Polarimetric observations of southern hemisphere young solar-type stars

A report is given on some linear and circular polarimetric observations of young solar-type stars. Despite a somewhat high level of instrumental polarization, the measurements were able to detect polarizations ∼ 0.0001 or 0.01%. Temporal variability has been discovered for 59 Vir with an indication that circular polarization is also present. A polarization at a level of p ∼ 1% was found associated with the star SAO 251015. Marginal polarizations are also suspected for the stars HD 155555 and HD 1835. For SAO 154972 (TU Pyx), a sudden change in polarization ∼ 2% occurred over some tens of minutes and an associated circular polarization was also detected.