Galactic Neutral Hydrogen Emission Profile Structure

摘要: Analysis of Galactic neutral hydrogen emission profiles that have been corrected for sidelobe radiation confirm the existence three distinct component line width regimes identified by Verschuur & Magnani in 1994. In addition, a fourth becomes recognizable data directions low total column density. The are around 50 km s-1 (component 1a), 31 1b), 13 2), and 5.2 narrow lines arising from cool H I 3). this paper, new presented compared with previously published results. possible origin is briefly examined, it concluded interpretation needed, one involves plasma phenomenon known as critical ionization velocity, which will be fully discussed subsequent paper.