Abstract
MIRA CETI.-There have been three interesting discoveries made concerning this famous variable in recent months. The finding of the faint companion, that is responsible for the bright lines seen in the spectrum at minimum, has already been reported in this column. The next step was the investigation of its heat radiation by the thermocouple by Messrs. Nicholson and Pettit at Mt. Wilson; this was described by Prof. Eddington at the February meeting of the Royal Astronomical Society (see Observatory for March, p. 58). While the visual magnitude varies from the third to the ninth, a 200-fold range, the “heat magnitude” varies only from 1.5 mag. to 3 mag., a 4-fold range. This shows that the loss of light is almost wholly in the short wave-lengths.
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Our Astronomical Column. Nature 115, 436 (1925). https://doi.org/10.1038/115436a0
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DOI: https://doi.org/10.1038/115436a0