Results 11 to 20 of about 232,020 (293)

Are Coronal Loops Projection Effects?

The Astrophysical Journal
We report results of an in-depth numerical investigation of three-dimensional projection effects that could influence the observed loop-like structures in an optically thin solar corona.
Vadim M. Uritsky, James A. Klimchuk
doaj   +3 more sources

Transverse Oscillations of Coronal Loops [PDF]

Space Science Reviews, 2009
On 14 July 1998 TRACE observed transverse oscillations of a coronal loop generated by an external disturbance most probably caused by a solar flare. These oscillations were interpreted as standing fast kink waves in a magnetic flux tube. Firstly, in this review we embark on the discussion of the theory of waves and oscillations in a homogeneous ...
Ruderman, Michael S., Erdélyi, Róbert
openaire   +5 more sources

Torsional Alfvén Shock Waves in Stratified Coronal Loops

The Astrophysical Journal
The evolution of weakly nonlinear Alfvén waves in coronal loops in the density structuring both across and along the field while experiencing dissipation is highlighted.
S. M. Hejazi, S. Vasheghani Farahani, K. Hajisharifi   +2 more
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Slipping Magnetic Reconnection in Coronal Loops

Science, 2007
Magnetic reconnection of solar coronal loops is the main process that causes solar flares and possibly coronal heating. In the standard model, magnetic field lines break and reconnect instantaneously at places where the field mapping is discontinuous.
Aulanier, Guillaume, Golub, Leon, Deluca, E. E., Cirtain, Jonathan W., Kano, Ryouhei, Lundquist, Loraine L., Narukage, Noriyuki, Sakao, Taro, Weber, Mark A.   +8 more
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3D nonlinear wave heating of coronal loops

Space Science Reviews, 1994
The heating of solar coronal loops by the resonant absorption or phase-mixing of incident wave energy is investigated in the framework of 3D nonlinear magnetohydrodynamics (MHD) by means of numerical simulations.
Poedts, S., Goedbloed, J.P.
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Kink Oscillations of Coronal Loops [PDF]

Space Science Reviews, 2021
AbstractKink oscillations of coronal loops, i.e., standing kink waves, is one of the most studied dynamic phenomena in the solar corona. The oscillations are excited by impulsive energy releases, such as low coronal eruptions. Typical periods of the oscillations are from a few to several minutes, and are found to increase linearly with the increase in ...
Nakariakov, V.M., Anfinogentov, S.A., Antolin, P., Jain, R., Kolotkov, D.Y., Kupriyanova, E.G., Li, D., Magyar, N., Nistico, G., Pascoe, D.J., Srivastava, A.K., Terradas, J., Farahani, S. Vasheghani, Verth, G., Yuan, D., Zimovets, I.   +15 more
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Asymmetric Twisting of Coronal Loops

Symmetry, 2023
The bright solar corona entirely consists of closed magnetic loops rooted in the photosphere. Photospheric motions are important drivers of magnetic stressing, which eventually leads to energy release into heat. These motions are chaotic and obviously different from one footpoint to the other, and in fact, there is strong evidence that loops are finely
Gabriele Cozzo, Paolo Pagano, Antonino Petralia, Fabio Reale   +3 more
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PONDEROMOTIVE ACCELERATION IN CORONAL LOOPS [PDF]

The Astrophysical Journal, 2016
ABSTRACT Ponderomotive acceleration has been asserted to be a cause of the first ionization potential (FIP) effect, the well-known enhancement in abundance by a factor of 3–4 over photospheric values of elements in the solar corona with FIP less than about 10 eV.
R. B. Dahlburg, J. M. Laming, B. D. Taylor, K. Obenschain   +3 more
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Heating of braided coronal loops [PDF]

Astronomy & Astrophysics, 2011
We investigate the relaxation of braided magnetic loops in order to find out how the type of braiding via footpoint motions affects resultant heating of the loop. Two magnetic loops, braided in different ways, are used as initial conditions in resistive MHD simulations and their subsequent evolution is studied.
Wilmot-Smith, A. L., Pontin, D. I., Yeates, A. R., Hornig, G.   +3 more
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The Damping of Coronal Loop Oscillations [PDF]

The Astrophysical Journal, 2002
Motivated by recent Transition Region and Coronal Explorer (TRACE) observations of damped oscillations in coronal loops, we consider analytically the motion of an inhomogeneous coronal magnetic tube of radius a in a zero-beta plasma. An initially perturbed tube may vibrate in its kink mode of oscillation, but those vibrations are damped. The damping is
Ruderman, M.S., Roberts, B.
openaire   +2 more sources