Excitation of millimeter and submillimeter water masers
Excitation of millimeter and submillimeter water masers
复制标题
毫米和亚毫米水脉泽的激发
DOI：
10.1086/169685
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
G. Melnick
中科院分区：
文献类型：
--
作者：
D. Neufeld;G. Melnick
考虑了星际水和星周水在毫米波和亚毫米波跃迁中脉泽辐射的激发。逃逸概率方法被用来确定在349旋转状态下的气体的温度，密度，水的丰度，和辐射场的不同条件下的邻水和对位水的平衡布居。结果表明，在这些条件下，相信占主导地位的晚型恒星周围和恒星形成区域内，强烈的毫米和亚毫米水脉泽发射可以产生碰撞激发H2。几个脉泽跃迁的强度可以接近22 GHz谱线的强度。水脉泽线，可以观察到从山顶设施和那些将需要空中或空间平台的指示。图中显示了每个微波激射器跃迁呈现峰值发射的参数空间的确切部分。参考文献42篇。
The excitation of maser emission in millimeter and submillimeter transitions of interstellar and circumstellar water is considered. An escape probability method is used to determine the equilibrium populations in 349 rotational states of both ortho- and para-water under varying conditions of gas temperature, density, water abundance, and radiation field. It is shown that, under those conditions believed to prevail around late-type stars and within star-forming regions, strong millimeter and submillimeter water maser emission can be generated by collisional excitations by H2. Several maser transitions can have strengths close to that of the 22 GHz line. The water maser line which can be observed from mountaintop facilities and those which will require air- or space-borne platforms are indicated. The exact portion of parameter space in which each maser transition exhibits peak emission is shown. 42 refs.