Zodiacal Light Observation at Mauna Kea, Hawaii

2000-2003年期间，在夏威夷莫纳克亚山山顶进行了7次黄道光观测。在2000年的第一个财政年度，科比集团开发了一种新的冷却式CCD成像仪，命名为宽视场黄道光阵列探测器成像仪（WIZARD），并对其性能进行了测试。从下一个财政年度开始，其经过改进的高质量CCD成像仪（WIZARD）取得了丰硕成果，如下所示。我们的ZL观测在可见光波段发现了彗星尘埃尾迹和小行星尘埃带。对更雪因亮度中心存在季节性变化。我们发现小行星尘埃带的前景辐射效应在确定亮度中心的精确位置中起着重要的作用。我们从原始数据中去除了由尘埃带引起的这样一个分量，揭示了盖根雪因中心的季节变化可以用云模型的对称面沿着太阳系的内变面来解释.黄道光的亮度在很大范围内观察到的太阳延伸角表明，云模型由复杂的混合物的空间组件。强烈需要进一步监测ZL的亮度。我们无法证实红外卫星发现的与地球共振云的存在。进一步的观测与更大的S/N值是必要的结论，它的存在，在可见光

In the period of 2000-2003, 7 observations of the zodiacal light (ZL) were performed at a summit of Mauna Kea at Hawaii. In the first fiscal year of 2000, a new cooled CCD imager developed in Kobe group, named as Wide-field Imager of Zodiacal light with Array Detector (WIZARD)), had been examined its performance. Its revised high quality CCD imager (WIZARD) has provided fruitful results, shown below, from the next fiscal year.1. The cometary dust trails have been discovered in the visible wavelengths, as well as the asteroidal dust bands by our ZL observations.2. A seasonal variation of the brightness center of the Gegenschein has been detected. We found the effect of the foreground emission from the asteroidal dust bands plays an important role in determination of the precise position of the brightness center. Our removal of such a component caused by the dust bands from our raw data revealed that the seasonal variation of the Gegenschein's center can be explained by the cloud model having its symmetry plane along the in variant plane of the solar system.3. The zodiacal light brightness observed in a wide range of solar elongation angles suggests that the cloud model consists of a complex mixture of the spatial components. Further monitoring of the ZL brightness is strongly needed.4. We could not confirm the existence of resonance cloud with the Earth, which was found by the Infrared Satellite. Further observations with more large S/N values are necessary to conclude its existence in the visible