48 citations · 82 across the 4 of their papers we have counts for
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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…