The mixed chemistry phenomenon in Galactic Bulge PNe
The mixed chemistry phenomenon in Galactic Bulge PNe
<i>Aims. <i/>We investigate the dual-dust chemistry phenomenon in planetary nebulae (PNe) and discuss reasons for its occurrence, by analyzing Spitzer/IRS spectra of a sample of 40 Galactic PNe among which 26 belong to the Galactic Bulge (GB).<i>Methods. <i/>The mixed chemistry is derived from the simultaneous detection of Polycyclic Aromatic Hydrocarbon …