JWST Imaging of the Closest Globular Clusters. II. Discovery of Brown Dwarfs in NGC 6397 and Measurement of Age from the Brown Dwarf Cooling Sequence, Using SANDee—A New Grid of Model Isochrones Across the Hydrogen-burning Limit
ASTROPHYSICAL JOURNAL（2024）
Key words
Globular star clusters,Photometry,Stellar populations,Brown dwarfs,Stellar evolutionary models
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