نتایج جستجو برای: polar plumes
تعداد نتایج: 49061 فیلتر نتایج به سال:
We examine spectral time series of coronal line Mg ix 368 A and transition region line O v 629 A, observed with the Coronal Diagnostic Spectrometer (CDS) onboard the SOHO spacecraft. Primarily we were looking for intensity and velocity oscillations in polar plumes, however by chance we detected a giant macro-spicule at the limb and were able to follow its dynamical structure. Blue and red-shift...
The polar regions of the solar corona exhibit during solar minima very faint ray-like structures which apparently outline the lines of polar magnetic field. Usually they are named plumes in the solar coronal literature. In order to understand the spatiotemporal characteristics of these plumes we analyze a sequence of 400 continuous observations covering a period of 3 days. For such analysis we ...
We examine spectral time series of coronal line Mg ix 368 Å and transition region line O v 629 Å, observed with the Coronal Diagnostic Spectrometer (CDS) onboard the SOHO spacecraft. Primarily we were looking for intensity and velocity oscillations in polar plumes, however by chance we detected a giant macro-spicule at the limb and were able to follow its dynamical structure. Blue and red-shift...
Enceladus is one of the most remarkable satellites in the solar system, as revealed by Cassini’s detection of active plumes erupting from warm fractures near its south pole. This discovery makes Enceladus the only icy satellite known to exhibit ongoing internally-driven geological activity. The activity is presumably powered by tidal heating maintained by Enceladus’ 2:1 mean-motion resonance wi...
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