Hale-Bopp彗星喷流速度的测定  

Determination of the Ejection Velocities of Comet Hale-Bopp's Jets

作　　者：赵君亮[1] 钱伯辰[1] 陶隽[1] 顾敏峰[1] 汤源[1] 

机构地区：[1]中国科学院上海天文台,上海200030

出　　处：《中国科学院上海天文台年刊》2000年第S1期104-109,共6页Annals Shanghai Astronomical Observatory Chinese Academy of Sciences

基　　金：国家自然科学基金资助项目 (批准号 :196 5 30 0 1) ;中国科学院光学天文联合开放研究实验室的资助

摘　　要：应用一种处理彗星CCD图像的方法 ,即小波分析方法 ,它可以较理想地把喷流从彗发中分离出来。使用这种方法对 1.5 6m望远镜观测到的Hale -Bopp彗星CCD图像进行处理 ,得到它们的喷流图像 ,再比较不同日期喷流亮度中心到彗核的距离可以测定喷流的速度。如果Hale -Bopp彗星的自转周期为 12h左右 ,根据 2 7次测定得到喷流的平均速度为 (5 99± 34)m/s。发现各条喷流的喷发速度不一样 ,而且有较大的日变化 ,变化幅度在 (2 0 0～ 90 0 )m/s之间。In this paper, Wavelet analysis method is brought into use to process the CCD images of Comet Hale-Bopp, which are obtained by the 1.56 m telescope of Shanghai Observatory. This method depresses the coma and enhances the features of jets. So it's possible for us to measure the velocities of jets by comparing the distance between comet nucleus and brightness center of jets in different days. As the rotation period of Comet Hale-Bopp is about 12 hours, the average velocity of jets was determined at (599±34)m/s according to 27 measurements. And we found that the velocity is different for each jet and different days, varied from 200m/s to 900m/s.

关 键 词：HALE-BOPP彗星 喷流 膨胀速度 

分 类 号：P185.81[天文地球—天文学]