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https://doi.org/10.3847/2515-5172/acf579
Copy DOIJournal: Research Notes of the AAS | Publication Date: Sep 4, 2023 |
License type: CC BY 4.0 |
Abstract We report a non-detection of the [O i] 63 μm emission line from the z = 6.03 galaxy G09.83808 using ALMA Band 9 observations, refuting the previously claimed detection with APEX by Rybak et al.; the new upper limit on the [O i] 63 μm flux is almost 20-times lower. [O i] 63 μm line could be a powerful tracer of neutral gas in the Epoch of Reionization: yet our null result shows that detecting [O i] 63 μm from z ≥ 6 galaxies is more challenging than previously hypothesized.
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