INVESTIGADORES
MAUAS Pablo Jacobo David
congresos y reuniones científicas
Título:
The interesting binary system GJ375
Autor/es:
DÍAZ, R. F.; GONZÁLEZ, J.F.; CINCUNEGUI, C. C.; MAUAS, P.J.D.
Lugar:
Córdoba
Reunión:
Congreso; Boletín de la Asociación Argentina de Astronomía, vol.49, p.112-115; 2006
Institución organizadora:
Asociación Argentina de Astronomía
Resumen:
We study the spectroscopic binary system GJ375 using medium resolution echelle spectra obtained at the Jorge Sahade telescope at CASLEO. Using the method described by González & Levato (2006, A&A 448,283) we separate the composite spectra and confirm the spectral types of both components are similar (dMe3.5). Precise masurements of the orbital period (P = 1.87844 days) and minimum masses (M1 sin^3(i) 0.33 Msol and M2 sin^3(i) =0.35 Msol) are obtained. Using photometric data from the ASAS database (Pojmanski,G. 2002, AcA 52 397) we find variations of around 0.04 mag, the amplitude of which changes periodically with time, showing a period of around 700 days. We interpret this as signs of cyclic stellar activity in the system, with both components in phase.