Abstract
THE EFFECTIVE WAVE-LENGTH OF THE LIGHT OF GALACTIC STARS.—Prof. O. Bergstrand contributes a paper on this subject to the centenary number of Astron. Nach. The research is based on a series of plates of the star-cloud in Cygnus obtained with a 15-cm. triple objective prism. The spectral types of the brighter stars were taken from the Henry Draper catalogue, and the following table shows the correlation between type and effective wave-length λ.
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Our Astronomical Column. Nature 108, 480 (1921). https://doi.org/10.1038/108480b0
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DOI: https://doi.org/10.1038/108480b0