Einstein, tea leaves, meandering rivers, and the origin of supermassive black holes in ekpyrotic universe

Abstract

Central supermassive black holes are found in most massive galaxies. However, their origin is still poorly understood. Observations of quasars show that many supermassive black holes existed less than 700 million years after the Big Bang. To explain the existence of such black holes with masses comparable to the stellar mass of the host galaxy, just ~500 million years after the Big Bang, it is probably necessary to assume that they originated from heavy seeds. In an ekpyrotic universe, a hot Big Bang occurs as a result of the collision of two branes. Quantum fluctuations create ripples on the brane surfaces, leading to spatial variations in the timing of collisions, thereby creating density perturbations that can facilitate the formation of massive black hole seeds. I hypothesize that perhaps Rayleigh-Bénard-Marangoni type convection in the extra dimension is a more efficient source of macroscopic density perturbations than quantum fluctuations.

References in corpus (9)

• Challenges for $\Lambda$CDM: An update
• Viscous Cosmology for Early- and Late-Time Universe
• Observational Evidence for Primordial Black Holes: A Positivist Perspective
• Comparison between two and three dimensional Rayleigh-Bénard convection
• Relativistic fluid dynamics: physics for many different scales
• Alleviating the need for exponential evolution of JWST galaxies in 10${}^{10}{M}_{\odot }$ haloes at $z>10$ by a modified $\Lambda$CDM power spectrum
• Excess of high-$z$ galaxies as a test for bumpy power spectrum of density perturbations
• String theory, Einstein, and the identity of physics: Theory assessment in absence of the empirical
• Search for a possible quasi-periodic structure based on data of the SDSS DR12 LOWZ