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Infrared Space Observatory Observations of the 53W002 Group at 6.7 Microns: In Search of the Oldest Stellar Populations at z = 2.4

Keel, William C.; Windhorst, Rogier A.; Eales, Stephen A. +5 more

We present a deep Infrared Space Observatory (ISO) observation at 6.7 µm of the 53W002 group of galaxies and active galactic nuclei (AGNs) at z=2.4. This approximately samples the emitted K band. Faint, blue star-forming objects are not detected, as expected from their very blue color across the emitted optical and UV spectrum. However, 53W0…