Abstract
KNOWN UV Ceti flare stars are all located within 20 pc of the Sun, and their distribution seems to be isotropic. They are cool, low-luminosity objects with masses less than 0.5 M⊙. Both optical1 and radio2 radiations have been observed during flare events. X rays have also been predicted3,4, but no positive observations have yet been reported. We present here new estimates of X-ray emission, based on the ratio between X-ray and radio flux from solar bursts. It is anticipated that the intensities of the X-ray flares will be more than 10 photons cm−2s−1; within the range of sensitivities of present satellite detectors (approximately 0.5–0.01 photon cm−2 s−1 for a flare duration of 3 min in the energy range 1–10 keV).
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JO CRANNELL, C., MCCLINTOCK, J. & MOFFETT, T. X rays predicted from flares of UV Ceti stars. Nature 252, 659–661 (1974). https://doi.org/10.1038/252659a0
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DOI: https://doi.org/10.1038/252659a0
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