OH MASERS IN W33A
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摘要: 本文给出了W33A在两个(2Ⅱ3/2 J=3/2, F=1→1和F=2→2)跃迁频率上的左右图偏振OH脉泽辐射谱线,采用细管和球模型,获得脉泽活动区的氢分子数密度近似107cm-3.为了获得1046s-1量级脉泽光子发射率,两种模型一致要求抽运率为1(OH)cm-3s-1,但球型脉泽活动区要求较高的抽运效率。Abstract: The circular polarization spectra in W33A are observed on emission from the 2Ⅱ3/2 J=3/2, F=1→1 and F=2→2 transition of OH. The hydrogen density in the masing region is infered about 107 cm-3 in both the long thin tube and spherical maser,Apump rate of ~1(OH) cm-3s-1 is required in both geometries for the photon emission rate of ~1046s-1. The required pump efficiency is higher in the sphericalmaserthan in the thin tube.
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Key words:
- interstellar medium /
- Maser
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