A theory of dark matter which was promising up to the late 1990s.
"Mixed" dark matter is also called Hot + Cold Dark Matter. Hot Dark matter has only one known form - neutrinos, although other forms are speculated to exist. Cosmologically important dark matter is now believed to be pure Cold Dark Matter. However, in the early 1990s the power spectrum of fluctuations in the galaxy clustering did not agree entirely with the predictions for a standard cosmology built around pure Cold Dark Matter. Mixed Dark Matter with a composition of about 80% cold and 20% hot (neutrinos) was investigated and found to agree better with observations. This model was made obsolete by the discovery in 1998 of the acceleration of universal expansion, which eventually led to the Dark Energy + Dark Matter paradigm of this decade.
Famous quotes containing the words mixed, dark and/or matter:
“But oh, not the hills of Habersham,
And oh, not the valleys of Hall
Avail: I am fain for to water the plain.
Downward, the voices of Duty call—
Downward, to toil and be mixed with the main,
The dry fields burn, and the mills are to turn,
And a myriad flowers mortally yearn,
And the lordly main from beyond the plain
Calls o’er the hills of Habersham,
Calls through the valleys of Hall.”
—Sidney Lanier (1842–1881)
“‘Who is it that this dark night
Underneath my window plaineth?’”
—Sir Philip Sidney (1554–1586)
“Eclecticism is the degree zero of contemporary general culture: one listens to reggae, watches a western, eats McDonald’s food for lunch and local cuisine for dinner, wears Paris perfume in Tokyo and “retro” clothes in Hong Kong; knowledge is a matter for TV games. It is easy to find a public for eclectic works.”
—Jean François Lyotard (b. 1924)