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JWST imaging of the closest globular clusters—I. Possible infrared excess among white dwarfs in NGC 6397

Salaris, M.; Apai, D.; Anderson, J. +9 more

We present James Webb Space Telescope observations of the globular cluster NGC 6397 and use them to extend to infrared wavelengths the characterization of the cluster's entire white dwarf (WD) cooling sequence (CS). The data allows us to probe fundamental astrophysical WD properties and to search for evidence in their colors for (or against) the e…