Outflow velocity of interplume regions at the base of Polar Coronal Holes

被引：0

作者：

Patsourakos, S ^{[1
]}

Vial, JC ^{[1
]}

机构：

[1] Univ Paris 11, CNRS, Inst Astrophys Spatiale, F-91405 Orsay, France

来源：

ASTRONOMY & ASTROPHYSICS | 2000年 / 359卷 / 02期

关键词：

sun : corona; sun : solar wind; sun : UV radiation;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on SUMER/SOHO observations at 1.05 Ro of a well identified interplume region in a South Pole Coronal Hole. Combination of Doppler shifts and Doppler dimming measurements allowed to determine, for the first time, the total wind outflow velocity (approximate to 67 km s(-1)) at this height. Our calculations of the outflow velocity benefit from co-spatial and almost co-temporal observations. This large outflow velocity is a strong argument in favour of the interplumes being the main soul-ce of the fast solar wind. We find that the mass flux density through the observed interplume is 4.8 10(-10) g cm(-2)s(-1) which yields 10(-15) g cm(-2)s(-1) at 1 AU with an expansion factor of 11.

引用

页码：L1 / L4

页数：4

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