2018/10/16 by Carilli, C. L., Murphy, E. J., Ferrara, A. +1
#Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences
paper · doi:10.48550/arxiv.1810.07536
We consider the capabilities of ALMA and the ngVLA to detect and image the[CII] 158 μm line from galaxies into the cosmic `dark ages' (z ∼ 10 to 20). The [CII] line may prove to be a powerful tool in determining spectroscopic redshifts, and galaxy dynamics, for the first galaxies. In 40 hr, ALMA has the sensitivity to detect the integrated [CII] line emission from a moderate metallicity, active star-forming galaxy [ZA = 0.2 Z\odot; star formation rate (SFR)= 5 M_\odot yr-1], at z = 10 at a significance of 6σ. The ngVLA will detect the integrated [CII] line emission from a Milky-Way like star formation rate galaxy (ZA = 0.2 Z\odot, SFR = 1 M_\odot yr-1), at z = 15 at a significance of 6σ. Imaging simulations show that the ngVLA can determine rotation dynamics for active star-forming galaxies at z ∼ 15, if they exist. The [CII] detection rate in blind surveys will be slow (of order unity per 40 hr pointing.