Interpreting ALMA non-detections of JWST super-early galaxies

Abstract

Recent attempts to detect [OIII] 88$\mu$m emission from super-early ($z>10$) galaxy candidates observed by JWST have been unsuccessful. By using zoom-in simulations, we show that these galaxies are faint, and mostly fall below the local metal-poor $[\mathrm{OIII}]-\mathrm{SFR}$ relation as a result of their low ionization parameter, $U_{\mathrm{ion}}\lesssim 10^{-3}$. Such low $U_{\mathrm{ion}}$ values are found in galaxies that are in an early assembly stage, and whose stars are still embedded in high-density natal clouds. However, the most luminous galaxy in our sample ($\log [{\mathrm{L}}_{[\mathrm{OIII}]}/{\mathrm{L}}_{\odot }]=8.4$, $U_{\mathrm{ion}}\approx 0.1$) could be detected by ALMA in only $2.8$ hrs.

6 pages, 3 figures, Submitted to MNRAS (comments are welcome)

References in corpus (15)

• The NumPy array: a structure for efficient numerical computation
• Two Remarkably Luminous Galaxy Candidates at $z\approx 10-12$ Revealed by JWST
• On the Star Formation Efficiency of Turbulent Magnetized Clouds
• The GLASS James Webb Space Telescope Early Release Science Program. I. Survey Design and Release Plans
• The JWST Early Release Observations
• Deep into the structure of the first galaxies: SERRA views
• Zooming on the internal structure of $z\simeq 6$ galaxies
• The impact of chemistry on the structure of high-z galaxies
• Kinematics of $z\ge 6$ galaxies from [CII] line emission
• A Search for H-Dropout Lyman Break Galaxies at z~12-16
• A survey of high-$z$ galaxies: SERRA simulations
• Dual constraints with ALMA: new [O III] 88 $\mu$m and dust-continuum observations reveal the ISM conditions of luminous LBGs at $z\sim 7$
• CO line emission from galaxies in the Epoch of Reionization
• Deep ALMA redshift search of a z~12 GLASS-JWST galaxy candidate
• Dynamical characterization of galaxies up to $z\sim 7$

Cited by in corpus (7)

• Early Results from GLASS-JWST. XIX: A High Density of Bright Galaxies at $z\approx 10$ in the Abell 2744 Region
• ALMA Observation of a $z\gtrsim 10$ Galaxy Candidate Discovered with JWST
• To see or not to see a $z\sim 13$ galaxy, that is the question
• ALMA observations of super-early galaxies: attenuation-free model predictions
• Probing the Nature of the First Galaxies with JWST and ALMA
• Detections of [C II] 158 $\mu$m and [O III] 88 $\mu$m in a Local Lyman Continuum Emitter, Mrk 54, and its Implications to High-redshift ALMA Studies
• Amaryllis: a digital twin of the earliest galaxies in the Universe