Panchromatic Study of the First Galaxies with Large ALMA Programs
  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.
