INVESTIGADORES
DIAZ Rodrigo Fernando
congresos y reuniones científicas
Título:
The interesting binary system GJ375
Autor/es:
R. F. DÍAZ; J. F. GONZÁLEZ; C. CINCUNEGUI; P. J. D. MAUAS
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 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.
