Observed emission rates in sprite streamer heads
Observed emission rates in sprite streamer heads
复制标题
观察到的精灵流光头的发射率
DOI：
10.1029/2007gl029881
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发表时间：
2007
影响因子：
5.2
通讯作者：
D. D. Sentman
中科院分区：
文献类型：
--
作者：
H. Stenbaek;M. McHarg;T. Kanmae;D. D. Sentman
在10,000帧/秒的SPRITE观测显示，明亮的流光头在∼107m/S移动时会形成卷须和分支。流光头通常在上下移动时变亮，经常使探测器饱和。我们在这里给出了推断的排放率。据推测，流光头比我们140米的空间分辨率要小，因此，它们必须被视为点源。假设光发射以N21P波段为主，并与图像中的恒星相比较，得到单个流光头的总发射率在41021到31024光子/S之间，对于25m的流光头，平均亮度范围为9108-51011R，或者，当体积发射率为81011光子/cm~3/S时，尺寸范围为10到100m。
Sprite observations at 10,000 fps have shown tendrils and branches to be formed by bright streamer heads moving at ∼107 m/s. The streamer heads typically brighten as they move up or down, often saturating the detector. We present here inferred emission rates. The streamer heads are presumably smaller than our 140 m spatial resolution and, therefore, they have to be treated as point sources. The optical emissions are assumed to be dominated by the N2 1P band and comparing with stars in the images we find total emission rates in individual streamer heads ranging from 4 1021 to 3 1024 photons/s. For a 25 m streamer head the range of average brightness would be 9 108–5 1011 R. Alternatively, using a volume emission rate of 8 1011 photons/cm3/s the size range would be 10 to 100 m.