critical density


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critical density

n
(Astronomy) the density of matter that would be required to halt the expansion of the universe

critical density

The amount of matter and energy in the universe which if exceeded will delay and even reverse the universe’s expansion.
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References in periodicals archive ?
Then in order to find new correlations we shall rely on a) the geometry of existing EFE solutions, and b) one coincidence which is critical density.
This star appropriates matter from its companion, eventually accumulating too much matter, with its core reaching a critical density of two billion grams per cubic centimeter, at which point an uncontrolled fusion of carbon and oxygen causes the star to explode.
Polaritons are interacting bosons, which above a critical density may condense into a single quantum state.
In the control of traffic flow, for example, for the flow through a tunnel, it is desirable to have free-flow traffic in the tunnel where the density remains below a certain critical density that corresponds to maximal throughput in the system.
In order to address this problem and get the tighter bonds of critical density, we put the exposure-path problem into a 3D uniform lattice and propose a bond percolation-based scheme to calculate the tighter bounds of critical density.
Quorum sensing allows bacteria to change their behaviour after reaching a critical density.
Finally, we will demonstrate that there are graph classes such that there a exists a critical density co where the category to which a random graph with cn edges belongs to is different for c > [c.
Although many of the essays in this collection rehearse ideas or theoretical assumptions that we are familiar with from postcolonial and British cultural studies, by recasting these ideas and assumptions via new or different texts and contexts they expand the persuasive force and critical density of the scholarship to which they are themselves indebted.
Once they reach a critical density, they start form-sensing, and they rise up above the surface and they start forming all these complex structures.
He describes the tools necessary to discuss such orphan data as gauge coupling unification, small neutrino masses, relatively light Higgs, and a universe with a density close to the critical density.
When the material piling onto the surface of the white dwarf reaches a critical density, it sparks a thermonuclear explosion.
There was a persistent shortfall between the amount of matter we could detect and the amount needed to achieve this critical density.

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