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arxiv 1312.0684 v1 pith:WCGFYXDC submitted 2013-12-03 astro-ph.GA astro-ph.CO

ALMA will determine the spectroscopic redshift z>8 with FIR [O III] emission lines

Akio K. Inoue (1) , Ikkoh Shimizu (1 , 2) , Yoichi Tamura (2) , Hiroshi Matsuo (3) , Takashi Okamoto (4) , Naoki Yoshida (2) ((1) Osaka Sangyo University , (2) University of Tokyo
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(3) NAOJ (4) Hokkaido University)
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keywords linealmagalaxiesmicronspectroscopicemissionlinesmetallicity
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We investigate the potential use of nebular emission lines in the rest-frame far-infrared (FIR) for determining spectroscopic redshift of z>8 galaxies with the Atacama Large Millimeter/sub-millimeter Array (ALMA). After making a line emissivity model as a function of metallicity, especially for the [O III] 88 micron line which is likely to be the strongest FIR line from H II regions, we predict the line fluxes from high-z galaxies based on a cosmological hydrodynamics simulation of galaxy formation. Since the metallicity of galaxies reaches at ~0.2 Zsun even at z>8 in our simulation, we expect the [O III] 88 micron line as strong as 1.3 mJy for 27 AB objects, which is detectable at a high significance by <1 hour integration with ALMA. Therefore, the [O III] 88 micron line would be the best tool to confirm the spectroscopic redshifts beyond z=8.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Astro2020 Science White Paper: Exploration and characterization of the earliest epoch of galaxy formation: beyond the re-ionization era

    astro-ph.GA 2019-07 unverdicted novelty 2.0

    The paper proposes two survey strategies to find statistically large numbers of z=10-15 galaxies before reionization using [OIII] spectroscopy or pop-III GRB transients.