On the correlation of coronal green-line intensity and solar wind velocity

E. C. Roelof*, S. Cuperman, A. Sternlieb

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Cross-correlation functions have been computed between green-line intensity (Kislovodsk) and Vela solar wind velocity January-June 1967. They are calculated separately for east and west limb observations in 5° latitude increments, and the solar wind velocites are correlated at their estimated emission times by correcting for the plasma Earth-Sun transit time using the observed velocities. The cross-correlation patterns appear to be dominated by two competing effects: a tendency of quasi-stationary green-line emission and solar wind velocity to anti-correlate; and a tendency of transient green-line emission and solar wind velocity enhancements to correlate positively. We also find evidence for simultaneous (same-day) emission brightenings over 2 to 4 limb quadrants. It is therefore recommended that, following a well-known practice in solar terrestrial studies, recurrent and transient events in both solar wind and green-line emissions should be studied separately.

Original languageEnglish
Pages (from-to)349-366
Number of pages18
JournalSolar Physics
Volume41
Issue number2
DOIs
StatePublished - Apr 1975

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