Results 41 to 50 of about 701,414 (343)
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
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
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
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
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
Axions as hot and cold dark matter [PDF]
Journal of Cosmology and Astroparticle Physics, 2014 The presence of a hot dark matter component has been hinted at 3 sigma by a combination of the results from different cosmological observations. We examine a possibility that pseudo Nambu-Goldstone bosons account for both hot and cold dark matter components.
Jeong, Kwang Sik +2 more
openaire +4 more sources
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
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