Cold dark matter (CDM) as a research area encompasses theoretical, computational, and observational studies of non-relativistic, weakly interacting matter that dominates the matter density of the Universe and seeds structure formation. Research focuses on modeling CDM’s impact on cosmic microwave background anisotropies, large-scale structure, galaxy and cluster halos, and substructure through N-body simulations and analytic frameworks such as linear perturbation theory and halo models. It also investigates constraints from gravitational lensing, galaxy dynamics, and cosmological surveys, and explores candidate particle properties via indirect astrophysical signatures and their consistency with precision cosmology and alternative dark matter scenarios.
The nature of dark matter has been a hotly debated topic for decades. If it's a heavy, slow moving particle, then it's just possible that neutrinos may be emitted during interactions with normal matter.
Astronomy
Dec 9, 2024
0
70
An interdisciplinary collaboration between condensed-matter, quantum-optics and particle physicists has the potential to crack the search for low-mass dark matter. The proposed quantum detector builds on EQUS studies of elementary ...
General Physics
Dec 6, 2024
0
130
After almost a century of speculation, proposals and searches for dark matter, physicists now know that it currently comprises about 27% of the universe's mass-energy, with an abundance over five times that of ordinary matter ...
Gravity has shaped our cosmos. Its attractive influence turned tiny differences in the amount of matter present in the early universe into the sprawling strands of galaxies we see today. A new study using data from the Dark ...
Astronomy
Nov 19, 2024
1
153
Recent research by a student-faculty team at Colgate University unlocks new clues that could radically change the world's understanding of the origin of dark matter.
Astronomy
Nov 18, 2024
3
201
As if searching for dark matter isn't difficult enough already, physicists may have detected another hurdle known as a "neutrino fog" from solar neutrinos streaming through Earth.
The standard model for how galaxies formed in the early universe predicted that the James Webb Space Telescope (JWST) would see dim signals from small, primitive galaxies. But data are not confirming the popular hypothesis ...
Astronomy
Nov 12, 2024
10
291
A team of physicists from the universities of Amsterdam, Princeton and Oxford have shown that extremely light particles known as axions may occur in large clouds around neutron stars. These axions could form an explanation ...
Astronomy
Oct 18, 2024
13
395
While various studies have hinted at the existence of dark matter, its nature, composition and underlying physics remain poorly understood.
The reason we call dark matter dark isn't that it's some shadowy material. It's because dark matter doesn't interact with light. The difference is subtle, but important. Regular matter can be dark because it absorbs light. ...
Astronomy
Sep 26, 2024
1
144
