Astronomy & Astrophysics (A&A)

The survey of planetary nebulae in Andromeda (M31) - V. Chemical enrichment of the thin and thicker discs of Andromeda: Oxygen to argon abundance ratios for planetary nebulae and HII regions

Magda Arnaboldi, Souradeep Bhattacharya, Ortwin Gerhard, Chiaki Kobayashi, Kenneth C. Freeman, Nelson Caldwell, Johanna Hartke, Alan McConnachie and Puragra Guhathakurta

A&A, 666 (2022) A109

Published online: 13 October 2022

DOI: 10.1051/0004-6361/202244258

The survey of planetary nebulae in Andromeda (M31) - V. Chemical enrichment of the thin and thicker discs of Andromeda: Oxygen to argon abundance ratios for planetary nebulae and HII regions

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