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新地平线号侦测到木星的磁场与太阳风的相互作用
February 9 , 2007
2007年2月9日
This figure shows an initial color-coded spectrogram produced by the Solar Wind Around Pluto (SWAP) instrument on New Horizons at about 4.9 astronomical units from the Sun (about 0.4 astronomical units, or 60 million kilometers, upstream from Jupiter). Interplanetary shocks passed over the New Horizons spacecraft on January 11 and January 14, causing the abrupt jumps in solar wind speed; the speed immediately following the latter shock was in excess of 600 kilometers per second. The slowly decreasing speed after the second shock is a rarefaction region, which forms as faster solar wind outruns the slower solar wind behind it. In all, these SWAP observations show a clear solar wind stream structure. Continuing plasma observations such as these will be critical to understanding the solar wind drivers of the Jovian magnetosphere as New Horizons approaches and recedes from Jupiter as well as directly measuring the internal plasma properties of the Jovian magnetosphere as New Horizons flies through this immense magnetic and plasma structure.
大意:
这一图表表明,距太阳约4.9天文单位(60万公里)的木星. 新地平线号进入了木星的磁场,并在1月11日~14日, 太阳风速度突然猛增; 紧接着太阳风的速度超过每秒600公里. 其中表格表明了太阳风的速度.和清楚的了解太阳风流结构.
新地平线号上的太阳风探测仪
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