Image Details
Caption: Figure 1.
Left: 4 arcmin2 pseudo-RGB image of the MACS0416 cluster, using JWST/NIRCam F115W + F150W as blue, F200W + F277W as green, and F356W + F444W as red. The location of the ring galaxy is indicated in a magenta box. Right: 2″ cutout of the CRG in JWST F150W imaging (top) and 2″ rescaled RGB cutout of the CRG (bottom), using the F150W, F200W, and F356W filters (corresponding to rest-frame wavelengths of 0.30, 0.40, and 0.71 μm, respectively, at z = 4.0148). In the top panel, we show the ∼3σ ALMA detection from the ALCS survey (S. Fujimoto et al. 2024) as a red contour. The JWST imaging of the CRG clearly reveals a ring morphology; we have scaled the channels of the RGB cutout to emphasize the clumpy blue ring surrounding the red center of the system.
© 2026. The Author(s). Published by the American Astronomical Society.