PRISMS. U37126, a very blue, ISM-naked starburst at z=10.255 with nearly 100% Lyman continuum escape fraction

arXiv (Cornell University) 2026 Preprint Open access

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Authors: R. Marques-Chaves, J. Álvarez-Márquez, L. Colina, S. Kendrew, Abdurro'uf, C. Blanco-Prieto, L. A. Boogaard, M. Castellano, K. I. Caputi, A. Crespo-Gomez, A. Fontana, Y. Fudamoto
+22 more S. Fujimoto, M. García-Marín, Y. Harikane, S. Harish, T. Hashimoto, T. Hsiao, E. Iani, A. K. Inoue, D. Langeroodi, R. Lin, J. Melinder, L. Napolitano, G. Ostlin, P. G. Pérez-González, C. Prieto-Jiménez, P. Rinaldi, B. Rodríguez Del Pino, P. Santini, Y. Sugahara, A. Varo-O'ferral, G. Wright, J. Zavala
DOI: 10.48550/arxiv.2602.02322
Cited by: 1

Abstract

We present very deep (~11h) JWST/MIRI low-resolution spectroscopy of the rest-frame optical emission of U37126, a UV-bright (M_UV ~ -20), mildly lensed ($μ\simeq 2.2$) galaxy at z=10.255. The continuum emission is well detected in both NIRSpec and MIRI spectra, yet no nebular recombination or metal emission lines are observed (EW(Hbeta+[OIII])

Fields of Study & Subjects

Galaxies: Formation Evolution Phenomena Astronomy and Astrophysical Research Astrophysics and Star Formation Studies

Publication details

Journal / source
arXiv (Cornell University)
Publication date
2 February 2026
Document type
Preprint