Photospheric and chromospheric activity in four young solar-type stars

Abstract

We present a photometric and spectroscopic study of four G-K dwarfs, namely HD 166, epsilon Eri, chi1 Ori and kappa1 Cet. In three cases, we find a clear spatial association between photospheric and chromospheric active regions. For chi1 Ori we do not find appreciable variations of photospheric temperature, and chromospheric Halpha emission. We applied a spot/plage model to the observed rotational modulation of temperature and flux to derive spot/plage parameters and to reconstruct a rough three-dimensional map of the outer atmosphere of kappa1 Cet, HD 166 and epsilon Eri.

arXiv comment12 pages, 3 tables, 9 figures. Submitted to ApJ

References in corpus (6)

• The NextGen Model Atmosphere grid for $3000\le \Teff \le 10000\K$
• Late-type stars members of young stellar kinematic groups - I. Single stars
• Evidence for a Long-period Planet Orbiting Epsilon Eridani
• Differential rotation of the active G5V star Kappa1 Ceti: Photometry from the MOST satellite
• Stellar Atmospheres of Nearby Young Solar Analogs
• Direct Detection of the Companion of Chi 1 Orionis

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