Abstract
IN reply to Dr. Brester I have to remark, in the first place, that I made no attempt to give all the details of the theory, limitations of space not permitting. One of my principal arguments against the theory was that, if it were true, all cool stars should be variable, and I still see no reason to alter my views. The observations of the red stars by Dunér show that the spectra of some of the stars which are not variable are identical with some of those which are. For example, the spectra of 120 Schj., and D.M. + 47° 2291, which are not variable, are exactly like those of χ Cygni and R Leonis. The compositions and temperatures of the gaseous surroundings of these bodies are therefore similar, and there is no reason, from Dr. Brester's point of view, why one should be variable more than another, since, if they are cooling, they all start cooling under exactly equal conditions. (It may fairly be assumed that the spectra of the variables have been generally taken at maximum.) The cooling to dew-point is therefore not in question in the variable any more than in the apparently invariable stars.
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FOWLER, A. Variable Stars and the Constitution of the Sun. Nature 39, 606 (1889). https://doi.org/10.1038/039606c0
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DOI: https://doi.org/10.1038/039606c0
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