School of Physics CRA Seminar: Myoungwon Jeon, University of Texas at Austin

The first galaxies, which formed a few hundred million years after the big bang, are related to important cosmological questions. Given that they are thought to be the basic building blocks of large galaxies seen today, understanding their formation and properties is essential to studying galaxy formation as a whole. In this talk, I will present the results of our highly-resolved cosmological ab-initio simulations to understand the assembly process of first galaxies under the feedback from the preceding generations of first stars, the so-called Population III. I will discuss key physical quantities of the first galaxies derived from our simulations, such as their stellar population mix, star formation rates, metallicities, and resulting broad-band color and recombination spectra, and their observability using the future facilities such as the James Webb Space Telescope (JWST).