Results 41 to 50 of about 689,866 (345)
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
Massive Dark Photons as Hot Dark Matter
Acta Physica Polonica B, 2022 Motivated by the growing interest in the existence of new massive gauge bosons, we suggest that massive dark photons A0 can be a consequence of a broken new abelian symmetry U(1)'X. Such a dark symmetry U(1)'D is afterwards supposed to be associated with the conservation of the weak number W belonging to the Weakling Interacting Slim Particles U(1)'W ...
openaire +2 more sources
New interactions in the dark sector mediated by dark energy [PDF]
, 2008 Cosmological observations have revealed the existence of a dark matter sector, which is commonly assumed to be made up of one particle species only. However, this sector might be more complicated than we currently believe: there might be more than one ...
Anthony W. Brookfield +4 more
core +2 more sources
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
Astronomy, 2023 We reconstructed dark spots in the images of supermassive black holes SgrA* and M87* provided by the Event Horizon Telescope (EHT) collaboration by using the geometrically thin accretion disk model. In this model, the black hole is highlighted by the hot
Vyacheslav Ivanovich Dokuchaev
doaj +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
Forbidden frozen-in dark matter
Journal of High Energy Physics, 2019 We examine and point out the importance of a regime of dark matter pro- duction through the freeze-in mechanism that results from a large thermal correction to a decaying mediator particle mass from hot plasma in the early Universe. We show that mediator
L. Darmé +3 more
doaj +1 more source