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RAT4COM: A RADIATIVE TRANSFER MODEL FOR WATER IN COMETS

机译:RAT4COM:彗星中水分的辐射转移模型

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摘要

We present an improved version of rat4com, a radiation transfer model for water rotational line emission in cometary coma. The original model is limited to the rotational transitions of ortho-water for a comet with a constant water production rate (Bensch & Bergin, 2004). With the improved version of rat4com we include para-water levels and study the impact of newer, more accurate water-electron collision rates on the predicted line emission. Additionally, we present results for a model where the water production rate is temporarily elevated. It is an initial attempt to model the emission of a comet undergoing an outburst. The prospects of water rotational line observations with HIFI on the Herschel Space Observatory are discussed.
机译:我们提出了rat4com的改进版本,这是彗星彗星中水旋转线发射的辐射传递模型。原始模型仅限于具有恒定水生产率的彗星的原水旋转跃迁(Bensch&Bergin,2004)。使用rat4com的改进版本,我们可以包括超水位,并研究更新,更准确的水电子碰撞速率对预测的线路发射的影响。此外,我们提出了模型的结果,其中水的生产率暂时提高了。这是对经历爆发的彗星发射进行建模的最初尝试。讨论了在赫歇尔空间天文台上用HIFI观测水旋转线的前景。

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