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Momentum flux invariance and solar wind sources

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Abstract

New solar wind data from Helios-2 are used to study, in a statistical fashion, the relation between proton number density n, flow speed u and heliocentric distance r. It is shown that the average of nu 2 r 2 does not depend on flow speed nor on distance, verifying the previously established invariance of momentum flux density (mnu2) carried by the solar wind. Averages of mnu2 from different spacecraft do not show correlation with the solar cycle. Rather, the close agreement (to within 1.8%) of values from Helios-1 and Helios-2 suggests that the momentum flux density carried by the solar wind may be also constant during the solar cycle.

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Author notes

  1. Raphael Steinitz

    Present address: Physics Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel

Authors and Affiliations

  1. Department of Physics, University of Ulm, F.R.G.

    Raphael Steinitz

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  1. Raphael Steinitz
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Paper delivered at the IX-th Lindau Workshop ‘The Source Region of the Solar Wind’.

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Steinitz, R. Momentum flux invariance and solar wind sources. Sol Phys 83, 379–384 (1983). https://doi.org/10.1007/BF00148287

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  • DOI: https://doi.org/10.1007/BF00148287

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