IAFE 05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
A statistical analysis of H alpha-Ca II relation for solar-type stars of different activity levels
Autor/es:
BUCCINO, A. P.; VIEYTES, M. C.; MAUAS, P. J. D.
Lugar:
Mendoza
Reunión:
Simposio; IAU Symposium 286: Comparative Magnetic Minima: characterizing quiet times in the Sun and stars; 2011
Resumen:
Based on our large spectral database obtained at CASLEO Argentinian Observatory, we analyzed the relation between simultaneous measurements of H and Ca II H+K fluxes. Although the correlation between both proxies is positive for the solar case, in 2007 our group found that while some stars exhibit correlations between H and the Ca II lines, the slopes change from star to star, including cases where no correlation was found. To discern if this flux-flux relation depends on the level of activity of the star and if it is associated with the distribution of active regions in the stellar atmosphere, in this work we analyze the relation between H -Ca II fluxes for the whole set of 44 G dwarf stars and individually for a subset of several solar-type stars of different level of activity.
