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

A. K. Inoue, I. Shimizu, Y. Tamura, H. Matsuo, T. Okamoto, N. Yoshida

研究成果: Article査読

33 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号L18
ジャーナルAstrophysical Journal Letters
780
2
DOI
出版ステータスPublished - 2014 1月 10
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

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