INVESTIGADORES
MAUAS Pablo Jacobo David
congresos y reuniones científicas
Título:
A possible activity cycle in Proxima Centauri
Autor/es:
CINCUNEGUI, C. C.; DÍAZ, R. F.; MAUAS, P.J.D.
Lugar:
Córdoba
Reunión:
Congreso; Boletín de la Asociación Argentina de Astronomía, vol.49, p.140-143; 2006
Institución organizadora:
Asociación Argentina de Astronomía
Resumen:
Several late-type stars (stars with a radiative core and an outer convective layer) present activity cycles resembling the Solar one. This work aims at studying whether an activity cycle can be detected in the dM5.5e star Proxima Centauri, which is supposed to be completely convective. We present periodical medium-resolution echelle observations covering the complete visual range, which were taken at the CASLEO Argentinean Observatory. These observations are distributed along 7 years. We analize the activity levels to look for a period of activity. We find strong evidence of a cyclic activity, with a period of 442 days. We also estimated that the Ca II S index varies around 130% due to activity variations outside of flares.
