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Pop III Supernova Feedback on the Formation of the First Galaxies

Published online by Cambridge University Press:  10 June 2020

Li-Hsin Chen
Affiliation:
Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei10617, Taiwan Institute of Astrophysics, National Taiwan University, Taipei10617, Taiwan
Ke-Jung Chen
Affiliation:
Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei10617, Taiwan

Abstract

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 of the first galaxies, we use an adaptive mesh refinement (AMR) cosmological code, Enzo to simulate the formation and evolution of the first galaxies. We first model an isolated galaxy by considering much microphysics such as star formation, stellar feedback, and primordial gas cooling. To examine the effect of Pop III stellar feedback to the first galaxy formation, we adjust the initial temperature, density distribution and metallicity distributions by assuming different IMFs of the first stars. Our results suggest that star formation in the first galaxies is sensitive to the initial conditions of Pop III supernovae and their remnants. Our study can help to correlate the populations of the first stars and supernovae to star formation inside these first galaxies which may be soon observed by the (James Webb Space Telescope JWST).

Type
Contributed Papers
Copyright
© International Astronomical Union 2020

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