Chemical Evolution of the Small Magellanic Cloud: The Planetary Nebulae

Abstract

Abstract. In this work, the chemical history of the SMC is described through an observed sample of planetary nebulae (PNe). Age-abundance relations were derived through the [o-elements/H] (oxygen, argon, neon and sulphur) ratios estimated from PNe of different progenitor masses. In particular, oxygen abundances seem do not decrease due to O-N cycle operation. (This work was supported by FAPESP)