Ground Based Limb Survey of the Sun Polar Regions in the H alpha Line

Evolutions of the cool component of the inner solar corona have animportant part in the equilibria and energy transport processes in thesun atmosphere. Since 1994, a numerical daily survey of the entirelimb in the Hydrogen H alpha line is performed with the HACOcoronagraph at Pic-du-Midi observatory...

Full description

Saved in:
Bibliographic Details
Published in:Astrophysics and space science 2000-09, Vol.273 (1-4), p.17-23
Main Authors: Noens, J-C, Wurmser, O
Format: Article
Language:English
Subjects:
Asymmetry
C (programming language)
Ejection
Evolution
Grounds
Limbs
Polar regions
Solar corona
Sun
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Evolutions of the cool component of the inner solar corona have animportant part in the equilibria and energy transport processes in thesun atmosphere. Since 1994, a numerical daily survey of the entirelimb in the Hydrogen H alpha line is performed with the HACOcoronagraph at Pic-du-Midi observatory. This experiment is includedin the general ground based support programs for the SOHO mission.Real and differed time data are available within the solar data baseBASS2000. A statistical study using the data set obtained during thefirst four years of this program shows some important properties ofthe distribution of the polar ejection and surge events. An asymmetrybetween North and South polar regions is well established. Its signreverseal near the time of the apparition of the new solar magneticactivity cycle is discussed.
ISSN:0004-640X
1572-946X
DOI:10.1023/A:1002687606153