2025/04/07 by Manuel Gonzalez-Espinoza, Gonzalez-Espinoza, Manuel, Ramón Herrera +1
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Pulsars and Gravitational Waves Research
paper · pdf · doi:10.48550/arxiv.2504.05435
openalex publication_date 2025/04/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper, we examine the cosmological evolution of a dilatonic ghost condensate field responsible for dark energy, which interacts with dark matter through a source term. We explore three different interaction models to describe the present universe. For each interaction model, we perform a detailed phase-space analysis, obtaining the stability conditions, and identifying the critical points. Furthermore, we compare our interaction models with the most recent Hubble parameter and supernova Ia data as functions of redshift. Additionally, we investigate the conditions for scaling regimes in these models and analyze the successful transition toward an attractor point to characterize the behavior of dark matter.