Observed variations of the exospheric hydrogen density with the exospheric temperature
Observed variations of the exospheric hydrogen density with the exospheric temperature
复制标题
观测到的外层氢密度随外层温度的变化
DOI：
10.1029/ja080i004p00639
复制
发表时间：
1975
影响因子：
--
通讯作者：
J. Bertaux
中科院分区：
文献类型：
--
作者：
J. Bertaux;J. Bertaux
在3re（地球半径）的距离上测量的外逸层氢密度作为外逸层温度的函数。结果表明，随着外逸层温度的升高，外逸层的密度nc降低，但不足以使琼斯逸出通量FJ保持恒定。FJ随外逸层温度的升高可以通过铁的降低来补偿，铁是等离子体层电荷交换中氢损失的测量指标。在温度Tc = 1070°K时，这两种通量等于6.6 × 107个原子cm - 2 s - 1，得到的总逸出通量与30至50公里范围内氢化合物的测量值和理论中间层计算结果一致。
Measurements of exospheric hydrogen densities at a distance of 3 RE (earth radii) are presented as a function of exospheric temperature. They imply that the density nc at the exobase level decreases with exospheric temperature Tc but not enough to keep the Jeans escape flux FJ constant. The increase of FJ with exospheric temperature may be compensated for by the decrease of Fe, which measures the loss of hydrogen by charge exchange in the plasmasphere. The two fluxes would be equal to 6.6 × 107 atoms cm−2 s−1 at a temperature Tc = 1070°K, giving a total escape flux in agreement with measurements of hydrogen compounds in the region from 30 to 50 km and theoretical mesospheric calculations.