TY - JOUR
T1 - The distribution and physical properties of high-redshift [OIII] emitters in a cosmological hydrodynamics simulation
AU - Moriwaki, Kana
AU - Yoshida, Naoki
AU - Shimizu, Ikkoh
AU - Harikane, Yuichi
AU - Matsuda, Yuichi
AU - Matsuo, Hiroshi
AU - Hashimoto, Takuya
AU - Inoue, Akio K.
AU - Tamura, Yoichi
AU - Nagao, Tohru
PY - 2018/11/21
Y1 - 2018/11/21
N2 - Recent observations with the Atacama Large Millimeter/submillimeter Array (ALMA) detected far-infrared emission lines such as the [OIII] 88μm line from galaxies at z ~ 7-9. We use a cosmological simulation of galaxy formation to study the physical properties of [O III] 88μm emitters. In a comoving volume of 50 h-1 Mpc on a side, we locate 34 galaxies with stellar masses greater than 108 M⊙ at z = 9, and more than 270 such galaxies at z = 7. We calculate the [O III] 88μm luminosities (LOIII,88) by combining a physical model of HII regions with emission line calculations using the photoionization code CLOUDY.We show that the resulting LOIII,88, for a given star formation rate, is slightly higher than predicted from the empirical relation for local galaxies, and is consistent with recent observations of galaxies at redshifts 7-9. Bright [O III] emitters with LOIII,88 > 108 L⊙ have star formation rates higher than 3M⊙ yr-1, and the typical metallicity is ~0.1Z⊙. The galaxies are hosted by dark matter haloes with masses greater than 1011M⊙. We propose to use the [OIII] 5007Å line, to be detected by James Webb Space Telescope, to study the properties of galaxies whose [OIII] 88 μm line emission has been already detected with ALMA.
AB - Recent observations with the Atacama Large Millimeter/submillimeter Array (ALMA) detected far-infrared emission lines such as the [OIII] 88μm line from galaxies at z ~ 7-9. We use a cosmological simulation of galaxy formation to study the physical properties of [O III] 88μm emitters. In a comoving volume of 50 h-1 Mpc on a side, we locate 34 galaxies with stellar masses greater than 108 M⊙ at z = 9, and more than 270 such galaxies at z = 7. We calculate the [O III] 88μm luminosities (LOIII,88) by combining a physical model of HII regions with emission line calculations using the photoionization code CLOUDY.We show that the resulting LOIII,88, for a given star formation rate, is slightly higher than predicted from the empirical relation for local galaxies, and is consistent with recent observations of galaxies at redshifts 7-9. Bright [O III] emitters with LOIII,88 > 108 L⊙ have star formation rates higher than 3M⊙ yr-1, and the typical metallicity is ~0.1Z⊙. The galaxies are hosted by dark matter haloes with masses greater than 1011M⊙. We propose to use the [OIII] 5007Å line, to be detected by James Webb Space Telescope, to study the properties of galaxies whose [OIII] 88 μm line emission has been already detected with ALMA.
KW - Galaxies: evolution
KW - Galaxies: high-redshift
KW - Galaxies: ISM
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U2 - 10.1093/mnrasl/sly167
DO - 10.1093/mnrasl/sly167
M3 - Article
AN - SCOPUS:85054073809
VL - 481
SP - L84-L88
JO - Monthly Notices of the Royal Astronomical Society: Letters
JF - Monthly Notices of the Royal Astronomical Society: Letters
SN - 1745-3933
IS - 1
ER -