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Study of Active Phenomena in the Solar Chromosphere and Corona using High-Speed Microlens-Array Spectrograph

利用高速微透镜阵列摄谱仪研究太阳色球层和日冕的活跃现象

基本信息

批准号：
09440094
负责人：
SUEMATSU Yoshinori
金额：
$ 7.3万
依托单位：
National Astronomical Observatory
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-09440094/
关键词：
Tridimensional Spectroscopy Microlens-Array Solar Flare Line Profile Analysis Cloud model 3次元同時分光

项目摘要

A technique to produce a spectrum of each spatial elements in an extended, two-dimensional field is called tridimensional spectroscopy (two dimension in space and one in wavelength). This research has realized, for the first time, solar tridimensional spectroscopy and applied it for the observations of solar active phenomena. The technique was already applied for the night time observations, but, not for the solar observations because of limitation in small field of view, spatial and spectral resolution. In this research, we could overcome the problems, using large format microlens-array with which we found the solution optimizing Those observing parametars. We showed that the scientific advantages of this technique for studies of localized and transient solar surface phenomena such as flares, because light from the full extent of the structures is sampled simultaneously. The technique has also advantages in being incorporated into high resolution imaging techniques such as adaptive optics or post-facto image processing, and into polarimetric observations easily. In addition, (1) It was shown that we can totally use existing telescope-spectrograph system, simply replacing a slit with the microlens-array and inserting a few optical componentents. (2) Data from this technique can make both monochromatic images and line profile analyses such as the cloud model fitting in two-dimensional field.

一种在扩展的二维场中产生每个空间元素的光谱的技术称为三维光谱学(空间二维，波长一维)。这项研究首次实现了太阳三维光谱，并将其应用于太阳活动现象的观测。该技术已被应用于夜间观测，但由于小视场、空间分辨率和光谱分辨率的限制，尚不适用于太阳观测。在这项研究中，我们可以克服这些问题，使用大面阵微透镜阵列，找到了优化这些观测参数的解决方案。我们证明了这种技术在研究局部和瞬时太阳表面现象(如耀斑)方面的科学优势，因为来自整个结构的光是同时采样的。该技术还具有优势，可以结合到高分辨率成像技术中，如自适应光学或后处理图像处理，并容易地纳入偏振观测。此外，(1)完全可以利用现有的望远镜-光谱仪系统，简单地用微透镜阵列代替一个狭缝，并插入一些光学元件。(2)该技术的数据既可以用于单色图像，也可以用于线型分析，如二维场中的云模型拟合。