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  • 1970-1974  (2)
  • 1971  (2)
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  • 1970-1974  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    λ 4097.3 Niii emission in the chromospheric spectrum? (1971)
    Springer
    Solar physics 16 (1971), S. 336-339 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The recent tentative identification of a chromospheric emission line at λ⊙ = 4097.342 Å with the Niii transition 3s 2 S 1/2 $#x2212; 3p 2 P∘ 3/2 is discussed. It is shown that the observed intensity is inconsistent with the observed flux in the XUV resonance lines and considerably greater than the predicted intensity from the chromosphere-corona transition zone. Microphotometry of a plate shows that the ‘line’ is a short interval of continuum between absorption lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00162475
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    On the abundance of chlorine in the Sun (1971)
    Springer
    Solar physics 19 (1971), S. 289-296 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A low-noise photoelectric scan which includes the predicted position of the Cli transition 4s 4 P 5/2-4 p 4 D 0 7/2 provides inconclusive evidence for the presence of the line in the solar photospheric spectrum. An upper limit logN(Cl) ⩽ 5.5 is derived. It is pointed out that the fundamental vibration rotation band of HC1 at 3.3 μ should be detectable in the sunspot spectrum unless logN(Cl) 〈 4.6. Sunspot spectra may also provide the isotopic abundance ratio N(Cl35)/N(Cl37). A new derivation of the chlorine abundance for the Orion nebula is presented: logN(Cl) ≈ 5.8. It is suggested that a cosmic abundance logN(Cl) = 5.5 to 5.8 be adopted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00146057
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    Paper (German National Licenses)
    Fulltext
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