A DOPPLER DIMMING DETERMINATION OF CORONAL OUTFLOW VELOCITY

被引：58

作者：

STRACHAN, L ^{[1
]}

KOHL, JL ^{[1
]}

WEISER, H ^{[1
]}

WITHBROE, GL ^{[1
]}

MUNRO, RH ^{[1
]}

机构：

[1] BALL AEROSP SYST GRP,BOULDER,CO 80306

来源：

ASTROPHYSICAL JOURNAL | 1993年 / 412卷 / 01期

关键词：

SOLAR WIND; SUN; CORONA; PARTICLE EMISSION; UV RADIATION;

D O I：

10.1086/172930

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Outflow velocities in a polar coronal hole are derived from observations made during a 1982 sounding rocket flight. The velocity results are derived from a Doppler dimming analysis of resonantly scattered H I Lyalpha. This analysis indicates radial outflow velocities of 217 km s-1 at 2 R. from Sun-center with an uncertainty range of 153 to 251 km s-1 at a confidence level of 67%. These results are best characterized as strong evidence for supersonic outflow within 2 R. of Sun-center in a polar coronal hole. Several means for obtaining improved accuracy in future observations are discussed.

引用

页码：410 / 420

页数：11

共 25 条

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