The ΛCDM (Lambda cold dark matter) or Lambda-CDM model is a parametrization of the Big Bangcosmological model in which the universe contains a cosmological constant, denoted by Lambda (GreekΛ), associated with dark energy, and cold dark matter (abbreviated CDM). It is frequently referred to as the standard model of Big Bangcosmology, because it is the simplest model that provides a reasonably good account of the following properties of the cosmos:
The model assumes that general relativity is the correct theory of gravity on cosmological scales.
It emerged in the late 1990s as a concordance cosmology, after a period of time when disparate observed properties of the universe appeared mutually inconsistent, and there was no consensus on the makeup of the energy density of the universe.
"In the standard cosmological model, the lambda-CDM, dark energy is typically regarded as a vacuum energy that does not evolve over time, with its equation of state remaining constant at -1," said ...
ADVERTISEMENT. The standard model of cosmology – the best working theory we have to explain the universe – is known as ΛCDM (pronounced Lambda-CDM). Lambda is the symbol for the cosmological constant and CDM stands for cold dark matter ... ADVERTISEMENT ... .
