Stellar signatures of inhomogeneous big bang nucleosynthesis

@article{Arbey2020StellarSO,
  title={Stellar signatures of inhomogeneous big bang nucleosynthesis},
  author={Alexandre Arbey and J{\'e}r{\'e}my Auffinger and Joseph I. Silk},
  journal={Physical Review D},
  year={2020},
  volume={102},
  pages={023503}
}
We evaluate abundance anomalies generated in patches of the Universe where the baryon-to-photon ratio was locally enhanced by possibly many orders of magnitude in the range η=10-10–10-1. Our study is motivated by the possible survival of rare dense regions in the early Universe, the most extreme of which, above a critical threshold, collapsed to form primordial black holes. If this occurred, one may expect there to also be a significant population of early-forming stars that formed in similar… 

Figures from this paper

Sensitivity forecasts for the cosmological recombination radiation in the presence of foregrounds
The cosmological recombination radiation (CRR) is one of the inevitable $\Lambda$CDM spectral distortions of the cosmic microwave background (CMB). While it shows a rich spectral structure across
Implications of stochastic effects for primordial black hole production in ultra-slow-roll inflation
We study the impact of stochastic noise on the generation of primordial black hole (PBH) seeds in ultra-slow-roll (USR) inflation with numerical simulations. We consider the non-linearity of the
X-ray signature of antistars in the Galaxy
The existence of macroscopic objects from antimatter (antistars) is envisaged in some models of baryogenesis. Searches for antistars have been usually carried out in gamma-rays originated from
Decay of baryon inhomogeneities in an expanding universe
Baryon inhomogeneities are generated early in the universe. These inhomogeneities affect the phase transition dynamics of subsequent phase transitions, they also affect the nucleosynthesis

References

SHOWING 1-10 OF 90 REFERENCES
Affleck-Dine Baryogenesis and Heavy Element Production from Inhomogeneous Big Bang Nucleosynthesis
Recent observations have revealed that small-scale structure exists at high redshift. We study the possibility of the formation of such structure during baryogenesis and big bang nucleosynthesis. It
Abundance Variations within Globular Clusters
▪ Abstract Abundance variations within globular clusters (GCs), and of GC stars with respect to field stars, are important diagnostics of a variety of physical phenomena, related to the evolution of
Baryon isocurvature fluctuations at small scales and baryonic dark matter.
  • Dolgov, Silk
  • Physics
    Physical review. D, Particles and fields
  • 1993
A model of baryogenesis is described which gives rise to fluctuations in baryon number that are large on small scales but of low amplitude on large scales. This provides a mechanism for primordial
Constraining density fluctuations with big bang nucleosynthesis in the era of precision cosmology
We reexamine big bang nucleosynthesis with large-scale baryon density inhomogeneities when the length scale of the density fluctuations exceeds the neutron diffusion length ($\sim 10^7-10^8$ cm at
Cosmological quantum chromodynamics, neutron diffusion, and the production of primordial heavy elements
A simple one-dimensional model is used to describe the evolution of neutron density before and during nucleosynthesis in a high-entropy bubble left over from the cosmic quark-hadron phase transition.
Complete element abundances of nine stars in the r-process galaxy Reticulum II
We present chemical abundances derived from high-resolution Magellan/Magellan Inamori Kyocera Echelle spectra of the nine brightest known red giant members of the ultra-faint dwarf galaxy Reticulum
Neutron Star Mergers Might Not Be the Only Source of r-process Elements in the Milky Way
Probing the origin of r-process elements in the universe represents a multidisciplinary challenge. We review the observational evidence that probes the properties of r-process sites, and address them
Solving puzzles of GW150914 by primordial black holes
The black hole binary properties inferred from the LIGO gravitational wave signal GW150914 posed several serious problems. The high masses and low effective spin of black hole binary can be explained
Stochastic gravitational waves associated with the formation of primordial black holes
Primordial black hole (PBH) mergers have been proposed as an explanation for the gravitational wave events detected by the LIGO collaboration. Such PBHs may be formed in the early Universe as a
...
...