Dark matter

mysterious non-luminous matter (and/or radiation) comprising most of the matter in our observable universe

A neutrino ( ; denoted by the Greek letter Nu (letter)|) is an elementary particle that interacts via the weak interaction and gravity. The neutrino is so named because it is electrically neutral and because its rest mass is so small (-ino) that it was long thought to be zero. The rest mass of the neutrino is much smaller than that of the other known elementary particles (excluding massless particles).

American astronomer and physicist (1928-2016)

model of big-bang cosmology involving a FLRW spacetime with positive cosmological constant and cold dark matter

An axion () is a hypothetical elementary particle originally theorized in 1978 independently by Frank Wilczek and Steven Weinberg as the Goldstone boson of Peccei–Quinn theory, which had been proposed in 1977 to solve the strong CP problem in quantum chromodynamics (QCD). If axions exist and have low mass within a specific range, they are of interest as a possible component of cold dark matter.

ESA space telescope aimed at mapping the distribution of dark matter

hypothetical type of black hole that formed soon after the Big Bang

hypothesized galaxy consisting mainly of dark matter with no, or very few, stars

alternative explanation of the non-Newtonian rotation of galaxies

In supersymmetry, the neutralino is a hypothetical particle. In the Minimal Supersymmetric Standard Model (MSSM), a popular model of realization of supersymmetry at a low energy, there are four neutralinos that are fermions and are electrically neutral, the lightest of which is stable in an R-parity conserved scenario of MSSM. They are typically labeled (the lightest), , and (the heaviest) although sometimes \tilde{\chi}_1^0, \ldots, \tilde{\chi}_4^0 is also used when \tilde{\chi}_i^\pm is used to refer to charginos.

dark matter that moves slowly compared to the speed of light and interacts very weakly with ordinary matter and electromagnetic radiation

dark matter candidate

hypothetical neutral right-handed lepton that interacts only via gravity and not via any of the other fundamental interactions of the Standard Model

hypothetical astronomical object heated by dark-matter annihilation

two colliding clusters of galaxies in constellation Carina

astronomical body that might explain the apparent presence of dark matter in galaxy halos

theoretical component of a galaxy that envelops the galactic disc and extends well beyond the edge of the visible galaxy

dark matter consisting of particles that travel with ultrarelativistic velocities

The axino is a hypothetical elementary particle predicted by some theories of particle physics. Peccei–Quinn theory attempts to explain the observed phenomenon known as the strong CP problem by introducing a hypothetical real scalar particle called the axion. Adding supersymmetry to the model predicts the existence of a fermionic superpartner for the axion, the axino, and a bosonic superpartner, the saxion. They are all bundled up in a chiral superfield.

reconciliation between dark energy and dark matter

hypothesized form of dark matter that has properties intermediate between those of hot dark matter and cold dark matter

theoretical elementary particle

hypothetical subatomic particle as the cause of anomalous measurement results near 17 MeV

Chinese scientific satellite

extremely low luminosity galaxy

galaxy cluster

dark matter composed of baryons

the fact that the number of observed dwarf galaxies is orders of magnitude lower than expected from numerical cosmological simulations

hypothetical counterpart to ordinary matter

discrepancy between flat central dark matter density profiles inferred by observation and density profiles predicted by cosmological simulations with density increasing steeply at small radii

mathematical function that describes how the density of a spherical stellar system varies with distance

object composed of dark energy that outwardly resembles a black hole

generic name given to the lightest of the additional hypothetical particles found in supersymmetric models

2021 American film directed by Cecilia Aranovich

postulated type of radiation that mediates interactions of dark matter

commonly used model profile for dark matter halos

hypothetical form of dark matter consisting of particles with strong self-interactions

galaxy cluster in the constellation Eridanus

hypothetical particles that interact strongly with ordinary matter, but could form the inferred dark matter despite this

Candidate Dark Galaxy 2 (CDG-2) is a candidate for a dark galaxy, composed predominantly of dark matter, along with four globular clusters, in the Perseus cluster. It'd be one of the most dark matter dominated galaxies probably detected, estimated to be between 99.94% and 99.98% dark matter. It has been not confirmed yet if it's a true dark galaxy, more studies are required for a definitive conclusion.

2015 Japanese space observatory

type of globular star clusters with an unusually high mass for the number of stars within it, populated by objects with significant dark matter components, such as central massive black holes

dark matter weakly interacting massive particles candidates with masses less than 1 GeV