Mass-to-light Ratio of Ly Emitters: Implications of Ly Surveys at Redshifts z = 5.7, 6.5, 7, and 8.8

摘要

We present a simple, relatively model-independent method to interpret the galaxy number count data at z>6. The only free parameter is a mass-to-“observed light” ratio, Mh/Lband, where Mh refers to the total mass of the host halo, and Lband refers to the observed luminosity of the source. For narrow-band surveys, Lband is simply related to the intrinsic Ly luminosity with a survival fraction of Ly photons, esc. The mass-to-“bolometric light”, Mh/Lbol, can also be found, once the metallicity and initial mass function of stellar populations are given. We find constraints on the mass-to-light ratio of Ly-alpha emitters from 5.7