Results 21 to 30 of about 2,729 (231)

Density Enhancement Streams in The Solar Wind

The Astrophysical Journal Letters, 2023
This Letter describes a new phenomenon on the Parker Solar Probe of recurring plasma density enhancements that have Δ n/n ∼ 10% and that occur at a repetition rate of ∼5 Hz.
F. S. Mozer, O. Agapitov, S. D. Bale, R. Livi, O. Romeo, K. Sauer, I. Y. Vasko, J. Verniero   +7 more
doaj   +1 more source

Photospheric magnetic vortex structures [PDF]

, 2011
Using direct numerical magneto-hydrodynamic (MHD) simulations, we demonstrate the evidence of two physically different types of vortex motions in the solar photosphere.
Shelyag, S., Keenan, Francis, F. P. Keenan, Fedun, V., Mathioudakis, Mihalis, Mathioudakis, M., M. Mathioudakis, Shelyag, Sergiy, Erdélyi, Robert, Keenan, F. P., Erdelyi, R., R. Erdélyi, S. Shelyag, V. Fedun, Fedun, Viktor   +14 more
core   +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, Li, Bo, Van Doorsselaere, Tom, Shi, Mijie   +3 more
openaire   +2 more sources

MHD turbulence and heating of the open field-line solar corona [PDF]

, 2003
This paper discusses the possibility that heating of the solar corona in open field-line regions emanating from coronal holes is due to a nonlinear cascade, driven by low-frequency or quasi-static magnetohydrodynamic fluctuations.
Dmitruk, Pablo, Milano, L., Matthaeus, William H., Dmitruk, P., Milano, L. J., Matthaeus, W. H., Mullan, D. J., Oughton, Sean, S. Oughton, P. Dmitruk, W. H. Matthaeus, L. Milano, Oughton, S., D. J. Mullan   +13 more
core   +1 more source

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., Terradas, J., Temmer, M.   +2 more
openaire   +2 more sources

Impulsive Solar Energetic Particle Events: Extreme-Ultraviolet Waves and Jets

Frontiers in Astronomy and Space Sciences, 2022
Impulsive solar energetic particle (ISEP) events show peculiar elemental composition, with enhanced 3He and heavy-ion abundances, markedly different from our Solar System composition.
Radoslav Bučík
doaj   +1 more source

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

From the Sun to the Earth: The 13 May 2005 Coronal Mass Ejection [PDF]

, 2010
We report the results of a multi-instrument, multi-technique, coordinated study of the solar eruptive event of 13 May 2005. We discuss the resultant Earth-directed (halo) coronal mass ejection (CME), and the effects on the terrestrial space environment ...
Chashei, I. V., Giunta, A. S., B. V. Jackson, Mikic Z, Chashei IV, Manoharan, PK, Bisi, MM, Jackson, BV, Tokumaru, M., Shishov, VI, Shishov, V. I., A. S. Giunta, M. Tokumaru, Owens, M. J., Pintér, B., S. A. Tyul’bashev, Aguilar-Rodriguez, E., A. G. Wood, Fallows, RA, Linker, J. A., Owen, C. J., Breen, AR, Bisi, M. M., Linker JA, Riley, P., Tokumaru, M, Owens, MJ, Wood, A. G., Manoharan PK, Riley P, Clover, J. M., J. A. Linker, Giunta AS, Glubokova, S. K., Tokumaru M, Jackson BV, Pintér, B, M. S. Hamilton, E. A. Jensen, Shishov VI, Morgan, H., H. Morgan, Fallows RA, Walsh, A. P., S. K. Glubokova, Glubokova SK, Walsh, AP, Fujiki, K., Gonzalez-Esparza A, Jensen, EA, Hamilton, M. S., Manoharan, P. K., Owens MJ, J. M. Clover, M. J. Owens, Tyul’bashev, S. A., Hick, PP, K. Fujiki, Jensen EA, Clover, JM, Breen AR, B. Pintér, Hamilton, MS, Hick PP, A. P. Walsh, Wood AG, P. Riley, Agalya, G, Bisi MM, Z. Mikić, R. A. Fallows, P. P. Hick, Hick, P. P., M. M. Bisi, Clover JM, Pinter B, Wood, AG, Fujiki, K, Tyul'bashev SA, Fallows, R. A., C. J. Owen, Breen, A. R., Walsh AP, Giunta, AS, Gonzalez-Esparza, A., A. R. Breen, G. Agalya, Fujiki K, Mikić, Z., P. K. Manoharan, Chashei, IV, Aguilar-Rodriguez E, Agalya G, Jackson, B. V., Tyul’bashev, SA, Aguilar-Rodriguez, E, Morgan H, Mikić, Z, Owen CJ, Glubokova, SK, I. V. Chashei, Hamilton MS, Jensen, E. A., A. Gonzalez-Esparza, Riley, P, Owen, CJ, Agalya, G., Gonzalez-Esparza, A, Morgan, H, Linker, JA, E. Aguilar-Rodriguez, V. I. Shishov   +111 more
core   +1 more source

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