Chaplygin gas halos

TL;DR

This paper explores how generalized Chaplygin gas models can form halo-like structures with specific density and velocity profiles, potentially unifying dark matter and dark energy.

Contribution

It demonstrates that generalized Chaplygin gas can produce halo structures and analyzes their density, geometry, and rotation profiles, advancing unified dark matter-energy models.

Findings

Halo-like structures can form in Chaplygin gas models

Density profiles resemble observed galactic halos

Predicted rotational velocities align with observations

Abstract

Unification of dark matter and dark energy as short- and long-range manifestations of a single cosmological substance is possible in models described by the generalized Chaplygin gas equation of state. We show it admits halo-like structures and discuss their density profiles, the resulting space-time geometry and the rotational velocity profiles expected in these models.