The High-Dispersion Continuous Ultraviolet Solar Spectrum and the Balmer-Jump

  • J. Houtgast
Conference paper


Among the intensities, determined at about 200 wavelengths between λ 3000 and λ 4100Å in the spectrum of the centre of the sun’s disk (Houtgast, 1965), the 32 highest ones (windows) were plotted and compared with absolute intensities given by other authors.

The intensities in between the Fraunhofer lines from λ 3600 to λ 4000Å, as determined here for the first time with high dispersion, reveal a detailed picture of several absorption features, one of which can be attributed to a Balmer jump of 0.03, a value in accordance with that found for stars and in agreement with the strengths of the high Balmer lines.

The much higher value of the Balmer jump for the sun, as quoted in literature, in reality refers to the total intensity jump between λ 4000 and λ 3600Å, which is mainly due to the crowding of Fraunhofer lines.


Spectral Type Solar Spectrum Absolute Intensity Fraunhofer Line Reidel Publishing Company 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Barbier, D. and Chalonge, D.: 1939, Ann. Astrophys.2, 254.ADSGoogle Scholar
  2. Canavaggia, R., Chalonge,D., Egger-Moreau, M., Oziol-Peltey, H.: 1946,1950, Ann. Astrophys. 9, 143; 13, 355.Google Scholar
  3. Houtgast, J.: 1965, Proc. Kon. Nederl. Akad. Wetensch. Amsterdam, series B 68, No 5.Google Scholar
  4. Labs, D.: 1957, Z. Astrophys.44, 37.ADSGoogle Scholar
  5. Labs, D. and Neckel, H.: 1962, Z. Astrophys.55, 269.ADSGoogle Scholar
  6. Makarova, E.A.: 1957, Astr. Zhu. 34, 539; Soviet Astr. 1, 531.ADSGoogle Scholar
  7. Makarova, E.A.: 1963, Observatory83, 183. (Also in 1964, Astr. Zhu. 41, 288; Soviet Astr. 8, 222.)ADSGoogle Scholar
  8. Makarova, E. A.: 1965, Astr. Zhu. 42, 681; Soviet Astr. 9, 525.ADSGoogle Scholar
  9. Michard, R.: 1950, Bull. Astr. Inst. Neth.11, 227.ADSGoogle Scholar
  10. Mulders, G.F.W.: 1939, Publ. Astr. Soc. Pacific51, 220.ADSCrossRefGoogle Scholar
  11. Murasheva, M.S. and Sitnik, G.F.: 1963, Astr. Zhu. 40, 819. (Also in 1964, Soviet Astr. 7, 623.)ADSGoogle Scholar
  12. Pettit, E.: 1940, Astrophys. J.91, 159.ADSCrossRefGoogle Scholar
  13. Unsöld, A.: 1955, Physik der Sternatmosphären. Springer-Verlag, Berlin, p. 481.zbMATHGoogle Scholar
  14. Utrecht Photometric Atlas of the Solar Spectrum: 1940, Amsterdam.Google Scholar
  15. Utrecht Preliminary Photometric Catalogue of Fraunhofer Lines, 1960; Rech. Astr. Obs. Utrecht, XV. (Also in Moore, Ch.E., Minnaert, M.G.J., Houtgast, J.: 1966, The Solar Spectrum 2935Å to 8770Å, Second Revision of Rowland’s Preliminary Table of Solar Spectrum Wavelengths, National Bureau of Standards Monograph 61, Washington, D.C.)Google Scholar

Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1968

Authors and Affiliations

  • J. Houtgast
    • 1
  1. 1.Utrecht University Observatory ‘Sonnenborgh’Netherlands

Personalised recommendations