Items where Author is "Gerhard, Ortwin"

Number of items: 7.
Article
  • Unveiling Galaxy Chemical Enrichment Mechanisms Out to z ∼ 8 from Direct Determination of O and Ar Abundances from JWST/NIRSPEC Spectroscopy. (2025) Souradeep Bhattacharya, Magda Arnaboldi, Ortwin Gerhard, Chiaki Kobayashi and Kanak Saha
  • On the α /Fe Bimodality of the M31 Disks. (2023) Chiaki Kobayashi, Souradeep Bhattacharya, Magda Arnaboldi and Ortwin Gerhard
  • 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
  • Self-consistent modelling of the Milky Way's Nuclear Stellar Disc. (2022) Mattia C. Sormani, Jason L. Sanders, Tobias K. Fritz, Leigh C. Smith, Ortwin Gerhard, Rainer Schoedel, John Magorrian, Nadine Neumayer, Francisco Nogueras-Lara, Anja Feldmeier-Krause, Alessandra Mastrobuono-Battisti, Mathias Schultheis, Banafsheh Shahzamanian, Eugene Vasiliev, Ralf S. Klessen, Philip Lucas and Dante Minniti
  • The Milky Way bar/bulge in proper motions: a 3D view from VIRAC & Gaia. (2019) Jonathan P. Clarke, Christopher Wegg, Ortwin Gerhard, Leigh C. Smith, Philip Lucas and Shola M. Wylie
    • 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