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  • 1975-1979  (3)
  • 1965-1969  (1)
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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
    Ion cyclotron resonant instability of RH waves propagating at an angle to the interplanetary magnetic field (1969)
    Springer
    Astrophysics and space science 5 (1969), S. 333-341 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The anomalous Doppler-shift interaction between positive ions and right-hand (RH) polarized E.M. waves propagating at a small angle to a static magnetic field is investigated. The linear rate of growth of the resulting instability is obtained and compared with the growth rate for the parallel propagation case. For conditions typical of the solar wind at about 1 AU, the rate of growth always decreases with increasing propagation angle. For very large ion pressures (β‖≫1) and temperature anisotropies (T ‖ T ⊥≫1), the rate of growth may increase with increasing propagation angle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650000
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    Paper (German National Licenses)
    Fulltext
  • 3
    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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  • 4
    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)
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