Results 51 to 60 of about 2,875,148 (209)
The internal structure of Cold Dark Matter Haloes [PDF]
, 2010 Currently favoured cosmological models for structure formation of the Universe assume that a large fraction of the mass of the Universe is 'dark'. The evidence for dark matter comes from observations of its gravitational influence.
Vogelsberger, M., Vogelsberger, Mark P.
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SciPost Physics ReviewsWe review observational, experimental and theoretical results related to Dark Matter.
Marco Cirelli +2 more
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International Journal of Modern Physics A, 1994 The hypothesis of an 'invisible' axion was made by Misha Shifman and others, approximately thirty years ago. It has turned out to be an unusually fruitful idea, crossing boundaries between particle physics, astrophysics and cosmology. An axion with mass of order 10-5 eV (with large uncertainties) is one of the leading candidates for the dark matter of
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Constrains on the electric charges of the binary black holes with GWTC-1 events
European Physical Journal C: Particles and Fields, 2021 Testing black hole’s charged property is a fascinating topic in modified gravity and black hole astrophysics. In the first Gravitational-Wave Transient Catalog (GWTC-1), ten binary black hole merger events have been formally reported, and these ...
Hai-Tang Wang +5 more
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International Journal of Modern Physics A, 2006 More than 90% of matter in the Universe could be composed of heavy particles, which were non-relativistic, or 'cold', when they froze-out from the primordial soup. I will review current searches for these hypothetical particles, both via interactions with nuclei in deep underground detectors, and via the observation of their annihilation products in ...
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Fuzzy Dark Matter and Dark Matter Halo Cores [PDF]
The Astrophysical Journal, 2020 Abstract Whereas cold dark matter (CDM) simulations predict central dark matter cusps with densities that diverge as ρ(r) ∼ 1/r, observations often indicate constant-density cores with finite central densities ρ 0 and a flat density distribution within a core radius r 0.
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BRANEWORLDS AND DARK MATTER [PDF]
International Journal of Modern Physics D, 2011 Two problems related to dark matter are considered in the context of a braneworld model in which the confinement of gauge fields on the brane is achieved by invoking a confining potential. First, we show that the virial mass discrepancy can be addressed if the conserved geometrical term appearing in this model is considered as an energy–momentum ...
Shahidi, Shahab, Sepangi, Hamid Reza
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Unified Dark Matter scalar field models with fast transition [PDF]
, 2011 We investigate the general properties of Unified Dark Matter (UDM) scalar field models with Lagrangians with a non-canonical kinetic term, looking specifically for models that can produce a fast transition between an early Einstein-de Sitter CDM-like era
Bertacca, Daniele +9 more
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An Investigation of the Loop Oscillations after a Solar Flare
UniverseWe study the loop oscillations after a solar flare on 19 January 2023, in the active region N11E40 3196, which is well observed by the SDO/AIA. After tracing the loop position and fitting, we find that the loop oscillations have a period between 3 and 9 ...
Jun Xu +5 more
doaj +1 more source
Physical Review D, 1992 A very weakly coupled scalar field with mass $m$ and initial vacuum expectation value $V$ will provide enough mass to close the universe provided $V\simeq (3\times 10^8\gev)(100\gev/m)^{1/4}$. We discuss possible models in which such a field could arise.
Rangarajan, R., Srednicki, M.
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