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Supermassive black hole formation from Affleck-Dine mechanism with suppressed clustering on large scales
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We study a primordial black hole (PBH) formation model based on the framework of the inhomogeneous Affleck-Dine (AD) mechanism, which can explain the seeds of supermassive black holes (SMBHs). This model, however, predicts strong clustering of SMBHs that is inconsistent with the observation of angular correlation of quasars. In this paper, we propose a modified model that can significantly reduce the PBH clustering on large scales by considering a time-dependent Hubble-induced mass during inflation. The quasar angular correlation is suppressed by the large Hubble-induced mass in the early stage of inflation while the small Hubble-induced mass in the late stage leads to the AD field fluctuations large enough for PBH formation as in the original model. As a result, the modified scenario can successfully explain the seeds of SMBHs.
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Primordial Black Hole Formation via Inverted Bubble Collapse
Isolated bubbles from an incomplete phase transition, inverted into false-vacuum regions by a later bulk transition, collapse into nearly monochromatic primordial black holes up to about 10^-5 solar masses.
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