overdense

With a cosmological constant, for instance, the potential becomes shallower as the light traverses it, so the blueshifting as it goes in outpaces the redshifting as it comes out, making for a small blueshifting of the light as it passes through overdense regions, and a small redshifting as it passes through underdense regions.

A Dark, Misleading Force

A related problem can arise if your theory contains long-lived particles that are too light, because if there are too many of them around when structure is trying to form, then because they are light they typically move at relativistic speeds and stream through overdense regions smoothing them out and ruining structure formation.

Constraints and Signatures in Particle Cosmology

Photons, just like normal matter, produce positive curvature in overdense regions.

Dark Matter: Still Existing

The idea here is that as structure forms, your overdense regions become smaller, while your underdense regions become larger.

Dark Matter: Still Existing

When matter grows overdense in the universe below us, it explodes into ours.

The Urth of the New Sun

Let matter become overdense here, and it bursts into the higher.

The Urth of the New Sun

The stars form from little knots of overdense regions in the cloud.

Discover Blogs

Actually this means there isn’t the right balance between strong flour and water, which leads to a heavy, overdense loaf.

Wheat Petite « We Don't Count Your Own Visits To Your Blog

During the photons’ journey across the universe (ultimately to our detectors) they pass through overdense regions of matter that are in the process of becoming more dense, due to the attractive nature of gravity.

Evolving Potentials