Results 31 to 40 of about 22,632 (204)
Advances in High Energy Physics, Volume 2022, Issue 1, 2022., 2022 In this paper, we have investigated the density perturbations and cosmological evolution in the FLRW universe in the presence of a cosmic magnetic field, which may be assumed to mimic primordial magnetic fields. Such magnetic fields have sufficient strength to influence galaxy formation and cluster dynamics, thereby leaving an imprint on the CMB ...
Samarjit Chakraborty +2 more
wiley +1 more source
The long-standing connection of BBN and Indirect measurements: The 3He(n,p)3H reaction at Big Bang energies [PDF]
EPJ Web of Conferences, 2023 Nuclear reactions play a key role in the framework of the Big Bang Nucleosynthesis. A network of 12 principal reactions has been identified as the main path which drives the elemental nucleosynthesis in the first twenty minutes of the history of the ...
Pizzone R.G., Spampinato C.
doaj +1 more source
Updating constraints on f(T) teleparallel cosmology and the consistency with big bang nucleosynthesis [PDF]
, 2020 We focus on viable f(T) teleparallel cosmological models, namely power law, exponential and square-root exponential, carrying out a detailed study of their evolution at all scales.
M. Benetti, S. Capozziello, G. Lambiase
semanticscholar +1 more source
New worlds, new chemistry, new ceramics
International Journal of Ceramic Engineering &Science, Volume 3, Issue 6, Page 252-266, November 2021., 2021 Space missions have documented the chemical diversity and complexity of planets and moons in our own solar system. Astronomers have found thousands of exoplanets orbiting other stars in our galaxy, whose diversity implies immense chemical, ceramic, geological, and mineralogical complexity.
Alexandra Navrotsky, Megan Householder
wiley +1 more source
Constraints on primordial black holes from big bang nucleosynthesis revisited [PDF]
Physical Review D, 2020 As space expands, the energy density in black holes increases relative to that of radiation, providing us with motivation to consider scenarios in which the early universe contained a significant abundance of such objects.
Celeste S. Keith +3 more
semanticscholar +1 more source
Laboratory exploration of mineral precipitates from Europa's subsurface ocean
Journal of Applied Crystallography, Volume 54, Issue 5, Page 1455-1479, October 2021., 2021 Precipitation experiments from a model Europan ocean solution subjected to fast and slow freezing suggest that the highly hydrated Na–Mg sulfate phase Na2Mg(SO4)2·16H2O is one of the lowest‐temperature mineral phases likely to be stable on Europa's surface and may therefore be astrobiologically significant.The precipitation of hydrated phases from a ...
Stephen P. Thompson +5 more
wiley +1 more source
Big Bang Nucleosynthesis hunts chameleon dark matter
Journal of High Energy Physics, 2020 We study the chameleon field dark matter, dubbed scalaron, in F (R) gravity in the Big Bang Nucleosynthesis (BBN) epoch. With an R 2-correction term required to solve the singularity problem for F (R) gravity, we first find that the scalaron dynamics is ...
Hua Chen +3 more
doaj +1 more source
Constraints on bimetric gravity from Big Bang nucleosynthesis
Journal of Cosmology and Astroparticle Physics, 2021 Bimetric gravity is a ghost-free and observationally viable extension of general relativity, exhibiting both a massless and a massive graviton. The observed abundances of light elements can be used to constrain the expansion history of the Universe at ...
Marcus Högås, E. Mörtsell
semanticscholar +1 more source
Big-bang nucleosynthesis with sub-GeV massive decaying particles [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 We consider the effects of the injections of energetic photon and electron (or positron) on the big-bang nucleosynthesis. We study the photodissociation of light elements in the early Universe paying particular attention to the case that the injection ...
M. Kawasaki +4 more
semanticscholar +1 more source
Big bang nucleosynthesis and entropy evolution in f(R, T) gravity [PDF]
The European Physical Journal Plus, 2020 The present article is devoted to constraining the model parameter χ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek ...
S. Bhattacharjee, P. Sahoo
semanticscholar +1 more source