Results 31 to 40 of about 16,413 (221)

MHD Waves and Coronal Seismology: an overview of recent results

, 2012
Recent observations have revealed that MHD waves and oscillations are ubiquitous in the solar atmosphere, with a wide range of periods. We give a brief review of some aspects of MHD waves and coronal seismology which have recently been the focus of ...
Uchida Y., Wang T., Zajtsev V. V.
core   +2 more sources

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

Prospective Implications of Extreme-ultraviolet Coronal Plumes for Magnetic-network Genesis of Coronal Heating, Coronal-hole Solar Wind, and Solar-wind Magnetic Field Switchbacks

The Astrophysical Journal Letters, 2023
We propose that coronal heating in EUV coronal plumes is weaker, not stronger, than in adjacent nonplume coronal magnetic funnels. This expectation stems from (i) the observation that an EUV plume is born as the magnetic flux at the foot of the plume’s ...
Ronald L. Moore, Sanjiv K. Tiwari, Navdeep K. Panesar, Alphonse C. Sterling   +3 more
doaj   +1 more source

Slow magnetoacoustic standing waves in a curved solar coronal slab [PDF]

Astronomy & Astrophysics, 2008
Summary: Aims. We consider a model of a two-dimensional solar coronal arcade to explore the effects of a curved magnetic field topology on excitation and attenuation of slow magnetoacoustic standing waves. Methods. The time-dependent ideal magnetohydrodynamic equations are solved numerically to find the spatial and temporal signatures of these waves ...
Ogrodowczyk, R., Murawski, K., Solanki, S.   +2 more
openaire   +3 more sources

Solar wind and kinetic heliophysics [PDF]

Annales Geophysicae, 2018
This paper reviews recent aspects of solar wind physics and elucidates the role Alfvén waves play in solar wind acceleration and turbulence, which prevail in the low corona and inner heliosphere.
E. Marsch, E. Marsch
doaj   +1 more source

The Source of Three-minute Magneto-acoustic Oscillations in Coronal Fans [PDF]

, 2012
We use images of high spatial, spectral and temporal resolution, obtained using both ground- and space-based instrumentation, to investigate the coupling between wave phenomena observed at numerous heights in the solar atmosphere.
Al, Aschwanden, Aschwanden, Aschwanden, Aschwanden, Aschwanden, Bohlin, Brooks, Centeno, Chou, Cram, D. B. Jess, D. J. Christian, De Moortel, Deforest, Del Zanna, Deubner, Doyle, F. P. Keenan, Fedun, Fleck, Hofmann, I. De Moortel, Jess, Jess, Jess, Jess, Jess, K. P. Reardon, Khomenko, Klimchuk, Leenaarts, M. Mathioudakis, Marsh, Marsh, Mendoza-Briceño, Nagashima, Nigam, Ofman, Ofman, P. H. Keys, Pesnell, Reardon, Rimmele, Ruderman, Saito, Schmitz, Schrijver, Shelyag, Sobotka, Sobotka, Thomas, van de Hulst, Verth   +53 more
core   +3 more sources

Radiative damping of standing acoustic waves in solar coronal loops [PDF]

Astronomy & Astrophysics, 2008
Context. A detailed understanding of the physical processes that determine the damping timescales of magneto-acoustic waves is essential to interpret diagnostic results from the application of solar magneto-seismology.\ud Aims. The influence of the transition region and the importance of radiative emission, arising from equilibrium and non-equilibrium ...
Bradshaw, S.J., Erdelyi, R.
openaire   +3 more sources

THREE-DIMENSIONAL PROPAGATION OF MAGNETOHYDRODYNAMIC WAVES IN SOLAR CORONAL ARCADES [PDF]

The Astrophysical Journal, 2010
We numerically investigate the excitation and temporal evolution of oscillations in a two-dimensional coronal arcade by including the three-dimensional propagation of perturbations. The time evolution of impulsively generated perturbations is studied by solving the linear, ideal magnetohydrodynamic (MHD) equations in the zero-beta approximation.
Rial, S., Arregui, I., Terradas, J., Oliver, R., Ballester, J. L.   +4 more
openaire   +2 more sources

Estimating the Poynting Flux of Alfvénic Waves in Polar Coronal Holes across Solar Cycle 24

The Astrophysical Journal
Alfvénic waves are known to be prevalent throughout the corona and solar wind. Determining the Poynting flux supplied by the waves is required for constraining their role in plasma heating and acceleration, as well as providing a constraint for Alfvén ...
R. J. Morton, M. J. Weberg, N. Balodhi, J. A. McLaughlin   +3 more
doaj   +1 more source

Connecting the Sun and the Solar Wind: The First 2.5 Dimensional Self-consistent MHD Simulation under the Alfv\'en Wave Scenario

, 2012
The solar wind emanates from the hot and tenuous solar corona. Earlier studies using 1.5 dimensional simulations show that Alfv\'{e}n waves generated in the photosphere play an important role in coronal heating through the process of non-linear mode ...
Antolin, Banerjee, Bogdan, Cranmer, Dmitruk, Einaudi, Esser, Fedun, Hasan, Heyvaerts, Kudoh, Lamy, Matsumoto, Matsumoto, Matthaeus, Nishizuka, Okamoto, Perez, Steiner, Suzuki, Takeru Ken Suzuki, Takuma Matsumoto, Teriaca, Tsuneta, Van Ballegooijen, Verdini, Wilhelm, Yokoyama, Zangrilli   +28 more
core   +1 more source