Zobrazeno 1 - 10
of 286
pro vyhledávání: '"B. Bavassano"'
Publikováno v:
Nonlinear Processes in Geophysics, Vol 16, Iss 2, Pp 265-273 (2009)
Since the early 90s it was shown that Probability Distribution Functions (PDFs) of small scale differences (fluctuations) of several quantities in space plasmas display significant departures from Gaussianity. The non-Gaussian shape of PDFs was ascri
Externí odkaz:
https://doaj.org/article/8cf4fc9210ed479bb78c76c175a87b31
Publikováno v:
Annales Geophysicae, Vol 27, Pp 877-883 (2009)
The polar solar wind is a fast, tenuous and steady flow that, with the exception of a relatively short phase around the Sun's activity maximum, fills the high-latitude heliosphere. The polar wind properties have been extensively investigated by Ul
Externí odkaz:
https://doaj.org/article/d2c0258e040e443db7cfc8cb73b9f3a2
Publikováno v:
Annales Geophysicae, Vol 25, Pp 1913-1927 (2007)
This study focuses on the role that magnetically dominated fluctuations have within the solar wind MHD turbulence. It is well known that, as the wind expands, magnetic energy starts to dominate over kinetic energy but we lack of a statistical stud
Externí odkaz:
https://doaj.org/article/81685c5499804e239fdfdffc27fd4429
Autor:
B. Bavassano, R. Bruno
Publikováno v:
Annales Geophysicae, Vol 24, Pp 3179-3184 (2006)
Previous analyses have shown that polar wind fluctuations at MHD scales appear as a mixture of Alfvénic fluctuations and variations with an energy imbalance in favour of the magnetic term. In the present study, by separately examining the behavio
Externí odkaz:
https://doaj.org/article/51a15dd5320a4be5909350c4f59cfb73
Publikováno v:
Annales Geophysicae, Vol 24, Pp 2735-2741 (2006)
Statistics associated with the fluctuations in solar wind parameters show a remarkable dependence on the solar activity phase. In particular, we focus our attention on the waiting-time statistics governing the MHD fluctuations of the z-component o
Externí odkaz:
https://doaj.org/article/dd058d842af34a679c238686083d68ad
Publikováno v:
Annales Geophysicae, Vol 24, Pp 785-789 (2006)
The mid-latitude phases of the Ulysses mission offer an excellent opportunity to investigate the solar wind originating near the coronal hole boundaries. Here we report on Alfvénic turbulence features, revealing a relevant presence of in-situ gen
Externí odkaz:
https://doaj.org/article/c95181e5c2e247dba3457b60a1948821
Publikováno v:
Annales Geophysicae, Vol 23, Pp 1025-1031 (2005)
The 3-D structure of the solar wind varies dramatically along the Sun's activity cycle. In the present paper we focus on some properties of the polar solar wind. This is a fast, teneous, and steady flow (as compared to low-latitude conditions) tha
Externí odkaz:
https://doaj.org/article/b745a2bc01d0403d849f9f21d0f15e40
Publikováno v:
Annales Geophysicae, Vol 22, Pp 3751-3769 (2004)
In spite of a large number of papers dedicated to the study of MHD turbulence in the solar wind there are still some simple questions which have never been sufficiently addressed, such as: a) Do we really know how the magnetic field vector ori
Externí odkaz:
https://doaj.org/article/d8e6033a4a1740408483113fb2989e3d
Publikováno v:
Annales Geophysicae, Vol 22, Pp 3721-3727 (2004)
Observations by Ulysses during its second out-of-ecliptic orbit have shown that near the solar activity maximum the solar wind appears as a highly variable flow at all heliolatitudes. In the present study Ulysses data from polar latitudes are comp
Externí odkaz:
https://doaj.org/article/926f4769dda546f9bf2ddaa590060424
Publikováno v:
Annales Geophysicae, Vol 22, Pp 689-696 (2004)
Solar wind compressive fluctuations at MHD scales have been extensively studied in the past using data from spacecraft on the ecliptic plane. In the present study, based on plasma and magnetic field measurements by Ulysses, a statistical analysis
Externí odkaz:
https://doaj.org/article/4cf0db6db05741e5b0d5141b9d0c9d84