Fast transient X-rays from flare stars and RS CVn binaries

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Emission Spectra, Flare Stars, Stellar Flares, X Ray Binaries, X Ray Spectra, Solar Atmosphere, Stellar Activity, Stellar Atmospheres

Scientific paper

The authors have studied the fast transient X-ray (FTX) observations of the Ariel V satellite. They find that the FTX have characteristics very similar to the stellar flares detected in flare stars and RS CVn binaries by other satellites. It is found that, of the possible candidate objects, only the flare stars and RS CVn binaries can be associated with the Ariel V observations. 11 new flare stars and RS CVn binaries are associated with the FTX. This brings the total number of identifications with the flare stars and RS CVn binaries to 17. The authors further study the flare properties and correlate the peak X-ray luminosity of these Ariel V sources with the bolometric luminosity of the candidate stars. They discuss a solar flare model and show that the observed correlation can be explained under the assumption of constant temperature loops of binary sizes.

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