论文标题
Maser耀斑由抽水和背景辐射的变化驱动
Maser Flares Driven by Variations in Pumping and Background Radiation
论文作者
论文摘要
我们通过在maser云的3D模型中改变泵速度或辐射的背景水平来模拟maser耀斑。我们研究了不同云形状，饱和度和观点的影响。对于具有均匀和内部变化不饱和反转的云的云考虑考虑结果。抽水和背景变化由几种不同的驱动功能表示，其中一些是从观察值中得出的光曲线。我们以三个可观察的参数（达到的最大磁通密度，变异性指数和占空比周期）来总结泵送变异性结果。我们演示了从随机角度查看非球体对象可能导致的通量密度的典型范围。耀斑的最佳物体是泛云，被视为其长轴，并从不饱和条件驱动到至少适度的饱和度。背景水平变化的结果在质量上与可变泵化的结果不同，因为它们倾向于在中等饱和的条件下产生低通量密度的短间隔，并且足够的可变性与强烈爆炸一致。可变背景模型通常比具有可变抽水的占空比要高得多。
We simulate maser flares by varying either the pump rate or the background level of radiation in a 3D model of a maser cloud. We investigate the effect of different cloud shapes, saturation levels and viewpoints. Results are considered for clouds with both uniform and internally variable unsaturated inversion. Pumping and background variations are represented by several different driving functions, some of which are light curves drawn from observations. We summarise the pumping variability results in terms of three observable parameters, the maximum flux density achieved, a variability index and duty cycle. We demonstrate typical ranges of the flux density that may result from viewing an aspherical object from random viewpoints. The best object for a flare is a prolate cloud, viewed close to its long axis and driven from unsaturated conditions to at least modest saturation. Results for variation of the background level are qualitatively different from the variable pumping results in that they tend to produce short intervals of low flux density under conditions of moderate saturation and sufficient variability to be consistent with strong flaring. Variable background models typically have a significantly higher duty cycle than those with variable pumping.
