日食爆发时,日冕层释放出大量铁离子-凯发k8官网

日食爆发时,日冕层释放出大量铁离子
文章来源:未知 文章作者:meng 发布时间:2010-01-05 03:30 字体: [ ] 
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solar 1 attempting to unlock the mysteries of the solar corona日冕 have found another piece of the puzzle by observing the sun's outer atmosphere during eclipses. ground-based observations reveal the first images of the solar 2 in the near-infrared 3 line of highly ionized电离 iron, or fe xi 789.2 nm. the observations were taken during total solar eclipses in 2006, 2008, and 2009 by astrophysicist adrian daw of nasa's goddard space flight center in greenbelt, md., with an international team of scientists led by shadia habbal from the university of hawaii's institute for astronomy (ifa).

"the first image of the corona in fe xi 789.2 nm was taken during the total solar eclipse of march 29, 2006," said daw.

the images revealed some surprises. most 4, that the emission extends out at least three solar radii半径—that's one-and-a-half times the sun's width at its equator赤道, or middle—above the surface of the sun, and that there are localized regions of enhanced 5 for these iron ions.

combined with observations of other iron charge states, the observations yield the two-dimensional distribution of electron temperature and charge-state measurements for the first time, and establish the first direct link between the distribution分配,分布 of charge states in the corona and in interplanetary space行星际空间. "these are the first such maps of the 2-d distribution of coronal electron temperature and ion离子 charge state," said daw.

mapping the distribution of electron temperature and iron charge states in the corona with total solar eclipse observations represents an important step in understanding the solar corona and how space weather impacts earth.



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1 18316b43c980524885c1a898ed1528b1     
物理学家( physicist的名词复数 )
参考例句:
  • for many particle physicists, however, it was a year of frustration. 对于许多粒子物理学家来说,这是受挫折的一年。 来自英汉非文学 - 科技
  • physicists seek rules or patterns to provide a framework. 物理学家寻求用法则或图式来构成一个框架。
2 jy4z4     
n.日冕
参考例句:
  • the corona gains and loses energy continuously.日冕总是不断地获得能量和损失能量。
  • the corona is a brilliant,pearly white,filmy light,about as bright as the full moon.光环带是一种灿烂的珠白色朦胧光,几乎像满月一样明亮。
3 vjnz4     
n.发出物,散发物;发出,散发
参考例句:
  • rigorous measures will be taken to reduce the total pollutant emission.采取严格有力措施,降低污染物排放总量。
  • finally,the way to effectively control particulate emission is pointed out.最后,指出有效降低颗粒排放的方向。
4 1hex9     
adv.值得注意地,显著地,尤其地,特别地
参考例句:
  • many students were absent,notably the monitor.许多学生缺席,特别是连班长也没来。
  • a notably short,silver-haired man,he plays basketball with his staff several times a week.他个子明显较为矮小,一头银发,每周都会和他的员工一起打几次篮球。
5 rodzz     
n.密集,密度,浓度
参考例句:
  • the population density of that country is 685 per square mile.那个国家的人口密度为每平方英里685人。
  • the region has a very high population density.该地区的人口密度很高。
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