TY - JOUR
T1 - Alma will determine the spectroscopic redshift z > 8 with FIR [O III] emission lines
AU - Inoue, A. K.
AU - Shimizu, I.
AU - Tamura, Y.
AU - Matsuo, H.
AU - Okamoto, T.
AU - Yoshida, N.
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014/1/10
Y1 - 2014/1/10
N2 - 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/submillimeter Array (ALMA). After making a line emissivity model as a function of metallicity, especially for the [O III] 88 μm 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 Z even at z > 8 in our simulation, we expect the [O III] 88 μm line as strong as 1.3 mJy for 27 AB objects, which is detectable at a high significance by <1 hr integration with ALMA. Therefore, the [O III] 88 μm line would be the best tool to confirm the spectroscopic redshifts beyond z = 8.
AB - 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/submillimeter Array (ALMA). After making a line emissivity model as a function of metallicity, especially for the [O III] 88 μm 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 Z even at z > 8 in our simulation, we expect the [O III] 88 μm line as strong as 1.3 mJy for 27 AB objects, which is detectable at a high significance by <1 hr integration with ALMA. Therefore, the [O III] 88 μm line would be the best tool to confirm the spectroscopic redshifts beyond z = 8.
KW - cosmology: observations
KW - galaxies: evolution
KW - galaxies: high-redshift
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U2 - 10.1088/2041-8205/780/2/L18
DO - 10.1088/2041-8205/780/2/L18
M3 - Article
AN - SCOPUS:84891613639
VL - 780
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
SN - 2041-8205
IS - 2
M1 - L18
ER -