Skip to content

Reconciling CMB and structure growth measurements with dark energy interactions

Research output: Contribution to journalArticle

We study a coupled quintessence model with pure momentum exchange and present the effects of such an interaction on the cosmic microwave background (CMB) and matter power spectrum. For a wide range of negative values of the coupling parameter β structure growth is suppressed and the model can reconcile the tension between cosmic microwave background observations and structure growth inferred from cluster counts. We find that this model is as good as ΛCDM for CMB and baryon acoustic oscillation data, while the addition of cluster data makes the model strongly preferred, improving the best-fit χ2 value by more than 16.
Original languageEnglish
Article number043518
JournalPhysical Review D
Volume94
DOIs
Publication statusPublished - 15 Aug 2016

Documents

  • paper_accepted

    Accepted author manuscript (Post-print), 510 KB, PDF document

Related information

Relations Get citation (various referencing formats)

ID: 4603884