar and Stellar Astrophysics · Physics 2024-12-13 Roberto Soler , Andrew Hillier

Recent theoretical studies have demonstrated the possibility to excite and sustain noncollinear magnetization states in ferromagnetic nanowires. The resulting state is referred to as a spin-density wave (SDW). SDWs can be interpreted as…

Mesoscale and Nanoscale Physics · Physics 2019-05-01 Patrick Sprenger , Mark A. Hoefer , Ezio Iacocca

A variety of kinetic waves develop in the solar wind. The relationship between these waves and larger-scale structures, such as current sheets and ongoing turbulence remain a topic of investigation. Similarly, the instabilities producing…

Impulsively excited wave trains are of considerable interest in solar coronal seismology. To our knowledge, however, it remains to examine the three-dimensional (3D) dispersive propagation of impulsive kink waves in straight, field-aligned,…

Solar and Stellar Astrophysics · Physics 2022-11-16 Bo Li , Mingzhe Guo , Hui Yu , Shao-Xia Chen , Mijie Shi

We discuss the propagation of electromagnetic waves on a rectangular lattice of polarizable point dipoles. For wavelengths long compared to the lattice spacing, we obtain the dispersion relation in terms of the lattice spacing and the…

Astrophysics · Physics 2007-05-23 D. Gutkowicz-Krusin , B. T. Draine

Aims. We study the emergence of a non-twisted flux tube from the solar interior into the solar atmosphere. We investigate whether the length of the buoyant part of the flux tube (i.e. {\lambda}) affects the emergence of the field and the…

Solar and Stellar Astrophysics · Physics 2015-11-18 Petros Syntelis , Vasilis Archontis , Costis Gontikakis , Kanaris Tsinganos

An explicit equation of the propagational angle of microwave emission between the line-of-sight and the local magnetic field is newly derived. The existence of the solution of propagational angle is clearly shown under a series of typical…

Solar and Stellar Astrophysics · Physics 2015-06-12 Guangli Huang , Qiwu Song , Jianping Li

The meridional flow in the Sun is an axisymmetric flow that is generally poleward directed at the surface, and is presumed to be of fundamental importance in the generation and transport of magnetic fields. Its true shape and strength,…

Solar and Stellar Astrophysics · Physics 2015-06-11 Thomas Hartlep , Junwei Zhao , Alexander G. Kosovichev , Nagi N. Mansour

We present a statistical analysis of electrostatic solitary waves observed aboard Magnetospheric Multiscale spacecraft in the Earth's magnetosheath. Applying single-spacecraft interferometry to several hundred solitary waves collected in…

Magnetic flux tubes in the presence of background rotational flows, known as solar vortex tubes, are abundant throughout the solar atmosphere and may act as conduits for MHD waves to transport magnetic energy to the upper solar atmosphere.…

Solar and Stellar Astrophysics · Physics 2024-10-08 Samuel Skirvin , Viktor Fedun , Marcel Goossens , Suzana Silva , Gary Verth

We demonstrate that, in contrast with what was previously believed, multi-hump solitary waves can be stable. By means of linear stability analysis and numerical simulations, we investigate the stability of two- and three-hump solitary waves…