Gravitational Collapse in the Post-Inflationary Universe
arXiv:2110.15109 · doi:10.1103/PhysRevD.105.023516
Abstract
The Universe may pass through an effectively matter-dominated epoch between inflation and Big Bang Nucleosynthesis during which gravitationally bound structures can form on subhorizon scales. In particular, the inflaton field can collapse into inflaton halos, forming "large scale" structure in the very early universe. We combine N-body simulations with high-resolution zoom-in regions in which the non-relativistic Schrödinger-Poisson equations are used to resolve the detailed, wave-like structure of inflaton halos. Solitonic cores form inside them, matching structure formation simulations with axion-like particles in the late-time universe. We denote these objects \textit{inflaton stars}, by analogy with boson stars. Based on a semi-analytic formalism we compute their overall mass distribution which shows that some regions will reach overdensities of if the early matter-dominated epoch lasts for 20 -folds. The radii of the most massive inflaton stars can shrink below the Schwarzschild radius, suggesting that they could form primordial black holes prior to thermalization.
arXiv comment9 pages, 6 figures, accepted by PRD
References in corpus (52)
- Planck 2018 results. X. Constraints on inflation
- Towards the Theory of Reheating After Inflation
- Cold and Fuzzy Dark Matter
- Ultralight scalars as cosmological dark matter
- A Multi-Code Analysis Toolkit for Astrophysical Simulation Data
- Cosmic Structure as the Quantum Interference of a Coherent Dark Wave
- Universe Reheating after Inflation
- Multi-scale initial conditions for cosmological simulations
- Dynamical Boson Stars
- How long before the end of inflation were observable perturbations produced?
- Understanding the Core-Halo Relation of Quantum Wave Dark Matter, DM, from 3D Simulations
- Challenges and Opportunities of Gravitational Wave Searches at MHz to GHz Frequencies
- Galaxy Formation with BECDM: I. Turbulence and relaxation of idealised haloes
- Oscillons: Resonant Configurations During Bubble Collapse
- Simulations of solitonic core mergers in ultra-light axion dark matter cosmologies
- Oscillons After Inflation
- Pseudo-Stable Bubbles
- Gravitational Bose-Einstein condensation in the kinetic regime
- Self-resonance after inflation: oscillons, transients and radiation domination
- Formation and structure of ultralight bosonic dark matter halos
- Evolution of the Schrödinger--Newton system for a self--gravitating scalar field
- Halo Mass Function and the Free Streaming Scale
- Baryon Asymmetry, Dark Matter, and Density Perturbation from PBH
- The Equation of State and Duration to Radiation Domination After Inflation
- Dark Radiation and Superheavy Dark Matter from Black Hole Domination
- Small-scale structure of fuzzy and axion-like dark matter
- Inflation and the Scale Dependent Spectral Index: Prospects and Strategies
- Melanopogenesis: Dark Matter of (almost) any Mass and Baryonic Matter from the Evaporation of Primordial Black Holes weighing a Ton (or less)
- Black Hole Genesis of Dark Matter
- Primordial black hole formation in the matter-dominated phase of the Universe
- Primordial black holes from the preheating instability
- Formation and mass growth of axion stars in axion miniclusters
- On the Schrodinger-Poisson--Vlasov-Poisson correspondence
- Inflaton Fragmentation and Oscillon Formation in Three Dimensions
- Black hole formation from axion stars
- New insights into the formation and growth of boson stars in dark matter halos
- Primordial black hole production due to preheating
- Dark Matter Axion Clump Resonance of Photons
- Collapse of Small-Scale Density Perturbations during Preheating in Single Field Inflation
- AxioNyx: Simulating Mixed Fuzzy and Cold Dark Matter
- Non-thermal Production of Dark Matter from Primordial Black Holes
- Schrödinger method as N-body double and UV completion of dust
- Delayed Reheating and the Breakdown of Coherent Oscillations
- Radio-emission of axion stars
- Generation of gravitational waves during early structure formation between cosmic inflation and reheating
- Lighting the Dark: The Evolution of the Post-Inflationary Universe
- Primordial Black Hole Formation During Slow Reheating After Inflation
- Primordial black hole constraints in cosmologies with early matter domination
- Constraining Inflation
- Formation of inflaton halos after inflation
- Inflaton Clusters and Inflaton Stars
- Collapse threshold for a cosmological Klein Gordon field
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- Structure of Axion Miniclusters
- Polarized Vector Oscillons
- Deep zoom-in simulation of a fuzzy dark matter galactic halo
- Soliton Formation and the Core-Halo Mass Relation: An Eigenstate Perspective
- Axion minivoids and implications for direct detection
- Soliton Merger Rates and Enhanced Axion Dark Matter Decay
- Maximum mass of relativistic self-gravitating Bose-Einstein condensates with repulsive or attractive self-interaction
- Improved Mixed Dark Matter Halo Model for Ultralight Axions
- Threshold of Primordial Black Hole Formation against Velocity Dispersion in Matter-Dominated Era
- Stochastic Gravitational Waves from Post-inflationary Structure Formation
- Production of PBHs from inflaton structure
- A Faster Growth of Perturbations in an Early Matter Dominated Epoch: Primordial Black Holes and Gravitational Waves