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We study the supermassive black holes (SMBHs) observed in the galactic centers. Although the origin of SMBHs is not well understood yet, previous studies suggest that seed black holes (BHs) with masses 10^4-5 M_ exist at a high redshift (z~10). We examine whether primordial black holes (PBHs) produced by inhomogeneous baryogenesis can explain those seed black holes. Inhomogeneous baryogenesis is realized in the modified Affleck-Dine mechanism. In this scenario, there is no stringent constraint from cosmic microwave background μ-distortion in contrast to the scenario where Gaussian fluctuations collapse into PBHs. It is found that the model can account for the origin of the seed BHs of the SMBHs.
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Kawasaki et al. (2019) studied this question.
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