Photospheric and chromospheric activity in four young solar-type stars

Antonio Frasca (1); Ettore Marilli (1) ((1) INAF - Catania Astrophysical Observatory (2) Center of Excellence in Information Systems; Gregory W. Henry (2); Katia Biazzo (1); Santo Catalano (1); Tennessee State University)

arxiv: astro-ph/0609525 · v1 · submitted 2006-09-19 · 🌌 astro-ph

Photospheric and chromospheric activity in four young solar-type stars

Katia Biazzo (1) , Antonio Frasca (1) , Gregory W. Henry (2) , Santo Catalano (1) , Ettore Marilli (1) ((1) INAF - Catania Astrophysical Observatory (2) Center of Excellence in Information Systems , Tennessee State University) This is my paper

classification 🌌 astro-ph

keywords chromosphericphotosphericchi1epsilonfindfourkappa1plage

0 comments

read the original 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.

This paper has not been read by Pith yet.

Photospheric and chromospheric activity in four young solar-type stars

discussion (0)