Nebular line emission from z > 7 galaxies in a cosmological simulation: Rest-frame UV to optical lines

Ikkoh Shimizu, Akio K. Inoue, Takashi Okamoto, Naoki Yoshida

研究成果: Article査読

14 被引用数 (Scopus)

抄録

We have performed very large and high-resolution cosmological hydrodynamic simulations in order to investigate detectability of nebular lines in the rest-frame ultraviolet (UV) to optical wavelength range from galaxies at z > 7. We find that the expected line fluxes are very well correlated with the apparent UV magnitudes. The C IV 1549 Å and C III] 1909 Å lines of galaxies brighter than 26 AB magnitudes are detectable with current facilities such as the Very Large Telescope (VLT) XShooter and the Keck Multi-Object Spectrometer for Infra- Red Exploration (MOSFIRE). Metal lines such as C IV 1549 Å, C III] 1909 Å, [O II] 3727Å and [O III] 4959/5007Å are good targets for spectroscopic observation with the Thirty-Metre Telescope (TMT), European Extremely Large Telescope (E-ELT), Giant Magellan Telescope (GMT) and James Webb Space Telescope (JWST). We also expect Ha and Hß lines to be detectable with these telescopes. Additionally, we predict the detectability of nebular lines for z > 10 galaxies, which will be found with JWST, the Wide-Field Infrared Survey Telescope (WFIRST) and First Light And Reionization Explorer (FLARE) (11 ≤ z ≤ 15). We conclude that the C IV 1549 Å, C III] 1909 Å, [O III] 4959/5007Å and Hß lines from even z ~15 galaxies could be strong targets for TMT, E-ELT and JWST. We also find that magnification by gravitational lensing is of great help in detecting such high-z galaxies. According to our model, the C III] 1909 Å line in z > 9 galaxy candidates is detectable even using current facilities.

本文言語English
ページ(範囲)3563-3575
ページ数13
ジャーナルMonthly Notices of the Royal Astronomical Society
461
4
DOI
出版ステータスPublished - 2016 10 1
外部発表はい

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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