INVESTIGADORES
DIAZ Rodrigo Fernando
congresos y reuniones científicas
Título:
Chromospheric activity in K stars
Autor/es:
M. VIEYTES; P. MAUAS; C. CINCUNEGUI; R. DÍAZ
Lugar:
Capilla del Monte, Córdoba, Argentina
Reunión:
Congreso; 49a Reunión Anual de la Asociación Argentina de Astronomía; 2006
Institución organizadora:
Observatorio de Córdoba
Resumen:
We computed chromospheric models for six stars of spectral type K, in
most cases in two different moments of activity. The stars were chosen
with 0.82<B-V<0.90, including the widely studied star Epsilon
Eridani. The stars in the sample have a wide variety of magnetic
activity levels, which allows us to study the differences in structures
induced by stellar activity, and expand our previous work for G stars
including the Sun as a star. The models were constructed to obtain the
best possible match with the Ca II K and H-beta observed profiles. We
also computed the net radiative losses for each model to constrain the
heating mechanism to maintain the structure in the atmosphere predicted
by the models. We find a strong correlation between these losses and
SCaII, the index generally used as a proxy for activity, as we found for
G stars.