Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...276...69c&link_type=abstract
Astronomy and Astrophysics, Vol.276, NO. 1/SEPI, P. 69, 1993
Astronomy and Astrophysics
Astrophysics
5
Stellar Atmospheres, Ca Ii H & K Lines, Stars: Late Type, Stars: Activity Of, Stars: Chromospheres Of, Stars: Α Cen B
Scientific paper
High resolution profiles of chromospheric lines may give very valuable information about the inhomogeneous structure and flows within the atmosphere of late type and quiescent dwarfs. Here we present a method for empirical modelling of the variability of Ca II H spectra, validating some assumptions by observations of α Cen B. We developed a multicomponent description and simulation code for the spectroscopic modulation of fluxes, velocities, asymmetries and profiles associated with large scale chromospheric regions on the cool stars. We present the results and the analysis of this technique that can be applied for estimating rotational period, or the coverage of chromospheric active structures in solar-like stars.
Char S.
Foing Bernard H.
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