论文标题
临界电离速度效应在星际空间中的作用和氦气的丰度
The Role of the Critical Ionization Velocity Effect in Interstellar Space and the Derived Abundance of Helium
论文作者
论文摘要
高斯对新的高分辨率星际星际21-CM中性氢发射曲线结构的分析更清楚地揭示了先前报道的氦气速度（{\ it civ}）的先前报道的特征（34 km s $ s $^{ - 1} $）。目前的分析包括1496个组件线宽度，可在银河纬度的两个天空区域的178个中性氢概况范围内，约$ -50 $^\ Circ $，远离银河平面。此处考虑的新数据允许计算星际的氦气，并且派生值为0.095 $ \ pm $ 0.020与基于太阳能数据的宇宙丰度的0.085值相比，相比之下。尽管尚不清楚产生{\ it civ}效应的确切机制，但我们的结果可能会为进一步研究该机制运作提供进一步的动力。
Gaussian analysis of new, high-angular-resolution interstellar 21-cm neutral hydrogen emission profile structure more clearly reveals the presence of the previously reported signature of the critical ionization velocity ({\it CIV}) of Helium (34 km s$^{-1}$). The present analysis includes 1496 component line widths for 178 neutral hydrogen profiles in two areas of sky at galactic latitudes around $-$50$^\circ$, well away from the galactic plane. The new data considered here allow the interstellar abundance of Helium to be calculated, and the derived value of 0.095 $\pm$ 0.020 compares extremely well with the value of 0.085 for the cosmic abundance based on solar data. Although the precise mechanisms that give rise to the {\it CIV} effect in interstellar space are not yet understood, our results may provide additional motivation for further theoretical study of how the mechanism operates.
