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arxiv: 2410.23959 · v1 · pith:6C4O7LUO · submitted 2024-10-31 · astro-ph.GA · astro-ph.CO

CEERS: Forging the First Dust -- Transition from Stellar to ISM Grain Growth in the Early Universe

Denis Burgarella , V\'eronique Buat , Patrice Theul\'e , Jorge Zavala , Pablo Arrabal Haro , Micaela B. Bagley , M\'ed\'eric Boquien , Nikko Cleri
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Tim Dewachter Mark Dickinson Henry C. Ferguson Vital Fern\'andez Steven L. Finkelstein Adriano Fontana Eric Gawiser Andrea Grazian Norman Grogin Benne W. Holwerda Jeyhan S. Kartaltepe Lisa Kewley Allison Kirkpatrick Dale Kocevski Anton M. Koekemoer Arianna Long Jennifer Lotz Ray A. Lucas Bahram Mobasher Casey Papovich Pablo G. P\'erez-Gonz\'alez Nor Pirzkal Swara Ravindranath Giulia Rodighiero Yannick Roehlly Caitlin Rose Lise-Marie Seill\'e Rachel Somerville Steve Wilkins Guang Yang L. Y. Aaron Yung
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keywords galaxiesdustdominatedgraingrowthjwstmassmetals
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We investigate the coevolution of metals and dust for 173 galaxies at 4.0<z<11.4 observed with JWST/NIRSpec. We use the code CIGALE that integrates photometric and spectroscopic data. Our analysis reveals a critical transition at Mstar = 10^8.5 MSun, from galaxies dominated by supernovae and AGB stardust, to those dominated by grain growth. This implies a two-mode building of dust mass, supported by model predictions. The detection of stardust galaxies provides a natural and inherent explanation to the excess of UV-bright galaxies at z>10 by JWST. Besides, we observe that the metallicity of galaxies at z>8 presents a metal-to-stellar mass ratio larger than a few 10^-3, above a floor. This suggests a very fast rise of metals at high redshift, impacting the tentative detections of population III objects.

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