The aim of this work is to study both light curve and orbital phase spectroscopy of Cen X-3 taking advantage of the MAXI/GSC observation strategy. These studies allow delimiting the stellar wind properties and its interactions with the compact object. From the analysis of the light curve, we have estimated the orbital period of the binary system and also found possible QPOs around a superorbital period of Psuperorb = 220 ± 5 days. Both orbital phase-averaged and phaseresolved spectra were extracted and analysed in the 2.0–20.0 keV energy range. Two models have described spectra satisfactorily, a partial absorbed Comptonization of cool photons on hot electrons plus a power law, and a partial absorbed blackbody plus a power law, both modified by adding Gaussian lines. The high value of the X-ray luminosity in the averaged spectrum indicates that the accretion mode is not only due to the stellar wind.
X-3 a lo largo de su órbita. Estos estudios permiten delimitar las propiedades del viento estelar y sus interacciones con el objeto compacto. Un análisis temporal de las curvas de luz en distintas bandas energéticas ha sido realizado. Por medio de este análisis hemos estimado el periodo orbital del sistema y hemos encontrado posibles QPOs alrededor de un superperiodo orbital de P superorb = 220 ± 5 días. Hemos extraído y analizado los espectros medio y en fase orbital en el rango 2.0-20.0 keV por medio de dos modelos: una comptomización parcialmente absorbida de fotones fríos en electrones calientes más una ley de potencias y un cuerpo negro parcialmente absorbido más una ley de potencias, ambos modificados por líneas gaussianas. Hemos definido y comparado los espectros de los estados altos y bajos con el espectro medio. Hemos determinado el radio de la region de emisión y el alto valor de la luminosidad del espectro medio indica un modo de acreción no debido solamente al viento estelar.
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