Results 31 to 40 of about 2,729 (231)

MHD Waves and Oscillations in Solar Coronal Waveguides [PDF]

, 2018
Perturbations of coronal structures by impulsive events such as solar flares generate waves which are interpreted with MHD theory. These waves allow plasma processes to be studied, and seismology of the local plasma parameters to be performed.
openaire   +1 more source

MHD waves in the solar north polar coronal hole

Astronomische Nachrichten, 2010
AbstractThe effects, hitherto not treated, of the temperature and the number density gradients, both in the parallel and the perpendicular direction to the magnetic field, of O VI ions, on the MHD wave propagation characteristics in the solar North Polar Coronal Hole are investigated.
Devlen, E., Pekunlu, E. R.
openaire   +3 more sources

Comparison of Damping Mechanisms for Transverse Waves in Solar Coronal Loops [PDF]

The Astrophysical Journal, 2017
Abstract We present a method to assess the plausibility of alternative mechanisms to explain the damping of magnetohydrodynamic transverse waves in solar coronal loops. The considered mechanisms are resonant absorption of kink waves in the Alfvén continuum, phase mixing of Alfvén waves, and wave leakage.
María Montes-Solís, Iñigo Arregui
openaire   +2 more sources

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

Investigating Alfvénic wave propagation in coronal open-field regions

, 2015
The physical mechanisms behind accelerating solar and stellar winds are a long-standing astrophysical mystery, although recent breakthroughs have come from models invoking the turbulent dissipation of Alfvén waves.
Morton, Richard, Tomczyk, Steve, Pinto, Rui   +2 more
core   +1 more source

Solar cycle dependence of scaling in solar wind fluctuations [PDF]

, 2008
In this review we collate recent results for the statistical scaling properties of fluctuations in the solar wind with a view to synthesizing two descriptions: that of evolving MHD turbulence and that of a scaling signature of coronal origin that ...
B. Hnat, Hnat, B., Kiyani, K., S. C. Chapman, K. Kiyani, Chapman, S. C., Chapman, Sandra C.   +6 more
core   +1 more source

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

A solar storm observed from the Sun to Venus using the STEREO, Venus Express, and MESSENGER spacecraft [PDF]

, 2009
The suite of SECCHI optical imaging instruments on the STEREO-A spacecraft is used to track a solar storm, consisting of several coronal mass ejections (CMEs) and other coronal loops, as it propagates from the Sun into the heliosphere during May 2007 ...
Forsyth, R., Coates AJ, Davies, JA, Thernisien, A, Brown, D., Harrison, R. A., R. J. Forsyth, Lockwood, M., C. J. Davis, Crothers, S., Frahm, R. A., Carr, CM, M. Grande, Bewsher, D, Winningham JD, Savani, NP, Howard, RA, Eyles, C.J., Tsang S, Davis CJ, M. Fränz, N. P. Savani, Howard, R. A., Grande, M, Hapgood, M., Savani NP, Winningham, JD, Crothers SR, Grande, M., Savani, N.P., Harrison RA, Davies, J. A., Bewsher, D., Forsyth, RJ, Davies, J., M. Hapgood, Anderson, B., Sheeley, N.R., Winningham, J., Eyles, C., Tsang, S., Hapgood, M, Fränz M, Whittaker I, C. J. Eyles, G. H. Jones, Davies JA, Grande M, Harrison, R.A., R. A. Frahm, J. D. Winningham, Forsyth, R.J., Whittaker, I., Brown DS, Anderson, B, Zhang, T.-L., S. Tsang, Howard, R., R. A. Howard, Forsyth RJ, M. Lockwood, Sheeley, N. R., Brown, Daniel Stephen, Winningham, J. D., Frahm, R.A., Bewsher D, Savani, N., Rouillard AP, Sheeley NR, Zhang, TL, Coates, AJ, Davis, CJ, Lockwood M, Whittaker, I, Savani, N. P., Frahm, R., I. Whittaker, Eyles, C. J., Jones, G. H., Harrison, R., A. Thernisien, Eyles CJ, Thernisien A, Davis, C., Forsyth, R. J., Frahm, RA, Davis, C.J., Eyles, Christopher, Thernisien, A., T.-L. Zhang, Rouillard, A., Zhang, T., Rouillard, A.P., Bewsher, Danielle, Rouillard, A. P., Zhang, T. -L., Howard RA, Crothers, S.R., Jones, G.H., Fränz, M., Sheeley, N., D. S. Brown, Tsang, S, Rouillard, AP, Davis, C. J., Hapgood M, Brown, D.S., Jones, G., S. R. Crothers, Carr CM, A. J. Coates, Carr, C.M., B. Anderson, Winningham, J.D., Frahm RA, A. P. Rouillard, J. A. Davies, Scott, Chris J., Davies, J.A., Coates, A., C. M. Carr, Carr, C. M., Howard, R.A., Coates, A.J., Harrison, RA, N. R. Sheeley, Fraenz, M., Brown, DS, Brown, D. S., Jones GH, Sheeley, NR, Lockwood, M, Coates, A. J., D. Bewsher, Crothers, S. R., Zhang T, Carr, C., Crothers, SR, Jones, GH, Anderson B, Fränz, M, R. A. Harrison   +141 more
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Coronal Heating & Solar Wind Acceleration by Drift Waves

Journal of Physics: Conference Series, 2015
An alternative approach to the coronal heating problem, based on the theory of drift waves, has been proposed. The drift mode is the only mode that is able to survive the drastically different (collisional/collisionless) extremes in the different layers of the solar atmosphere. As a matter of fact, this mode is over stable, i.e.
Poedts, S., Kanella, Ch, Lapenta, G.
openaire   +1 more source

Introduction to special issue on high speed solar wind streams and geospace interactions (HSS-GI) [PDF]

, 2009
This special issue of the Journal of Atmospheric and Solar-Terrestrial Physics is devoted to research into high speed solar wind streams (HSSs) and their effects on the region of near-Earth space commonly known as ‘geospace’.
Morley, S.K., Denton, M.H, Horne, Richard B, Borovsky, J.E., Tsurutani, B.T., Denton, M.H., Horne, R.B., McPherron, R.L.   +7 more
core   +1 more source