Hints of enhanced magnetic activity after the intermediate rotation period gap as traced by the chromospheric Ca ii infrared triplet

arXiv:2607.05651 · astro-ph.SR · Submitted 2026-07-06 · Read on arXiv

Diego Godoy-Rivera, Savita Mathur, Tyler Richey-Yowell, Angela R. G. Santos, Rafael A. Garcia, Desmond H. Grossmann, Zachary R. Claytor, Paul G. Beck

astro-ph.SR

Submitted: 2026-07-06

Comments: Accepted for publication in A&A. 15 pages, 9 figures, 3 tables. Machine-readable tables are available at https://zenodo.org/records/21086333

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

Terminology

• Metallicity — 6× in this paper · explained in 3 episodes
• Trace — 5× in this paper · explained in 2 episodes
• Active Regions — 2× in this paper · explained in 1 episode
• Core — 2× in this paper · explained in 2 episodes
• Alignment — 1× in this paper · explained in 1 episode
• Homogeneity — 1× in this paper · explained in 2 episodes
• International Space Science Institute — 1× in this paper

Sources

• Rotation Periods for Stars in Open Cluster NGC 6819 From Kepler IRIS Light Curves

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