Radial abundance gradients of 18 elements in Galactic open clusters from infrared MWM spectra A detailed analysis of 655 giants in 133 clusters

arXiv:2608.02563 · astro-ph.GA, astro-ph.SR · Submitted 2026-08-03 · Read on arXiv

S. Bijavara Seshashayana, H. Jönsson, V. D'Orazi, K. Cunha, P. Frinchaboy, J. M. Otto

astro-ph.GA, astro-ph.SR

Submitted: 2026-08-03

Comments: 18 pages, 11 figures, Accepted

Journal ref: Astronomy and Astrophysics, 2026

Code: https://github.com/andycasey/astra

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Abundance — 129× in this paper · explained in 1 episode
• Metallicity — 37× in this paper · explained in 3 episodes
• Milky Way Mapper — 5× in this paper
• Neutron-capture elements — 5× in this paper · explained in 2 episodes
• Consistency — 4× in this paper · explained in 3 episodes
• Benchmark — 3× in this paper · explained in 2 episodes
• Trace — 3× in this paper · explained in 2 episodes
• Apache Point Observatory Galactic Evolution Experiment — 2× in this paper
• Calibration — 2× in this paper · explained in 7 episodes
• External Validation — 2× in this paper · explained in 2 episodes
• Age Gradients — 1× in this paper · explained in 1 episode
• Core — 1× in this paper · explained in 2 episodes
• Robustness — 1× in this paper · explained in 5 episodes

Sources

• Stellar Population Astrophysics (SPA) with the TNG 23 IR elemental abundances of 114 giant stars in 41 Open Clusters
• Stellar Population Astrophysics (SPA) with the TNG: NLTE atmospheric parameters and abundances of giant stars in 33 Open Clusters
• Stellar population astrophysics (SPA) with the TNG. The Phosphorus abundance on the young side of MilkyWay
• PySME v1.0: improved modelling of stellar spectra for survey-scale applications
• The Nineteenth Data Release of the Sloan Digital Sky Survey

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