Relic gravitational waves from primordial gravitational collapses

arXiv:2504.11275 · gr-qc, astro-ph.CO, hep-ph · Submitted 2025-04-15 · Read on arXiv

gr-qc, astro-ph.CO, hep-ph

Submitted: 2025-04-15

Updated: 2026-09-17

Comments: v3, 5 pages + 7 pages, 3 figures, largely extended supplemental materials with 4 figures, two accompanying papers 2504.12243 (numerical GR simulations for sound waves) and 2512.21151 (improved GR simulations for sound waves + hydrodynamic simulation confirmations for sound-shell collisions) are referred to; v4, version accepted for publication in Sci. China Phys. Mech. Astron

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Abundance — 8× in this paper · explained in 1 episode
• Chinese Academy of Sciences — 8× in this paper
• University of Chinese Academy of Sciences — 6× in this paper
• Phase Transitions — 4× in this paper · explained in 2 episodes
• Asia Pacific Center for Theoretical Physics — 2× in this paper
• Cosmic Explorer — 2× in this paper
• Einstein Telescope — 2× in this paper
• pulsar timing arrays — 2× in this paper · explained in 2 episodes
• Generalization — 1× in this paper · explained in 13 episodes
• Hangzhou Institute for Advanced Study — 1× in this paper
• Homogeneity — 1× in this paper · explained in 2 episodes
• Non-Gaussianity — 1× in this paper · explained in 2 episodes
• Spectral Distortions — 1× in this paper · explained in 2 episodes

Sources

• The NANOGrav 15-year Data Set: Evidence for a Gravitational-Wave Background
• The second data release from the European Pulsar Timing Array III. Search for gravitational wave signals
• Search for an isotropic gravitational-wave background with the Parkes Pulsar Timing Array
• Searching for the nano-Hertz stochastic gravitational wave background with the Chinese Pulsar Timing Array Data Release I
• Laser Interferometer Space Antenna
• Taiji Program: Gravitational-Wave Sources
• TianQin: a space-borne gravitational wave detector
• Detecting the Cosmic Gravitational Wave Background with the Big Bang Observer
• Science Case for the Einstein Telescope
• Cosmic Explorer: The U.S. Contribution to Gravitational-Wave Astronomy beyond LIGO
• Cosmological Backgrounds of Gravitational Waves
• The Gravitational-Wave Physics
• The Gravitational-Wave Physics II: Progress
• Computations of primordial black hole formation
• Primordial black hole formation in the early universe: critical behaviour and self-similarity
• Formalism for Primordial Black Hole Formation in Spherical Symmetry
• A common origin for baryons and dark matter
• Primordial black holes from the QCD epoch: Linking dark matter, baryogenesis and anthropic selection
• Primordial black hole formation by vacuum bubbles
• CMB spectral distortions from black holes formed by vacuum bubbles

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