Probing the Nature of the First Galaxies with JWST and ALMA

Abstract

By implementing a model of primordial dust emission, we predict dust-continuum fluxes for massive galaxy sources similar to those recently detected by JWST at $z\gtrsim 7$. Current upper flux limits, obtained with ALMA for some of these sources, can constrain gas metallicity and dust fraction of the first galaxies. Encouragingly, if assuming expected properties for typical first galaxies (i.e., dust-to-metal mass ratio: $D/M=5\times 10^{-3}$, gas metallicity: $Z_{\mathrm{g}}=5\times 10^{-3}{Z}_{\odot }$, star formation efficiency: $\eta =0.01$), model far-infrared (FIR) fluxes are consistent with current upper flux limits inferred from ALMA bands 6 and 7 ($\lesssim 10^4$ nJy). Such low $D/M$ values and metallicities are in agreement with some scenarios proposed in the literature to explain the non-detection of the FIR dust continuum for high-$z$ JWST galaxy candidates. On the other hand, higher values of model parameters $D/M$ ($\gtrsim 0.06$) and $Z_{\mathrm{g}}$ ($\gtrsim 5\times 10^{-2}{Z}_{\odot }$) are ruled out by observational data, unless a higher $\eta$ is assumed. According to our findings, ALMA multi-band observations could constrain the dust chemistry and dust grain size distribution in the early universe. In this context, future observational challenges would involve not only reaching higher FIR sensitivities, but also increasing the wavelength coverage by exploring distinct ALMA bands.

arXiv comment7 pages, 2 figures. Accepted for publication in ApJL

References in corpus (32)

• Planck 2013 results. XVI. Cosmological parameters
• Starburst99: Synthesis Models for Galaxies with Active Star Formation
• The Structure of Dark Matter Haloes in Dwarf Galaxies
• A Comprehensive Study on Galaxies at z~9-16 Found in the Early JWST Data: UV Luminosity Functions and Cosmic Star-Formation History at the Pre-Reionization Epoch
• The First Galaxies
• Optimization of Starburst99 for Intermediate-Age and Old Stellar Populations
• Dust Formation and Survival in Supernova Ejecta
• A Long Time Ago in a Galaxy Far, Far Away: A Candidate z ~ 12 Galaxy in Early JWST CEERS Imaging
• The Cosmic Baryon and Metal Cycles
• The spectral evolution of the first galaxies. I. James Webb Space Telescope detection limits and color criteria for population III galaxies
• Discovery and properties of ultra-high redshift galaxies ($9<z<12$) in the JWST ERO SMACS 0723 Field
• Revealing Galaxy Candidates out to $z\sim 16$ with JWST Observations of the Lensing Cluster SMACS0723
• Production of dust by massive stars at high redshift
• Pre-galactic metal enrichment - The chemical signatures of the first stars
• Two populations of metal-free stars in the early Universe
• The chemistry of population III supernova ejecta: II - The nucleation of molecular clusters as a diagnostic for dust in the early universe
• Dusty galaxies in the Epoch of Reionization: simulations
• Accelerating early massive galaxy formation with primordial black holes
• The physics of Lyman-alpha escape from high-redshift galaxies
• A Search for H-Dropout Lyman Break Galaxies at z~12-16
• Probing Pre-galactic Metal Enrichment with High-Redshift Gamma-Ray Bursts
• Clustering and Halo Abundances in Early Dark Energy Cosmological Models
• Deep ALMA redshift search of a z~12 GLASS-JWST galaxy candidate
• Ultraviolet Luminosity Density of the Universe During the Epoch of Reionization
• The Chemical Imprint of Silicate Dust on the Most Metal-Poor Stars
• The Far Infrared Emission of the First Massive Galaxies
• An upper limit on [OIII] 88 $\mu$m and 1.2 mm continuum emission from a JWST $z\approx 12-13$ galaxy candidate with ALMA
• Dust in the first galaxies
• Interpreting ALMA non-detections of JWST super-early galaxies
• To see or not to see a $z\sim 13$ galaxy, that is the question
• Contribution of the first galaxies to the cosmic far-infrared/sub-millimeter background - I. Mean background level
• Redshift Horizon for Detecting the First Galaxies in Far-Infared Surveys

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