UV背景中的时间变化
Time variations in the UV background
摘要：
我们发现，在GALEX任务的10年寿命中，漫射紫外背景的变化在10天左右的尺度上。这些变化仅在GALEX的近紫外波段明显，并且最有可能与太阳NUV通量亮度变化引起的黄道光变化有关。NUV中的变化可以高达200个光子单位，相当于黄道光的约15%或总NUV漫射辐射的<10%。对GALEX的远紫外波段没有影响。进一步的工作将需要更好的观测，特别是为了调查这一组成部分的目的，将难以获得。
英文摘要：
We have found variations in the diffuse ultraviolet background on the scale about 10 days over the 10 year life of the GALEX mission. These variations are only apparent in the near-ultraviolet band of GALEX and are most likely related to variations in the zodiacal light due to brightness variations of the solar NUV flux. The variations can be as high as 200 photon units in the NUV, amounting to about 15 % of the zodiacal light or < 10 % of the total NUV diffuse radiation. There is no effect on the far-ultraviolet band of GALEX. Further work will require better observations chosen specifically for the purpose of investigating this component and will be difficult to obtain.
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