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首页> 外文期刊>The Astrophysical journal >Astrophysical Maser Radiation from a Turbulent Medium: Application to 25 GHz Methanol Masers
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Astrophysical Maser Radiation from a Turbulent Medium: Application to 25 GHz Methanol Masers

机译:来自湍流介质的天体物理Maser辐射:在25 GHz甲醇Masers中的应用

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Spectral and spatial distributions are calculated for astrophysical maser radiation that emerges from a turbulent medium. Turbulent-velocity fields are created by sampling from Kolmogorov-like distributions. The maps of maser emission created in a turbulent medium appear as if the emission results from a collection of isolated clumps moving with different velocities, even though the physical quantities (other than velocity) are constant within the medium. A detailed comparison is made with observational data about the 25 GHz methanol masers in OMC-1. There is evidence that key simplifications for the calculations—unsaturated masing and uniform excitation—are applicable for these masers. For the actual Kolmogorov distribution, the images are smaller and more numerous than are observed. The spectra also do not exhibit the observed irregularities. Velocity distributions that are somewhat steeper than the Kolmogorov power law lead to calculated images and spectra that reproduce characteristic features of the observations.
机译:计算出从湍流介质中出现的天体物理激射辐射的光谱和空间分布。通过从类似Kolmogorov的分布中采样来创建湍流速度场。即使在介质中的物理量(速度除外)恒定,在湍流介质中产生的maser排放图也似乎是排放源来自以不同速度运动的孤立团块的集合。与有关OMC-1中25 GHz甲醇激射的观测数据进行了详细的比较。有证据表明,计算的关键简化方法是不饱和激振和均匀激励,适用于这些激振器。对于实际的Kolmogorov分布,图像比所观察到的更小且数量更多。光谱也没有表现出观察到的不规则性。比Kolmogorov幂定律更陡的速度分布会导致计算出的图像和光谱重现观测的特征。

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