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11.
A magnetodynamic model to deal with the acceleration and collimation of jets as a part of the global process of gravitational
contraction of the magnetized gas to the central gravitator is discussed. We first review its application to the star forming
jet case with several observational supporting evidence. Then, a justification will be given for the extension of this to
the AGN jet case, despite of the difference in orders of magnitudes in the scales as well as in the physical parameters. The
results of actual application of this magnetodynamic mechanism to the AGN case will be presented together with the discussions
for the origin of the radio lobes and hotspots, and we show that this mechanism can explain the enhancement of accretion and
the formation of the jet + lobe system consistently with the genetic consideration of the system.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
12.
Akinobu Miyakoshi Makoto Taniguchi Yasukuni Okubo Takeshi Uemura 《Physics of the Earth and Planetary Interiors》2005,152(4):335-342
Subsurface temperature is affected by heat advection due to groundwater flow and surface temperature changes. To evaluate their effects, it was implemented the measurements of temperature-depth profile (T-D profile) and the continuous monitoring of soil temperature in the southern part of Kamchatka which has not affected by human activity. Additionally, stable isotopic compositions of surface water and groundwater were analyzed. T-D profile and stable isotopic compositions show groundwater flow system is differ from the shallow aquifer to the deep aquifer. In the shallow aquifer, T-D profile suggests the existence of upward groundwater flux. On the other hand, the annual variation of soil temperature is divided into the large variation period (VP) and the stable period (SP) by the magnitude of daily and seasonal variation. VP and SP correspond to the summer and the winter season, respectively, and it considers that the difference between VP and SP is caused by the effect of snow cover. Therefore, the T-D profile is affected by not only upward groundwater flux but also the surface warming particularly in the summer season (VP). 相似文献