Seimei KOOLS-IFU mapping of the gas and dust distributions in Galactic PNe: the origin and evolution of DdDm1

Masaaki Otsuka

We conduct a detailed study of the planetary nebula (PN) DdDm1 in the Galactic halo field. DdDm1 is a metal-deficient and the most carbon-poor PN (C/O = 0.11 +/- 0.02) identified i…