Assessing Ultra-Cool Dwarf Contamination in Photometrically Selected High-Redshift Galaxy Samples

arXiv:2607.02354 · astro-ph.GA · Submitted 2026-07-02 · Read on arXiv

astro-ph.GA

Submitted: 2026-07-02

Updated: 2026-09-16

Comments: 20 pages, submitted to ApJ, comments welcomed

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Metallicity — 16× in this paper · explained in 3 episodes
• Calibration — 3× in this paper · explained in 7 episodes
• Robustness — 3× in this paper · explained in 5 episodes
• Signal-to-noise ratio (SNR) — 3× in this paper · explained in 2 episodes
• Brightest of Reionizing Galaxies — 1× in this paper
• Clustering — 1× in this paper · explained in 2 episodes
• Consistency — 1× in this paper · explained in 3 episodes
• Pandeia Exposure Time Calculator — 1× in this paper
• Trace — 1× in this paper · explained in 2 episodes

Sources

• Going Wide and Deep with Roman: The z~6-9 UV luminosity function in a Roman Deep Field
• The SpeX Prism Library: 1000+ Low-resolution, Near-infrared Spectra of Ultracool M, L, T and Y Dwarfs
• Physical properties of galaxies and the UV Luminosity Function from $z\sim6$ to $z\sim14$ in COSMOS-Web
• BEACON: JWST NIRCam Pure-parallel Imaging Survey. III. Constraints on the UV LF and the Clustering of z~7-14 Galaxies
• BEACON: JWST NIRCam Pure-parallel Imaging Survey. IV. A Systematic Search for Galaxy Overdensities and Evidence for Gas Accretion Mode Transition

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