Resumen
Observations of multicolor polarimetry of the stars in the region of the open cluster Trumpler 27 have been obtained at CASLEO, San Juan, Argentina. These data show rather high values of polarization but with a considerable scatter (P ≡4% to 9.5%). On the other hand, the angle of the polarimetric vectors appears to be constant in the sample. A new numerical algorithm is used to study the different components of the observed polarization vectors. The authors estimate the foreground polarization vector of the cluster from observations of a few foreground, non-member stars seen in the region. The data suggest that a patchy dust structure is present across the cluster surface.
