Exact solutions for the interacting tachyonic-dark matter system

Ramón Herrera, Diego Pavón, Winfried Zimdahl

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


We find exact solutions leading to power law accelerated expansion for a homogeneous, isotropic and spatially flat universe, dominated by an interacting mixture of cold dark matter and a tachyonic field such that the ratio of the energy densities of both components at late times is constant and no coincidence problem arises.

Original languageEnglish
Pages (from-to)2161-2169
Number of pages9
JournalGeneral Relativity and Gravitation
Issue number9
StatePublished - Sep 2004


  • Coincidence problem
  • Dark energy
  • Mathematical cosmology
  • Tachyon field


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