a Study of Flare Stars

Mathematics – Probability

Scientific paper

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Scientific paper

Flare stars, as a relatively new class of variable stars, have been the object of a joint radio-optical observation program. Correlation of the radio and optical data has been carried out by the method of the superposition of epochs. Originally, this was done because only very small flares had been observed and it was necessary to separate the events from the noise level. Since larger flares have been observed, this method has provided the most convenient way to attach significance to various features of the light- and radio-energy curves. Results of the first six observing periods yielded a probability of 1 in 108 that the correlation of radio and optical flares was spurious. Energy calculations for a flare observed by the Australia Baker-Nunn camera showed that both radio and optical energies of a stellar flare are several orders of magnitude larger than emission from the largest solar flares. From the Jodrell Bank observations, at least two types of stellar flares with different temporal and energy characteristics have also been identified. A detailed description of the optical observing and reduction methods is included, along with a review of the characteristics of flare stars.

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