Pop III Supernova feedback on The Formation of The First Galaxies

Li-Hsin Chen^1,2*, Ke-Jung (Ken) Chen¹

¹Institute of Astronomy and Astrophysics, Academia Sinica, Taipei, Taiwan
²Institute of Astrophysics, National Taiwan University, Taipei, Taiwan

* Presenter:Li-Hsin Chen, email:r06244001@ntu.edu.tw

Modern cosmological simulations suggest that the hierarchical assembly of dark matter halos provided the gravitational wells that allowed the primordial gases to form stars and galaxies inside them. The first galaxies comprised of the first systems of stars gravitationally bound in dark matter halos are naturally recognized as the building blocks of early Universe. To understand the formation and evolution of the first galaxies, we first model an isolated galaxy by considering much microphysics such as gas dynamics, self-gravity, star formation, stellar feedback, and cooling processes of primordial gas and metals. To examine the effect of Pop III supernovae feedback of first stars to the first galaxy formation, we set up the initial temperature, density, and metallicity distributions of Pop III supernova bubbles by assuming different IMF of Pop III stars. We use an adaptive mesh refinement (AMR) cosmological code, ENZO to perform the simulation and our results suggest that star formation in the first galaxies is sensitive to yields and energetics of the first supernovae. The IMF of next generation of stars varies by different PopIII IMFs. Therefore, our study can provide a channel to correlate the populations of the first stars and supernovae to star formation inside these first galaxies which may be soon observed by the JWST.

Keywords: First Galaxies, Computational Astrophysics, Galaxy Formation and Evolution