Publication Date:
2016-07-22
Description:
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 ] 3727 Å and [O iii ] 4959/5007 Å 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 Hα and Hβ 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 ] 4959/5007 Å and Hβ 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.
Print ISSN:
0035-8711
Electronic ISSN:
1365-2966
Topics:
Physics
