The distinguishability of interacting dark energy from modified gravity

Timothy Clemson, Kazuya Koyama

Research output: Contribution to journalArticlepeer-review


We study the observational viability of coupled quintessence models with their expansion and growth histories matched to modified gravity cosmologies. We find that for a Dvali-Gabadadze-Porrati model which has been fitted to observations, the matched interacting dark energy models are observationally disfavoured. We also study the distinguishability of interacting dark energy models matched to scalar-tensor theory cosmologies and show that it is not always possible to find a physical interacting dark energy model which shares their expansion and growth histories.
Original languageEnglish
Article number010
Pages (from-to)010
JournalJournal of Cosmology and Astroparticle Physics
Issue number1
Early online date8 Jan 2013
Publication statusPublished - Jan 2013


  • modified gravity
  • dark energy theory


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