Fig. 6.
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Detected Lyα halos in the vicinity of A2744-45924. The background image is the NIRCam F070W cutout. The search was performed in a box volume of ≈170 cMpc3 (correcting with the mean magnification of the sources in the field) defined by the FoV of the MUSE data (1.3′×1.3′); however, we only show a cutout where the halos are detected. We show the contours of the Lyα emission detected at z = 4.464 ± 0.02. Each contour level corresponds to a surface brightness increase by a factor of 1.5 (baseline 1.8 × 10−18 erg s−1 cm−2 arcsec−2). Also shown are the positions of the JWST objects with spectroscopic (circles) and photometric (crosses) redshift in the same interval (Naidu et al. 2024; Suess et al. 2024). We detect an elevated number of Lyα halos in the environment of A2744-45924; however, this result is consistent with the galaxy overdensity (Matthee et al. 2025). The total flux of Lyα is moderate to low when compared with the total Hα emission of A2744-45924’s neighbors (See Fig. 7).
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