The Stellar Populations of Lyman Break Galaxies at $z\sim5$

TL;DR

This study analyzes the stellar populations of Lyman Break Galaxies at redshift approximately 5 using SED fitting, revealing their stellar mass distribution and estimating the cosmic stellar mass density at that epoch.

Contribution

It provides the first detailed stellar mass function for $z\sim5$ LBGs based on a large sample with incompleteness corrections.

Findings

Stellar masses range from $10^{8}$ to $10^{11} M_{\odot}$ with a median of $4 imes 10^{9} M_{\odot}$.

The cosmic stellar mass density at $z\sim5$ is estimated to be $7 imes 10^{6} M_{\odot} extrm{Mpc}^{-3}$.

Abstract

We present the results of Spectral Energy Distribution (SED) fitting analysis for Lyman Break Galaxies (LBGs) at $z\sim5$ in the GOODS-N and its flanking fields. From the SED fitting for $\sim100$ objects, we found that the stellar masses range from $10^{8}$ to $10^{11}M_{\odot}$ with a median value of $4\times10^{9}M_{\odot}$. By using the large sample of galaxies at $z\sim5$, we construct the stellar mass function (SMF) with incompleteness corrections. By integrating down to $10^{8}M_{\odot}$, the cosmic stellar mass density at $z\sim5$ is calculated to be $7\times10^{6}M_{\odot}\textrm{Mpc}^{-3}$.