A Galaxy with an Extremely Blue Ultraviolet Slope β = −3 at z = 9.25 Identified by JWST Spectroscopy: Evidence for a Weak Nebular Continuum and Efficient Ionizing Photon Escape?

A Galaxy with an Extremely Blue Ultraviolet Slope β = −3 at z = 9.25 Identified by JWST Spectroscopy: Evidence for a Weak Nebular Continuum and Efficient Ionizing Photon Escape?

We investigate UV continuum slopes β of 863 galaxies at 4 <  z  < 14 using archival JWST/NIRSpec PRISM spectra obtained from major JWST Guaranteed Time Observations (GTO), Early Release Science (ERS), and General Observers (GO) programs, including JADES, CEERS, and UNCOVER. Among these galaxie...

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Main Authors: Hiroto Yanagisawa, Masami Ouchi, Kimihiko Nakajima, Yuichi Harikane, Seiji Fujimoto, Yoshiaki Ono, Hiroya Umeda, Minami Nakane, Hidenobu Yajima, Hajime Fukushima, Yi Xu
Format: Article
Language:English
Published: IOP Publishing 2025-01-01
Series:The Astrophysical Journal
Subjects:
Galaxy evolution
Galaxy formation
High-redshift galaxies
Ultraviolet color
Reionization
Online Access:https://doi.org/10.3847/1538-4357/adcecd
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https://doi.org/10.3847/1538-4357/adcecd

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