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


Physical processes determining the chromospheric temperature distribution
Authors:Stuart D Jordan
Institution:(1) Laboratory for Solar Physics and Astrophysics, NASA-Goddard Space Flight Center, 20771 Greenbelt, Md., USA
Abstract:Calculations performed with several models of the solar chromosphere support Ulmschneider's conclusion that relatively short period acoustic waves heat the low chromosphere in the region just above the temperature minimum. However, these same short period waves (10les period Ples80 s) are not able to maintain chromospheric temperatures at heights where tau5000Å(normal) < 10-6. The calculations also show that an earlier conjecture stating that the H2 population might influence the non-LTE chromospheric H- population is probably not correct, due to lower values of the ratio n e/n H inferred from more recent observations. Finally, the calculations support Athay's contention that the Cayrel mechanism alone cannot produce the observed temperature rise, because the magnitude of the radiative cooling in the lines is too great.
Keywords:
本文献已被 SpringerLink 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