Zobrazeno 1 - 10
of 331
pro vyhledávání: '"Grappin, R."'
The dynamical response of the solar corona to surface and sub-surface perturbations depends on the chromospheric stratification, and specifically on how efficiently these layers reflect or transmit incoming Alfv\'en waves. While it would be desirable
Externí odkaz:
http://arxiv.org/abs/1301.0341
We present a mechanism for the formation of the low frequency 1/f magnetic spectrum based on numerical solutions of a shell reduced-MHD model of the turbulent dynamics inside the sub-Alfv\'enic solar wind. We assign reasonably realistic profiles to t
Externí odkaz:
http://arxiv.org/abs/1203.6219
The turbulent spectrum of magnetic fluctuations in the solar wind displays a spectral break at ion characteristic scales. At electron scales the spectral shape is not yet completely established. Here, we perform a statistical study of 102 spectra at
Externí odkaz:
http://arxiv.org/abs/1111.5649
Publikováno v:
AIP Conf.Proc.1216:80-83,2010
We present the first results of simulations of giant polar plumes and coronal flows. We use a 2.5D axisymmetric MHD numerical model of an isothermal corona and slow solar wind. A plume is generated just above asmall magnetic bipole embedded in an uni
Externí odkaz:
http://arxiv.org/abs/0912.3226
Autor:
Alexandrova, O., Saur, J., Lacombe, C., Mangeney, A., Schwartz, S. J., Mitchell, J., Grappin, R., Robert, P.
Turbulent spectra of magnetic fluctuations in the free solar wind are studied from MHD to electron scales using Cluster observations. We discuss the problem of the instrumental noise and its influence on the measurements at the electron scales. We co
Externí odkaz:
http://arxiv.org/abs/0912.2668
Publikováno v:
AIP Conf.Proc.1216:28-31,2010
In a recent work Grappin et al. [1] have shown that low- frequency movements can be transmitted from one footpoint to the other along a magnetic loop, thus mimicking a friction effect of the corona on the photosphere, and invalidating the line-tying
Externí odkaz:
http://arxiv.org/abs/0912.1497
We investigate how wave propagation is modified by the presence of heat sources and sinks, in the simple 1D, hydrodynamical case, including chromosphere and solar wind. We integrate the time-dependent hydrodynamic equations of the solar wind with sph
Externí odkaz:
http://arxiv.org/abs/0710.0899
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