Nonthermal velocities in different temperature regions of the solar lower transition region

被引:15
作者
Akiyama, S [1 ]
Doschek, GA [1 ]
Mariska, JT [1 ]
机构
[1] USN, Res Lab, EO Hulburt Ctr Space Res, Washington, DC 20375 USA
关键词
Sun : transition region; Sun : UV radiation; turbulence;
D O I
10.1086/428638
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We analyze the relationship between nonthermal velocities derived from spectral lines of ions formed at different temperatures in the solar lower transition region, using spectra from the Solar Ultraviolet Measurements of Emitted Radiation ( SUMER) spectrometer on board the Solar and Heliospheric Observatory (SOHO). We find a high degree of correlation among nonthermal motions arising at temperatures ranging from 3 x 10(4) to 2.5 x 10(5) Kover 1 '' spatial scales in quiet-Sun regions. We discuss the implications of these results in terms of the physical nature of the transition region.
引用
收藏
页码:540 / 550
页数:11
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