Evanescent Matter

Abstract

The LCDM cosmology offers a picture for galaxy formation that is broadly promising but difficult to reconcile with the evidence that environment has had strikingly little effect on the evolution of ellipticals and pure disk spiral galaxies. Reconciliation might be aided by adding to LCDM an evanescent component of matter with evolving mass and a fifth force large enough to aid early assembly of more nearly isolated protogalaxies. I present a simple illustration.

At the referees' request I have enlarged the discussion of the phenomenological motivation for the model and the explanation of the physics. The model and the illustrations if its effects on structure formation are unchanged (apart from correction of a typo in the label Figure 4)

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Cited by in corpus (2)

• Dark matter solution to the $H_0$ and $S_8$ tensions, and the integrated Sachs-Wolfe void anomaly
• Hubble tension as a window on the gravitation of the dark matter sector: Exploration of a family of models