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12. Spectrographic observations of AI velorum
Published online by Cambridge University Press: 02 August 2017
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AI Velorum was discovered by E. Hertzsprung(1) in 1931 on plates taken at Johannes-burg; he found it to be an RR Lyrae variable with a period of od·1116, but later on F. Zagar(z) and A. van Hoof (3) showed that the light curve is very irregular. [G. Herbig(4) found that more or less the same kind of irregularities are present in the radial-velocity curve as well.
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