Results 101 to 110 of about 2,789 (225)

Modeling of Condensations in Coronal Loops Produced by Impulsive Heating with Variable Frequencies and Locations

The Astrophysical Journal
We present the results of models of impulsively heated coronal loops using the 1D hydrodynamic Adaptively Refined Godunov Solver code. The impulsive heating events (which we refer to as nanoflares ) are modeled by discrete pulses of energy along the loop.
Therese A. Kucera, James A. Klimchuk, Manuel Luna   +2 more
doaj   +1 more source

Propagation and damping of MHD waves in the solar atmosphere

, 2015
Quasi-periodic disturbances have been observed in the outer solar atmosphere for many years. Although first interpreted as upflows (Schrijver et al.
Kiddie, Greg
core  

A Quasi-2D Turbulence Model of Coronal Heating Including Thermal Conduction and Radiative Cooling

The Astrophysical Journal
One of the key mechanisms proposed for coronal heating is dissipation of quasi-two-dimensional (2D) turbulence generated above the photosphere by continual mixing and convective shuffling of open and closed magnetic field lines within the so-called ...
Krishna Khanal, Gary P Zank, Laxman Adhikari   +2 more
doaj   +1 more source

Turbulent resistive heating of solar coronal arches

The Astrophysical Journal, 1983
The possibility that coronal heating occurs by means of anomalous Joule heating by electrostatic ion cyclotron waves is examined, with consideration given to currents running from foot of a loop to the other. It is assumed that self-fields generated by the currents are absent and currents follow the direction of the magnetic field, allowing the plasma ...
openaire   +1 more source

On the topology of global coronal magnetic fields

, 2014
This thesis considers the magnetic topology of the global solar corona. To understand the magnetic topology we use the magnetic skeleton which provides us with a robust description of the magnetic field.
Edwards, Sarah J.
core  

Coronal Loop Heating By Discrete Alfvén Waves

, 2015
We have modeled the solar coronal active loop heating by discrete Alfvén waves. Discrete Alfvén waves (DAW) are a new class of Alfvén waves which can be described by the two-fluid model with finite ion-cyclotron frequency, or the MHD model with plasma ...
Sakanaka P.H., Shigueoka H., De Azevedo C.A., De Assis A.S.   +3 more
core   +1 more source

Reconnection Nanojets in an Erupting Solar Filament with Unprecedented High Speeds

The Astrophysical Journal Letters
Solar nanojets are small-scale jets generated by component magnetic reconnection, characterized by collimated plasma motion perpendicular to the reconnecting magnetic field lines.
Yuhang Gao, Hui Tian, David Berghmans, Yadan Duan, Tom Van Doorsselaere, Hechao Chen, Emil Kraaikamp   +6 more
doaj   +1 more source

Coronal heating and nanoflares : current sheet formation and heating

, 2013
Aims: Solar photospheric footpoint motions can produce strong, localised currents in the corona. A detailed understanding of the formation process and the resulting heating is important in modelling nanoflares, as a mechanism for heating the solar corona.
R. Bowness, Hood, Alan William, Bowness, Ruth, Parnell, Clare Elizabeth, C. E. Parnell, A. W. Hood   +5 more
core   +1 more source

Modeling Time-variable Elemental Abundances in Coronal Loop Simulations

The Astrophysical Journal Letters
Numerous recent X-ray observations of coronal loops in both active regions and solar flares have shown clearly that elemental abundances vary with time.
Jeffrey W. Reep, John Unverferth, Will T. Barnes, Sherry Chhabra   +3 more
doaj   +1 more source

Solar Coronal Heating by Gravity-Induced Resonant Emission

, 2019
Solar Coronal Heating is a Nonlinear Quantum Mechanical Phenomenon. Corona is a powerful source of X-rays and ionisations & emissions of such radiations are quantum mechanical and levels are highly unstable to order of femto-seconds. A linear method of energy transfer like collisional ionisation to such levels is practically not feasible.
openaire   +2 more sources