A luminous and young galaxy at z=12.33 revealed by a JWST/MIRI detection of H{\alpha} and [OIII]

The James Webb Space Telescope (JWST) has discovered a surprising population of bright galaxies in the very early universe (10. These detections place the bright galaxy GHZ2/GLASS-z12 at z=12.33+/-0.04, making it the most distant astronomical object with direct spectroscopic detection of these lines...

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Published in:arXiv.org 2024-11
Main Authors: Zavala, Jorge A, Castellano, Marco, Akins, Hollis B, Tom J L C Bakx, Burgarella, Denis, Casey, Caitlin M, Chávez Ortiz, Óscar A, Dickinson, Mark, Finkelstein, Steven L, Mitsuhashi, Ikki, Nakajima, Kimihiko, Pérez-González, Pablo G, Pablo Arrabal Haro, Bergamini, Pietro, Buat, Veronique, Backhaus, Bren, Calabrò, Antonello, Cleri, Nikko J, Fernández-Arenas, David, Fontana, Adriano, Franco, Maximilien, Grillo, Claudio, Giavalisco, Mauro, Grogin, Norman A, Hathi, Nimish, Hirschmann, Michaela, Ikeda, Ryota, Jung, Intae, Kartaltepe, Jeyhan S, Koekemoer, Anton M, Larson, Rebeca L, McKinney, Jed, Papovich, Casey, Rosati, Piero, Saito, Toshiki, Santini, Paola, Terlevich, Roberto, Terlevich, Elena, Treu, Tommaso, Yung, L Y Aaron
Format: Article
Language:English
Subjects:
Astronomical models
Big bang cosmology
Celestial bodies
Galactic evolution
Galaxies
Hydrogen recombinations
Infrared instruments
Infrared signatures
James Webb Space Telescope
Local group (astronomy)
Oxygen
Physical properties
Space telescopes
Spectral signatures
Star & galaxy formation
Star formation
Stars & galaxies
Universe
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Summary:The James Webb Space Telescope (JWST) has discovered a surprising population of bright galaxies in the very early universe (10. These detections place the bright galaxy GHZ2/GLASS-z12 at z=12.33+/-0.04, making it the most distant astronomical object with direct spectroscopic detection of these lines. These observations provide key insights into the conditions of this primeval, luminous galaxy, which shows hard ionizing conditions rarely seen in the local Universe likely driven by compact and young (~30Myr) burst of star formation. Its oxygen-to-hydrogen abundance is close to a tenth of the solar value, indicating a rapid metal enrichment. This study confirms the unique conditions of this remarkably bright and distant galaxy and the huge potential of mid-IR observations to characterize these objects.
ISSN:2331-8422
DOI:10.48550/arxiv.2403.10491