We present a sample of z ₇₎ₓ10-16 galaxies by exploiting one of the richest JWST NIRCam imaging data, taken in the CANUCS survey in Cycle 1 and the Technicolor (TEC) survey in Cycle 2. The combination of the CANUCS+TEC provides multi-epoch, deep NIRCam images in all medium bands (MBs) and broad bands (BBs) onboard NIRCam (22 filters in total), over 23\ arcmin² in three independent lines of sight. We select high-z galaxy candidates based on photometric redshifts, and obtain eight candidates at z10-16, including a very robust candidate at z15. 4. The ultraviolet (UV) luminosity function (LF) from our sample is consistent with previous JWST studies showing a scatter of 0. 6 dex across the literature, marking the significance of the field-to-field variance in interpreting galaxy abundance measurements at z>10. We find that the UV LF moderately evolves at z>10, and the LF normalization and the luminosity density decline by a factor of 7 from z11 to z15, indicating less steep evolution than z10, including the UV LF by 0. 6 dex, the size-magnitude relation by 0. 6 dex, and the UV slope-magnitude relation by Δβ ₔₕ-0. 3.
Asada et al. (Thu,) studied this question.
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