Search results for " stars: individual: CC Eri"

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X-ray flares on the UV Ceti-type star CC Eridani: a "peculiar" time-evolution of spectral parameters

2007

Context: Weak flares are supposed to be an important heating agent of the outer layers of stellar atmospheres. However, due to instrumental limitations, only large X-ray flares have been studied in detail until now. Aims: We used an XMM-Newton observation of the very active BY-Dra type binary star CC Eri in order to investigate the properties of two flares that are weaker than those typically studied in the literature. Methods: We performed time-resolved spectroscopy of the data taken with the EPIC-PN CCD camera. A multi-temperature model was used to fit the spectra. We inferred the size of the flaring loops using the density-temperature diagram. The loop scaling laws were applied for deriv…

PhysicsSolar flareAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)Stellar atmosphereFOS: Physical sciencesAstronomy and AstrophysicsContext (language use)Coronal loopAstrophysicsLight curveAstrophysicsX-rays: stars stars: coronae stars: activity stars: flare stars: late-type stars: individual: CC Erilaw.inventionStarsSettore FIS/05 - Astronomia E AstrofisicaSpace and Planetary SciencelawBinary starPhysics::Space PhysicsAstrophysics::Solar and Stellar AstrophysicsFlare

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