论文标题
N $ _2 $ comet C/2016 R2的生产率（Panstarrs）
The N$_2$ Production Rate in Comet C/2016 R2 (PanSTARRS)
论文作者
论文摘要
Comet C/2016 R2（Panstarrs）的观察结果表明，N $ _2^+$的发射带异常明亮，这是彗星频谱中有史以来最强的。另外，与其他彗星相比，它的CN似乎很差，并且在H $ _2 $ o中耗尽了。在这里，我们使用haser模型量化了n $ _2^+$排放线的n $ _2 $生产率。我们为N2产生N2+的有效父母和女儿尺度。这是此类参数的第一个直接测量。使用N2+的修订后的荧光效率，推断出得出的分子氮的生产速率为Q（n $ _2 $）〜1 $ \ times 10^{28} $ Molecules.s-s-1，平均为11、12和13，2018年2月13日，这是任何已知彗星的最高。基于Q（CO）〜1.1 $ \ times 10^{29} $ molecules.s-1的共同生产率，我们发现Q（n $ -2 $）/q（co）〜0.09，这与N $ _2^+$/co $ $^+$比率一致，源自观察到的N $ _2^+$ $ _2^+$ emistion n $ _2^+$ em em em em em em em em em em em em em em em em em em em em em em em Incor。我们还衡量了三个观测夜之间的生产率的显着差异，根据平均值，Q（n $ _2 $）的Q（n $ _2 $）变化为20％
Observations of comet C/2016 R2 (PanSTARRS) have revealed exceptionally bright emission bands of N$_2^+$, the strongest ever observed in a comet spectrum. Alternatively, it appears to be poor in CN compared to other comets, and remarkably depleted in H$_2$O. Here we quantify the N$_2$ production rate from N$_2^+$ emission lines using the Haser model. We derived effective parent and daughter scalelengths for N2 producing N2+. This is the first direct measurement of such parameters. Using a revised fluorescence efficiency for N2+, the resulting production rate of molecular nitrogen is inferred to be Q(N$_2$) ~ 1 $\times 10^{28}$ molecules.s-1 on average for 11, 12, and 13 Feb. 2018, the highest for any known comet. Based on a CO production rate of Q(CO) ~ 1.1 $\times 10^{29}$ molecules.s-1, we find Q(N$-2$)/Q(CO)~0.09, which is consistent with the N$_2^+$/CO$^+$ ratio derived from the observed intensities of N$_2^+$ and CO$^+$ emission lines. We also measure significant variations in this production rate between our three observing nights, with Q(N$_2$) varying by plus or minus 20% according to the average value
