Results 51 to 60 of about 701,414 (343)
The Epoch of Reionization in Warm Dark Matter Scenarios [PDF]
Universe, 2021 In this paper we investigate how the Reionization process is affected by early galaxy formation in different cosmological scenarios. We use a semi-analytic model with suppressed initial power spectra to obtain the UV Luminosity Function in thermal Warm ...
M. Romanello, N. Menci, M. Castellano
semanticscholar +1 more source
European Physical Journal C: Particles and Fields, 2023 A view is taken up whereby the non-singular Trautman–Kopczyński big-bang creation of the Universe produced a highly torsional hot state at early stages of the cosmic evolution which particularly brought about the formation of a dark matter cloud.
J. G. Cardoso
doaj +1 more source
Doublet-Singlet Oscillations and Dark Matter Neutrinos [PDF]
, 1996 We examine the `singlet majoron model' first introduced by Chikashige, Mohapatra and Peccei as a simple extension of the standard model with massive Majorana neutrinos.
Okada, Nobuchika
core +2 more sources
Cosmological axion and neutrino mass constraints from Planck 2015 temperature and polarization data
Physics Letters B, 2016 Axions currently provide the most compelling solution to the strong CP problem. These particles may be copiously produced in the early universe, including via thermal processes.
Eleonora Di Valentino +5 more
doaj +1 more source
Expanding Culturomics from Gut to Extreme Environmental Settings
mSystems, 2021 With the advent of metagenomics, a quest began to identify the dynamics of the microbial communities in different ecological niches. Altogether, this has resulted in identification of microorganisms but is limited to only a small number of phylogenetic ...
Utkarsh Sood, Roshan Kumar, Princy Hira
doaj +1 more source
Too hot to handle? Analytic solutions for massive neutrino or warm dark matter cosmologies [PDF]
, 2017 Author(s): Slepian, Z; Portillo, SKN | Abstract: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. We obtain novel closed-form solutions to the Friedmann equation for cosmological models containing a ...
Z. Slepian, S. Portillo
semanticscholar +1 more source
Hot Dark Matter in Cosmology [PDF]
, 2001 22 pages, including four postscript figures; to appear in D. O.
Primack, Joel R., Gross, Michael A. K.
openaire +2 more sources
Cosmological Simulation for Fuzzy Dark Matter Model
Frontiers in Astronomy and Space Sciences, 2019 Fuzzy Dark Matter (FDM), motivated by string theory, has recently become a hot candidate for dark matter. The rest mass of FDM is believed to be ~10−22eV and the corresponding de-Broglie wave length is ~1kpc. Therefore, the quantum effect of FDM plays an
Jiajun Zhang, Hantao Liu, Ming-Chung Chu
doaj +1 more source
The Open Journal of Astrophysics, 2021 We apply the squeezed state formalism to scalar field dark matter (e.g. axion) perturbations generated during inflation. As for the inflationary perturbations, the scalar field state becomes highly squeezed as modes exit the horizon. For as long as $H>m_\
Jondalar L. J. Kuß, David J. E. Marsh
doaj +1 more source
, 2008 Caustics are a generic feature of the nonlinear growth of structure in the dark matter distribution. If the dark matter were absolutely cold, its mass density would diverge at caustics, and the integrated annihilation probability would also diverge for ...
Alard +23 more
core +1 more source