Photospheric and chromospheric activity in four young solar-type stars

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dc.creatorBiazzo, Katia
dc.creatorFrasca, Antonio
dc.creatorHenry, Gregory W.
dc.creatorCatalano, Santo
dc.creatorMarilli, Ettore
dc.date2006-09-19
dc.date.accessioned2026-07-07T10:40:12Z
dc.date.available2026-07-07T10:40:12Z
dc.descriptionWe 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.
dc.description12 pages, 3 tables, 9 figures. Submitted to ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0609525
dc.identifierhttp://arxiv.org/abs/astro-ph/0609525
dc.identifierAstrophys.J.656:474-482,2007
dc.identifierdoi:10.1086/510279
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/181269
dc.subjectAstrophysics
dc.titlePhotospheric and chromospheric activity in four young solar-type stars
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