Observational and Theoretical study of the inner region of HH 30

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HH 30 is a T Tauri star. In this thesis photometric and polarimetric observations through the source are reported. The observations were carried out using the 84cm telescope of the National Observatory of Mexico (OAN-SPM). This thesis also present a model of the brightness of the source using a Monte Carlo code of Watson and Henney (2001) that solves the radiative transfer equation. I modified this code in order to include the polarization. I used the parameters of Wood y Whitney (1998) to calculate the polarimetric variability observed in HH 30.