The formation of primary galactic nuclei during phase transitions in the early universe

By S. Rubin, Alexander S. Sakharov, Maxim Yu. Khlopov. 2001

197 citations recorded by the source corpus.

A new mechanism describing the formation of protogalaxies is proposed, based on the second-order phase transition in the inflation stage and the domain wall formation upon the end of inflation. The presence of closed domain walls with the size markedly exceeding the cosmological horizon at the instant of their formation and the wall collapse in the postinflation epoch (when the wall size becomes comparable with the cosmological horizon) lead to the formation of massive black hole clusters that can serve as nuclei for the future galaxies. The black hole mass distributions obtained do not contradict the available experimental data. The number of black holes with M ∼ 100 solar masses (M⊙) and above is comparable with the number of galaxies in the visible Universe. Development of the proposed approach gives grounds for a principally new scenario of galaxy formation in the model of a hot Universe.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/a7e54a2b8d39b90a04bc988af3e2b8822abf0bde

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In Astronomy and Astrophysics

Citations in the corpus

Primordial Black Holes as Dark Matter: Recent Developments (2020, background): “However, they could be much larger if one invoked a non-equilibrium scenario [128].”
Effect of Primordial Black Holes on the Cosmic Microwave Background and Cosmological Parameter Estimates (2007, background): “Other possible scenarios for PBH formation involve non-Gaussian perturbations produced by cosmic strings, cosmic string collapse or bubble collisions following second-order phase transitions (e.g., Polnarev & Zembowicz 1991; Rubin et al. 2001; Stojkovic et al. 2005; Nozari 2007).”
Primordial Black Holes from Polynomial Potentials in Single Field Inflation (2017, unknown): “…PBHs are only a small fraction of the energy budget of the universe, they could still lead to interesting astrophysical phenomena, such as acting as a seed for the production of super massive black holes at the center of galaxies [7–9], or producing binary mergers and gravitational waves [10–13].”
Primordial black holes as dark matter candidates (2021, background): “However, they could be much larger in a non-equilibrium scenario [90].”