Compact extra dimensions as the source of primordial black holes

被引：3

作者：

Nikulin, Valery V. V. ^{[1
]}

Krasnov, Maxim A. A. ^{[1
]}

Rubin, Sergey G. G. ^{[1
,2
]}

机构：

[1] Natl Res Nucl Univ MEPhI, Moscow Engn Phys Inst, Moscow, Russia

[2] Kazan Fed Univ, N I Lobachevsky Inst Math & Mech, Kazan, Russia

来源：

FRONTIERS IN ASTRONOMY AND SPACE SCIENCES | 2022年 / 9卷

关键词：

gravity; extra dimensions; modified gravity; f(R)-gravity; primordial black holes; cosmology; domain wall; MODIFIED GRAVITY; COSMOLOGY; UNIVERSE;

D O I：

10.3389/fspas.2022.927144

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

This article discusses a model of primordial black hole (PBH) formation at the reheating stage. These small/massive black holes appear due to the specific properties of the compact extra dimensions. The latter gives rise to the low energy model, containing an effective scalar field potential capable of domain wall production. Formed during inflation, these walls are quite dense, meaning they collapse soon after inflation ends. Discussion of the model is framed by the scope of multidimensional f(R)-gravity. We study the possibility of the pure gravitational formation of primordial black holes (PBHs). Interpreting the scalar curvature of compact extra space R ( n ) as an effective scalar field in an Einstein framework and consider effective scalar-field theory that might potentially be capable of producing domain walls with a certain choice of parameters. Hence, we demonstrate that f(R)-gravity contains a mechanism for PBH formation. The study assumed that cosmological inflation is an external process, which satisfied all the cosmological constraints on our mechanism.

引用

页数：8

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