# Panchromatic Study of the First Galaxies with Large ALMA Programs

## TL;DR

This paper reviews the progress in studying early universe galaxies through multi-wavelength surveys, highlighting ALMA's role in advancing panchromatic observations of high-redshift galaxies.

## Contribution

It introduces the significance of ALMA's capabilities in expanding panchromatic studies of galaxies at z > 4, complementing optical and infrared data.

## Key findings

- ALMA enables detailed gas and dust measurements of high-redshift galaxies.
- Multi-wavelength surveys provide comprehensive insights into galaxy formation.
- Recent surveys like ALPINE focus on normal main-sequence galaxies at z > 4.

## Abstract

Thanks to deep optical to near-IR imaging and spectroscopy, significant progress is made in characterizing the rest-frame UV to optical properties of galaxies in the early universe (z > 4). Surveys with Hubble, Spitzer, and ground-based facilities (Keck, Subaru, and VLT) provide spectroscopic and photometric redshifts, measurements of the spatial structure, stellar masses, and optical emission lines for large samples of galaxies. Recently, the Atacama Large (Sub) Millimeter Array (ALMA) has become a major player in pushing studies of high redshift galaxies to far-infrared wavelengths, hence making panchromatic surveys over many orders of frequencies possible. While past studies focused mostly on bright sub-millimeter galaxies, the sensitivity of ALMA now enables surveys like ALPINE, which focuses on measuring the gas and dust properties of a large sample of normal main-sequence galaxies at z > 4. Combining observations across different wavelengths into a single, panchromatic picture of galaxy formation and evolution is currently and in the future an important focus of the astronomical community.