Spectroscopic studies of southern-hemisphere Cepheids: XX Sgr, AP Sgr, RV Sco, RY Sco, V482 Sco, and V636 Sco

We present the results obtained by analyzing 20 spectra of six bright Cepheids taken with the 1.9-m telescope at the South African Astronomical Observatory. The chemical composition and atmospheric parameters have been determined for XX Sgr, AP Sgr, RV Sco, RY Sco, V482 Sco, and V636 Sco.