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  • 1975-1979  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Astrophysics and space science 53 (1978), S. 403-409 
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The observations of the Zel'dovich effect in galaxy clusters are reviewed. The failure to detect the effect at short wavelengths is interpreted as proof of the existence of intergalactic dust. Small and fast spinning grains can emit the power needed to compensate the decrease in temperature expected from the Zel'dovich effect.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Astrophysics and space science 51 (1977), S. 111-116 
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The temperature of graphite grains in the interstellar medium has been computed with different assumptions on the extrapolation of its optical constants into infrared. It is found that values computed up to now are generally underestimated by 10–20% in normal interstellar conditions. For extreme conditions (very dark clouds) errors by a factor of two are possible and more attention has to be paid in dealing with problems related to molecule formation.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Astrophysics and space science 54 (1978), S. 417-423 
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Depletion of heavy elements has been recognized to be important in the understanding of the chemical composition of the interstellar medium. This problem is also relevant to the study of Hii regions. In this paper we investigate the gaseous depletion in the physical conditions of the Orion nebula. We reach the conclusion that very probably no depletion of heavy elements, due to sticking on dust grains, took place during the lifetime of the Orion nebula.
    Type of Medium: Electronic Resource
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