نتایج جستجو برای: solar wind velocity
تعداد نتایج: 325019 فیلتر نتایج به سال:
The present spectroscopic study of the ultraviolet coronal emission in a polar hole, detected on April 6–9, 1996 with the Ultraviolet Coronagraph Spectrometer aboard the SOHO spacecraft, identifies the inter–plume lanes and background coronal hole regions as the channels where the fast solar wind is preferentially accelerated. In inter–plume lanes, at heliocentric distance 1.7 R ⊙ , the corona ...
In the present study, investigated an energy production system using three types of renewable energy: solar, wind and ocean thermal energy with climatic conditions and close to areas with high potential for the OTEC system, Has a good position in terms of wind speed and solar radiation, used them as energy sources. The proposed system is designed and evaluated based on the total daily electrici...
M\Ian's knowledge of the properties of interplanetary space has advanced radically since 1962, the major part of this advance occurring since the commencement of the International Years of the Quiet Sun. The IQSY has, in fact, been quite unique in that it has seen the augmentation of the extensive synoptic studies of both geophysical and solar phenomena such as were mounted during the IGY and i...
Although fossil fuels consumption may causes to rapid economic growth, but due to related pollutants and its consequences, the world has suffered from climate changes. Moreover, fossil fuel resources such as petroleum, gas, coal and uranium are being exhausted rapidly in the last decades. Therefore, seeking an appropriate as well as low-cost alternative for the above-mentioned energy carriers i...
Many stars are known to drive stellar winds of the solar wind type. Thus when moving through the ambient interstellar medium these stars not simply ionize this medium but also interact as moving stellar wind systems. Only neutral interstellar gas components can directly enter the inner stellar wind region and there undergo charge exchange reactions with the supersonic stellar wind protons. Ther...
[1] The solar wind is filled with strong current sheets and sudden velocity shears; often the two are co-located. Sudden velocity shears at 1 AU are statistically analyzed using ACE measurements from 1998 to 2008. The occurrence rates of passage and the orientations of the shear planes are examined. For shear layers with vector velocity changes |Dv| > 50 km/s, an average of 12 pass the Earth pe...
The nongyrotropy of newborn ions in solar wind plasmas is studied by means of one-dimensional electromagnetic hybrid computer simulations of homogeneous plasmas. It is found that, contrary to the previous theory of nongyrotropy, the homogeneous injections of newborn ions can also produce the nongyrotropy of newborn ions (partial nongyrotropy). However, the inhomogeneous injections of newborn io...
[1] Three-dimensional multifluid simulations of the solar wind interaction with a magnetized Mars are used to determine both the effect of the crustal magnetic field on ionospheric loss rate and the ionospheric loss rate as a function of solar wind conditions. Ionospheric losses on the order of 10 O2 + ions per second are found for quiet solar wind conditions. This is of the same order as that ...
The coronal slow shock has been changes of alpha particles' velocity, density, and predicted to exist embedded in large coronal holes temperature have been published, both for fast at 4-10 solar radii. We use a three-fluid model to interplanetary shocks and for the Earth's bow study the jumps in minor ion properties across a slow shock such as the coronal slow shock. We formulate the jump condi...
[1] While the terrestrial aurorae are known to be driven primarily by the interaction of the Earth’s magnetosphere with the solar wind, there is considerable evidence that auroral emissions on Jupiter and Saturn are driven primarily by internal processes, with the main energy source being the planets’ rapid rotation. Prior observations have suggested there might be some influence of the solar w...
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