Results 11 to 20 of about 1,001 (183)
Ion-cyclotron waves in solar coronal hole [PDF]
New Astronomy, 2012 We investigate the effect of the Plume/Interplume Lane (PIPL) structure of the solar Polar Coronal Hole (PCH) on the propagation characteristics of ion-cyclotron waves (ICW). The gradients of physical parameters determined by SOHO and TRACE satellites both parallel and perpendicular to the magnetic field are considered with the aim of determining how ...
Dogan S., Pekünlü E.R.
openaire +2 more sources
The Heating of Solar Coronal Loops by Alfvén Wave Turbulence [PDF]
The Astrophysical Journal, 2017 Abstract In this paper we further develop a model for the heating of coronal loops by Alfvén wave turbulence (AWT). The Alfvén waves are assumed to be launched from a collection of kilogauss flux tubes in the photosphere at the two ends of the loop.
A. A. van Ballegooijen +2 more
openaire +4 more sources
Standing Kink Waves in Sigmoid Solar Coronal Loops: Implications for Coronal Seismology [PDF]
The Astrophysical Journal Letters, 2020 Abstract Using full three-dimensional magnetohydrodynamic numerical simulations, we study the effects of magnetic field sigmoidity or helicity on the properties of the fundamental kink oscillation of solar coronal loops. Our model consists of a single denser coronal loop, embedded in a plasma with dipolar force-free magnetic field with a
N. Magyar, V. M. Nakariakov
openaire +2 more sources
FLOWS AND WAVES IN BRAIDED SOLAR CORONAL MAGNETIC STRUCTURES [PDF]
The Astrophysical Journal, 2015 6 pages, 5 figures, Accepted for publication in ApJ ...
V. Pant, A. Datta, D. Banerjee
openaire +2 more sources
ALFVÉN WAVE SOLAR MODEL (AWSoM): CORONAL HEATING [PDF]
The Astrophysical Journal, 2014 We present a new version of the Alfven Wave Solar Model (AWSoM), a global model from the upper chromosphere to the corona and the heliosphere. The coronal heating and solar wind acceleration are addressed with low-frequency Alfven wave turbulence. The injection of Alfven wave energy at the inner boundary is such that the Poynting flux is proportional ...
van der Holst, Bart +6 more
openaire +2 more sources
High-frequency waves in the solar coronal plasma [PDF]
Astronomy & Astrophysics, 2006 We derived numerical solutions of a dispersion equation in order to analyze the effect of finite plasma temperature on the highfrequency wave dispersion characteristics in conditions of hot magnetized plasma in the solar corona. Spectra of the high-frequency eigen modes of these plasma were determined in conditions when the electron gyrofrequency is ...
V. G. Ledenev +2 more
openaire +1 more source
Fast magnetohydrodynamic waves in a solar coronal arcade [PDF]
Astronomy & Astrophysics, 2017 Aims. To investigate detailed properties of fast MHD modes of a three-dimensional waveguide for a cylindrical magnetic arcade.\ud \ud Methods. To derive governing equations and dispersion relations for different density profiles and to numerically solve them to obtain\ud discrete eigenvalues for fast modes and the corresponding eigenfunctions.\ud \ud ...
Thackray, H., Jain, R.
openaire +4 more sources
Impulsively generated kink wave trains in solar coronal slabs
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT We numerically follow the response of density-enhanced slabs to impulsive, localized, transverse velocity perturbations by working in the framework of ideal magnetohydrodynamics (MHD). Both linear and non-linear regimes are addressed. Kink wave trains are seen to develop along the examined slabs, sharing the characteristics that
Guo, Mingzhe +3 more
openaire +2 more sources
A new method for estimating global coronal wave properties based on their interaction with solar coronal holes [PDF]
Astronomy & Astrophysics, 2020 Among the effects of interactions between global coronal waves (CWs) and coronal holes (CHs) is the formation of reflected and transmitted waves. Observations of such events provide us with measurements of different CW parameters, such as phase speed and intensity amplitudes.
Piantschitsch, I. +2 more
openaire +2 more sources
Solar flares and coronal shock waves [PDF]
Journal of Geophysical Research: Space Physics, 2001 The ignition of coronal shock waves by solar flares is investigated confronting the results of a simple MHD model with the observations. Characteristics of type II bursts recorded in the metric and decametric wavelength range are compared with the properties of the microwave and soft X‐ray bursts of the associated flares.
openaire +3 more sources