首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Solar flare activity: Evidence for large-scale changes in the past
Authors:Herbert A Zook  Jack B Hartung  Dieter Storzer
Institution:NASA-Johnson Space Center, Houston, Texas 77058, USA;State University of New York at Stony Brook, Stony Brook New York 11794, USA;Department of Mineralogy, Museum National d''Histoire Naturelle, 61 Rue de Buffon, Paris, France
Abstract:An analysis of radar and photographic meteor data and of spacecraft meteoroid penetration data indicates that there probably has not been a large increase in meteoroid impact rates in the last 104 yr. The solar flare tracks observed in the glass linings of meteoroid impact pits on lunar rock 15205 are therefore reanalyzed assuming a meteoroid flux that is constant in time. Based on this assumption, the data suggest that the production rate of Fe-group solar flare tracks may have varied by as much as a factor of 50 on a time scale of about 104 yr. No independently obtained data are known to require conflict with this interpretation. Confidence in this conclusion is somewhat qualified by the experimental and analytical uncertainties involved, but the conclusion nevertheless remains the present “best” explanation for the observed data trends.
Keywords:
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号