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Dynamical Studies on Structures of Halley's Comet

哈雷彗星结构的动力学研究

基本信息

批准号：
60460008
负责人：
KOZAI Yoshihide
金额：
$ 4.61万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60460008/
关键词：
Halley's comet motion ジエット

项目摘要

Halley's comet was observed during autumn, 1985 to spring, 1986 by 50cm Schmidt telescope and 91cm telescope at Dodaira Observatory and 188cm telescope at Okayama Astrophysical Observatory with CCD camera at Newton focus. The pictures taken have been already analyzed and utilized by scientists of solar winds in conjunction with results by Suisei and Sakigake of the Institute of Space and Astronautical Sciences.In the photographs taken at the Dodaira Observatory evolutions of tails are clearly exhibited. Data taken with CCD camera with 188cm telescope at Okayama are very exciting, since some of them shos how ion tails were created and how jet streams came out from the nucleus. We observed Halley's comet at Okayama on November 12 and 13 and December 11-14. In November we could see ion tails of the comet. Although it was announced by several astronomers then that they could observe jet streams, we believe that they are not jets but ion tails, since the densitometer results show that the images are circular. However, what we observed on December 12 is a jet since the center of light deviates considerably from the center of the figure.By using these kinds of data which will be collected from many observers oversea we can study how jet streams were correlated with irregularity of the motion of the comet.

1985年秋至1986年春，利用多代拉天文台50cm施密特望远镜、91cm望远镜和冈山天体物理天文台188cm望远镜，用牛顿焦CCD相机对哈雷彗星进行了观测。研究太阳风的科学家们已经对拍摄的照片进行了分析，并将其与空间航天科学研究所的瑞成和Sakigake的研究结果结合起来使用。在多代拉天文台拍摄的照片中，尾巴的进化被清楚地展示出来。冈山天文台188cm望远镜上的CCD相机拍摄的数据非常令人兴奋，因为其中一些数据显示了离子尾巴是如何产生的，以及喷流是如何从原子核中出来的。我们在11月12日和13日以及12月11日至14日在冈山观测了哈雷彗星。11月，我们可以看到彗星的离子尾巴。虽然当时有几位天文学家宣布他们可以观测到喷流，但我们相信它们不是喷流，而是离子尾，因为密度计的结果显示图像是圆形的。但是，12日观测到的是喷流，因为光的中心与图形的中心有很大的偏离。利用这些将从许多海外观测者那里收集到的数据，我们可以研究喷流是如何与彗星的不规则运动相关联的。