Items where Author is "Hartke, Johanna"

Item Type No Grouping

Article

The survey of planetary nebulae in Andromeda (M31). IV. Radial oxygen and argon abundance gradients of the thin and thicker disc. (2022) Souradeep Bhattacharya, Magda Arnaboldi, Nelson Caldwell, Ortwin Gerhard, Chiaki Kobayashi, Johanna Hartke, Kenneth C. Freeman, Alan W. McConnachie and Puragra Guhathakurta

The survey of planetary nebulae in Andromeda (M 31) V. Chemical enrichment of the thin and thicker discs of Andromeda. Oxygen to argon abundance ratios for planetary nebulae and H II regions. (2022) Magda Arnaboldi, Souradeep Bhattacharya, Ortwin Gerhard, Chiaki Kobayashi, Kenneth C. Freeman, Nelson Caldwell, Johanna Hartke, Alan McConnachie and Puragra Guhathakurta

Conference or Workshop Item

The Andromeda Galaxy’s Last Major Merger: Constraints from the survey of Planetary Nebulae. (2024) Souradeep Bhattacharya, Magda Arnaboldi, Ortwin Gerhard, Nelson Caldwell, Chiaki Kobayashi, Francois Hammer, Yanbin Yang, Kenneth C. Freeman, Johanna Hartke and Alan McConnachie