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  • Shock Waves  (1)
  • solar wind  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Composition Variations in the Solar Corona and Solar Wind (1999)
    Springer
    Space science reviews 87 (1999), S. 55-66 
    Details
    ISSN: 1572-9672
    Keywords: corona ; solar wind ; composition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Order of magnitude variations in relative elemental abundances are observed in the solar corona and solar wind. The instruments aboard SOHO make it possible to explore these variations in detail to determine whether they arise near the solar surface or higher in the corona. A substantial enhancement of low First Ionization Potential (FIP) elements relative to high FIP elements is often seen in both the corona and the solar wind, and that must arise in the chromosphere. Several theoretical models have been put forward to account for the FIP effect, but as yet even the basic physical mechanism responsible remains an open question. Evidence for gravitational settling is also found at larger heights in quiescent streamers. The question is why the heavier elements don't settle out completely.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005157914229
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Diagnostics of supernova remnant shock waves (1995)
    Springer
    Astrophysics and space science 233 (1995), S. 231-237 
    Details
    ISSN: 1572-946X
    Keywords: Shock Waves ; Supernova Remnants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Fairly simple models can explain the emission from non-radiative shock waves in supernova remnants. This talk reviews some of the more robust diagnostics of shock parameters and some of the implications for the physics of collisionless shock waves in interstellar gas. The Hopkins Ultraviolet Telescope observed several non-radiative shocks during the ASTRO-2 mission, and the spectra have interesting implications for the physics of collisionless shocks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00627354
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    Paper (German National Licenses)
    Fulltext
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