MULTIPLE DOWNFLOW VELOCITIES ABOVE SUNSPOTS

被引：15

作者：

BREKKE, P ^{[1
]}

KJELDSETHMOE, O ^{[1
]}

BRUECKNER, GE ^{[1
]}

机构：

[1] USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375

来源：

ASTROPHYSICS AND SPACE SCIENCE | 1990年 / 170卷 / 1-2期

关键词：

D O I：

10.1007/BF00652659

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Supersonic transition zone downflow appears to be commonly occurring above sunspots. The downflow has been observed in 29 emission lines in the ultra-violet spectrum with the High Resolution Telescope and Spectrograph (HRTS) on two rocket flights and on 5 consecutive days during the Spacelab-2 mission. Spectra from the second rocket flight, contain the most extreme example of downflow, showing speeds up to 180 km s-1 and extending over 60 are sec along the slit. The observations demonstrate the existence of several different distinctive flow speeds within the 1 arc sec resolution element throughout the temperature range 7000-240 000 K. © 1990 Kluwer Academic Publishers.

引用

页码：135 / 140

页数：6

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