Search results for " stars: individual: Proxima Centauri"

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Flares from small to large: X-ray spectroscopy of Proxima Centauri with XMM-Newton

2003

(Abridged) We report results from a comprehensive study of the nearby M dwarf Proxima Centauri with the XMM-Newton satellite. We find strongly variable coronal X-ray emission, with flares ranging over a factor of 100 in peak flux. The low-level emission is found to be continuously variable. Several weak flares are characteristically preceded by an optical burst, compatible with predictions from standard solar flare models. We propose that the U band bursts are proxies for the elusive stellar non-thermal hard X-ray bursts suggested from solar observations. A very large X-ray flare was observed in its entirety, with a peak luminosity of 3.9E28 erg/s [0.15-10 keV] and a total X-ray energy of 1…

010504 meteorology & atmospheric sciencesOpacityAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesFluxAstrophysicsAstrophysics01 natural scienceslaw.inventionLuminositylaw0103 physical sciencesAstrophysics::Solar and Stellar Astrophysicsstars: activity stars: coronae stars: individual: Proxima Centauri X-rays: starsSpectroscopy010303 astronomy & astrophysicsAstrophysics::Galaxy Astrophysics0105 earth and related environmental sciencesPhysicsSolar flareAstrophysics (astro-ph)Astronomy and AstrophysicsPlasma3. Good healthStars13. Climate actionSpace and Planetary SciencePhysics::Space PhysicsAstrophysics::Earth and Planetary AstrophysicsFlare

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