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  • 1975-1979  (3)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    On the relative magnitude of streaming velocities of alpha particles and protons at 1 AU (1976)
    Springer
    Astrophysics and space science 45 (1976), S. 411-417 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The occurrence at a heliocentric distance of 1 AU of alpha particle streaming velocities larger than proton streaming velocities,v α/v p 〉1 (Ogilvie, 1975) is investigated on the basis of the theory suggesting the existence in the solar wind of an accelerating force acting preferentially on the alpha particles. Accurate solution of the three-fluid model equations for the quiet solar wind indicates that anecessary andsufficient condition for (v α/v p )1 AU〉1 is the presence of a relativelyweak accelerating forceacting in a limited region in the vicinity of 1 AU. If the force is effectiveonly at small heliocentric distances, the alpha particle streaming velocity excess vanishes at distances less than 1 AU, because of the (equalization) action of the dynamical friction force.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00642675
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Further discussion of the electron coronal densities (1976)
    Springer
    Astrophysics and space science 40 (1976), S. 111-113 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00651191
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    On the correlation of coronal green-line intensity and solar wind velocity (1975)
    Springer
    Solar physics 41 (1975), S. 349-366 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00154071
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    Paper (German National Licenses)
    Fulltext
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