Interacting Chaplygin gas

2005/09/30 by Hongsheng Zhang, Zong-Hong Zhu, Zong‐Hong Zhu · 1 citation
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Bubble #Chaplygin gas #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Dark energy #Deceleration parameter #Equation of state #Friedmann–Lemaître–Robertson–Walker metric #Galaxies: Formation, Evolution, Phenomena #General relativity #Geometry #Mathematical physics #Mathematics #Mechanics #Metric (unit) #Physics #Quantum mechanics #Scaling #Theoretical physics #Universe #astro-ph #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.73.043518

published as Phys.Rev.D73:043518,2006 · 7 pages, 6 figures, detailed discussions on the interaction term added

openalex publication_date 2006/02/23 · arxiv created 2006/02/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We investigate a kind of interacting Chaplygin gas model in which the Chaplygin gas plays the role of dark energy and interacts with cold dark matter particles. We find that there exists a stable scaling solution at late times with the Universe evolving into a phase of steady state. Furthermore, the effective equation of state of Chaplygin gas may cross the so-called phantom divide w=\ensuremath-1. The above results are derived from continuity equations, which means that they are independent of any gravity theories. Assuming standard general relativity and a spatially flat Friedamnn-Robertson-Walker (FRW) metric, we also find the deceleration parameter is well consistent with current observations.

Citations

• Generalized Chaplygin gas and cosmic microwave background radiation constraints
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Cited by

• Interacting Chaplygin gas revisited