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The Lambda-CDM, Lambda cold dark matter, or ΛCDM model is a mathematical model of the Big Bang theory with three major components: a cosmological constant, denoted by lambda (Λ), associated with dark energy; the postulated cold dark matter, denoted by CDM; ordinary matter
Apr 28, 2016 · On the other hand, $\Lambda{\rm CDM}$ model is a particular state-of-the-art version of The Big Bang Theory that includes the "beginning from the explosion" but also describes the presence of the visible baryonic matter (mostly stars and galaxies) as well as the invisible dark matter, DM.
Apr 16, 2019 · The CDM model is based on the interpretation that the observed redshift z of distant galaxies is a result of the expansion of space. Extrapolating backwards in time gives the prediction that the universe expanded from an extremely dense and hot state, the Big Bang, about 13.80 Gyr ago.
- Dark Matter
- Dark Energy
- Inflation
The evidence for non-baryonic dark matter began to develop in the 1980s with the emerging gap between the baryon density determined by BBN (\(\varOmega _B \le 0.1\)) and the total matter density determined by a variety of astrophysical methods (\(\varOmega _M \ge 0.2\)). Today, there is an airtight case based upon the 50\(\sigma \) discrepancy betw...
The history of dark energy and cosmic acceleration is more recent, but its roots in the form of \(\Lambda \) go back to deSitter, Einstein, Lemaitre and Eddington and the beginning of cosmology. \(\Lambda \) was invoked again by Bondi, Hoyle and Gold in their steady state cosmology in 1948 and in the 1960s to explain the great abundance of QSOs at ...
Inflation is the most important idea in cosmology since the big bang itself. It offers a compelling explanation for the origin of the smoothness of the Universe as well as the small inhomogeneities that seed cosmic structure, and with particle dark matter, it has given us the highly successful CDM paradigm for structure formation. There is evidence...
- Michael S. Turner
- mturner@uchicago.edu
- 2018
Big-bang model, widely held theory of the evolution of the universe. Its essential feature is the emergence of the universe from a state of extremely high temperature and density—the so-called big bang that occurred 13.8 billion years ago. Learn more about the big-bang model in this article.
- The Editors of Encyclopaedia Britannica
Study of the large-scale structure of the universe then indicates the existence of dark matter and a nonzero cosmological constant. This model, known as the ΛCDM model, is the standard model of contemporary cosmology.
ΛCDM Model of Cosmology. We illustrate a brief and simplified picture of theorized stages in the evolution of the universe, to provide a context for discussing ΛCDM parameters. In this picture, the infant universe is an extremely hot, dense, nearly homogeneous mixture of photons and matter, tightly coupled together as a plasma.
