JWST Advanced Deep Extragalactic Survey (JADES) Data Release 5: Photometrically Selected Galaxy Candidates at z > 8

2026/01/22 by Kevin N. Hainline, Daniel J. Eisenstein, Lily Whitler +34 · 1 voice
#astro-ph.GA

paper · pdf

Abstract

We present a sample of 2081 sources selected at photometric redshift z_phot > 8 across the JADES DR5 data release in GOODS-S and GOODS-N over a total area of 469 square arcmin. These sources range from M_UV = -22 to M_UV = -16, with 19 objects at z_phot > 14. We estimate the UV slopes for the full sample from fits to the photometry and find evidence for a steepening of the relationship between the UV continuum slope and M_UV to higher redshifts, a result that differs from prior analyses of brighter samples in the literature. We provide evidence that over one quarter of our sources have evidence for being morphologically extended, with many galaxies showing multiple bright knots or clumps even out to z ∼ 13 - 14, an indication of how galaxies at Cosmic Dawn are growing and evolving. We discuss JADES-GN+189.15982+62.28899, a GOODS-N F200W dropout galaxy at z_phot ∼ 15 - 18 which has been observed spectroscopically with JWST/NIRSpec in prism mode, resulting in a very low signal-to-noise spectrum that is consistent with the photometry and rules out a number of low-redshift solutions for the source. Finally, we use a subsample of 123 objects in our sample with spectroscopic redshifts to explore the usage of alternate fitting templates and a prescription for Ly-α damping wing absorption, finding that both produce significant improvements to the estimated photometric redshifts.

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Discussions

• My contribution to the JADES DR5 release was a paper showing off the TWO THOUSAND AND EIGHTY ONE farthest galaxies and candidates in the survey, a treasure trove of cosmic dawn objects that help us un [bsky, 10 points, 1 comments]

Related

• The Cosmos in its Infancy: JADES Galaxy Candidates at z &gt; 8 in GOODS-S and GOODS-N
• JADES Data Release 4 Paper I: Sample Selection, Observing Strategy and Redshifts of the complete spectroscopic sample
• Detection of New Galaxy Candidates at z &gt; 11 in the JADES Field Using JWST NIRCam
• Searching for Emission Lines at z&gt;11: The Role of Damped Lyman-α and Hints About the Escape of Ionizing Photons
• Pushing JWST to the extremes: search and scrutiny of bright galaxy candidates at z≃15-30