Unmodified gravity

Fergus Simpson, Brendan Jackson, John A. Peacock

Research output: Contribution to journalArticlepeer-review


By relaxing the conventional assumption of a purely gravitational interaction between dark energy and dark matter, substantial alterations to the growth of cosmological structure can occur. In this work we focus on the homogeneous transfer of energy from a decaying form of dark energy. We present simple analytic solutions to the modified growth rates of matter fluctuations in these models, and demonstrate that neglecting physics within the dark sector may induce a significant bias in the inferred growth rate, potentially offering a false signature of modified gravity.

Original languageEnglish
Pages (from-to)1053-1058
Number of pages6
JournalMonthly Notices of the Royal Astronomical Society
Issue number2
Publication statusPublished - Feb 2011


  • cosmology: theory
  • dark energy
  • dark matter
  • large-scale structure of Universe


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