The diffuse ultraviolet foreground
The diffuse ultraviolet foreground
复制标题
漫射紫外线前景
DOI：
10.1007/s10509-013-1612-1
复制
发表时间：
2013
影响因子：
1.9
通讯作者：
Jayant Murthy
中科院分区：
文献类型：
--
作者：
Jayant Murthy
近地轨道（LEO）的紫外线观测必须处理由气辉和黄道光组成的前景，这取决于观测方向和观测的日期和时间。我们使用GALEX航天器的全天观测发现，气辉可以分为依赖于太阳角度的基线和仅依赖于当地午夜时间的分量。黄道光只能在GALEX的近紫外波段（2321 Å）观测到，与可见的黄道光成正比，但颜色为0.65，表明尘埃颗粒在紫外波段的反射率较低。
Ultraviolet observations from low Earth orbit (LEO) have to deal with a foreground comprised of airglow and zodiacal light which depend on the look direction and on the date and time of the observation. We have used all-sky observations from the GALEX spacecraft to find that the airglow may be divided into a baseline dependent on the sun angle and a component dependent only on the time from local midnight. The zodiacal light is observable only in the near ultraviolet band (2321 Å) of GALEX and is proportional to the zodiacal light in the visible but with a color of 0.65 indicating that the dust grains are less reflective in the UV.