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

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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.

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Authors and Affiliations

  1. Applied Physics Laboratory, The Johns Hopkins University, Silver Spring, Md., U.S.A.

    E. C. Roelof & A. Sternlieb

  2. Dept. of Physics and Astronomy, Tel Aviv University, Ramat-Aviv, Israel

    S. Cuperman

Authors
  1. E. C. Roelof
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  2. S. Cuperman
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  3. A. Sternlieb
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Roelof, E.C., Cuperman, S. & Sternlieb, A. On the correlation of coronal green-line intensity and solar wind velocity. Sol Phys 41, 349–366 (1975). https://doi.org/10.1007/BF00154071

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  • DOI: https://doi.org/10.1007/BF00154071

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