Results 51 to 60 of about 689,866 (345)
Light Dark Matter from Entropy Dilution
Journal of High Energy Physics, 2020 We show that a thermal relic which decouples from the standard model (SM) plasma while relativistic can be a viable dark matter (DM) candidate, if the decoupling is followed by a period of entropy dilution that heats up the SM, but not the dark sector ...
Jared A. Evans +4 more
doaj +1 more source
The maximum accretion rate of hot gas in dark matter haloes [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We revisit the question of ‘hot mode’ versus ‘cold mode’ accretion on to galaxies using steady-state cooling flow solutions and idealized 3D hydrodynamic simulations. We demonstrate that for the hot accretion mode to exist, the cooling time is required
J. Stern +3 more
semanticscholar +1 more source
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
Cosmological N-body simulations with generic hot dark matter [PDF]
, 2017 We have calculated the non-linear effects of generic fermionic and bosonic hot dark matter components in cosmological N-body simulations. For sub-eV masses, the non-linear power spectrum suppression caused by thermal free-streaming resembles the one seen
Jacob Brandbyge, S. Hannestad
semanticscholar +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
Majorana neutrinos as the dark matters in the cold plus hot dark matter model [PDF]
Physics Letters B, 1996 A simple model of the Majorana neutrino with the see-saw mechanism is studied, assuming that two light neutrinos are the hot dark matters with equal mass of 2.4 eV in the cold plus hot dark matter model of cosmology. We find that the heavy neutrino, which is the see-saw partner with the remaining one light neutrino, can be the cold dark matter, if the ...
Shin Sasaki +2 more
openaire +3 more sources
, 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