Results 21 to 30 of about 164,168 (293)
Primordial black hole sterile neutrinogenesis: sterile neutrino dark matter production independent of couplings [PDF]
Journal of Cosmology and Astroparticle Physics, 2023 Sterile neutrinos (ν s s) are well-motivated and actively searched for hypothetical neutral particles that would mix with the Standard Model active neutrinos. They are considered prime warm dark matter (DM) candidates, typically when their mass is in the
Muping Chen +3 more
semanticscholar +1 more source
Warm-plus-hot neutrino dark matter [PDF]
Physical Review D, 1995 We investigate a new hybrid-model universe containing two types of dark matter, one ``warm'' and the other ``hot.'' The hot component is an ordinary light neutrino with mass \ensuremath{\sim}25${\mathit{h}}^{2}$ eV while the warm component is a sterile neutrino with mass \ensuremath{\sim}700${\mathit{h}}^{2}$ eV.
, Malaney, , Starkman, , Widrow
openaire +2 more sources
Constraints on dark matter self-interaction from the internal density profiles of X-COP galaxy clusters [PDF]
Astronomy & Astrophysics, 2022 TThe fundamental properties of the postulated dark matter (DM) affect the internal structure of gravitationally-bound structures. In the cold dark matter paradigm, DM particles interact only via gravity.
D. Eckert +6 more
semanticscholar +1 more source
Physical Review D, 2020 Decay of the inflaton or moduli which dominated the energy density of the universe at early times leads to a matter to radiation transition epoch. We consider non-thermal sterile dark matter particles produced as decay product during such transitions ...
S. Bhattacharya +5 more
semanticscholar +1 more source
Anisotropic cosmic optical background bound for decaying dark matter in light of the LORRI anomaly [PDF]
, 2022 Recently anomalous flux in the cosmic optical background (COB) is reported by the New Horizon observations. The COB flux is 16 . 37 ± 1 . 47 nWm − 2 sr − 1 , at the LORRI pivot wavelength of 0 . 608 µ m, which is ∼ 4 σ level above the expected flux from the
K. Nakayama, W. Yin
semanticscholar +1 more source
Shining light on the scotogenic model: interplay of colliders and cosmology
Journal of High Energy Physics, 2020 In the framework of the scotogenic model, which features radiative generation of neutrino masses, we explore light dark matter scenario. Throughout the paper we chiefly focus on keV-scale dark matter which can be produced either via freeze-in through the
Sven Baumholzer +3 more
doaj +1 more source
Beyond freeze-in: Dark matter via inverse phase transition and gravitational wave signal [PDF]
Physical Review D, 2021 We propose a novel scenario of Dark Matter production naturally connected with generation of gravitational waves. Dark Matter is modelled as a real scalar, which interacts with the hot primordial plasma through a portal coupling to another scalar field ...
S. Ramazanov +3 more
semanticscholar +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
Relative distribution of dark matter, gas, and stars around cosmic filaments in the IllustrisTNG simulation [PDF]
Astronomy & Astrophysics, 2021 We present a comprehensive study of the distribution of matter around di ff erent populations of large-scale cosmic filaments, using the IllustrisTNG simulation at z = 0. We computed the dark matter (DM), gas, and stellar radial density profiles of filaments,
Daniela Gal'arraga-Espinosa +2 more
semanticscholar +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