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SuperMassive Black Holes (SMBHs) are ubiquitously found to reside in the center of galaxies. More than 200 SMBHs have been revealed to exist when the universe was less than 1 Gyr old, especially when JWST came into play. In the meanwhile, these SMBHs are relatively overmassive to their host galaxies compared to their local counterparts. The question arises on the formation and obesity nature of high redshift SMBHs. To these concerns, I applied multi-scale simulations to resolve the rapid growth of seed BHs at cosmic dawn, taking into consideration the small-scale BH accretion and the large-scale gas feeding and feedback. Based on simulation results and the merger history of massive dark matter halos, I built a semi-analytical model to account for the rapid evolution and the obesity nature of SMBHs at high redshift (z>6). We also try to provide spectra energy distribution (SED) synthesis based on the calculation for JWST’s search on distant and faint quasars (or their progenitors) at cosmic dawn.
Haojie Hu (胡豪杰) is a Ph.D. graduate of Peking University. His Ph.D. advisor is Prof. Kohei Inayoshi. He mainly studies the rapid growth of seed BHs at high-z (z>6) via theoretical modeling and numerical simulations. He is interested in the AGN feedback in the form of outflows (jets, winds, etc), and co-evolution between rapidly growing seed BHs and their host galaxies at cosmic dawn.
Combined video record by Yiwei Bao & Zhuowen Zhang & Haopeng Zhang & Haojie Hu:
https://vshare.sjtu.edu.cn/open/b756cc92a402676e9b6aa4de41c9f9a0a386bd58ef030570b1d75a2a0150ee77