TL;DR
This paper reviews current high redshift galaxy surveys, highlighting observational methods like Lyman alpha emitters, gravitational lensing, and surveys for quasars and gamma-ray bursts to understand early universe galaxy evolution.
Contribution
It provides a comprehensive overview of observational techniques and recent advancements in high redshift galaxy surveys, emphasizing their role in studying cosmic dawn.
Findings
Advances in detecting Lyman alpha emitters and Lyman break galaxies.
Use of gravitational lensing to observe faint distant galaxies.
Progress in surveys for quasars and gamma-ray bursts.
Abstract
A brief overview on the current status of the census of the early universe population is given. Observational surveys of high redshift galaxies provide direct opportunities to witness the cosmic dawn and to have better understanding of how and when infant galaxies evolve into mature ones. It is a much more astronomical approach in contrast to the physical approach of to study the spatial fluctuation of cosmic microwave radiation. Recent findings in these two areas greatly advanced our understanding of the early Universe. I will describe the basic properties of several target objects we are looking for and the concrete methods astronomers are using to discover those objects in early Universe. My talk starts with Lyman alpha emitters and Lyman break galaxies, then introduces a clever approach to use gravitational lensing effect of clusters of galaxies to detect distant faint galaxies…
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