COLA with massive neutrinos

Bill S. Wright, Hans A. Winther, Kazuya Koyama

Research output: Contribution to journalArticlepeer-review

130 Downloads (Pure)


The effect of massive neutrinos on the growth of cold dark matter perturbations acts as a scale-dependent Newton's constant and leads to scale-dependent growth factors just as we often find in models of gravity beyond General Relativity. We show how to compute growth factors for ΛCDM and general modified gravity cosmologies combined with massive neutrinos in Lagrangian perturbation theory for use in COLA and extensions thereof. We implement this together with the grid-based massive neutrino method of Brandbyge and Hannestad in MG-PICOLA and compare COLA simulations to full N-body simulations of ΛCDM and ƒ(R) gravity with massive neutrinos. Our implementation is computationally cheap if the underlying cosmology already has scale-dependent growth factors and it is shown to be able to produce results that match N-body to percent level accuracy for both the total and CDM matter power-spectra up to k≲ 1 h/Mpc.
Original languageEnglish
JournalJournal of Cosmology and Astroparticle Physics
Issue numberOctober 2017
Publication statusPublished - 31 Oct 2017


  • astro-ph.CO
  • gr-qc
  • RCUK
  • STFC
  • ST/N000668/1


Dive into the research topics of 'COLA with massive neutrinos'. Together they form a unique fingerprint.

Cite this