Radio Selected NIR-dark sources shedding light on the dark side of high redshift SFR

Abstract

About 12 billion years ago, the Universe was first experiencing light again after the dark ages, and galaxies filled the environment with stars, metals, and dust. How efficient was this process, and how fast did these primordial galaxies form stars and dust? We can answer these questions by tracing galaxies star formation rate density (SFRD) back to its unexplored high redshift tail, traditionally observed in the Near-InfraRed (NIR), Optical, and UV-bands. This means that the dustiest objects were missing. Further, most studies on dust obscured galaxies at high redshift have been conducted in the sub-millimetre, possibly affected by dust temperature biases. In this talk, I will introduce you to the characterisation of Radio Selected NIR-dark (RS-NIRdark) sources in different fields with a panchromatic approach and new SED-fitting techniques developed by the GOThA (Galaxy Observational and Theoretical Astrophysics) group in SISSA.