Change search
ReferencesLink to record
Permanent link

Direct link
Dynamical analysis of R1/square R-2 cosmology: Impact of initial conditions and constraints from supernovae
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
Show others and affiliations
2016 (English)In: PHYSICAL REVIEW D, ISSN 2470-0010, Vol. 94, no 4, 043531Article in journal (Refereed) Published
Abstract [en]

We discuss the cosmological implications of the R square R-2 nonlocal modification to standard gravity. We relax the assumption of special initial conditions in the local formulation of the theory, perform a full phase-space analysis of the system, and show that the late-time cosmology of the model exhibits two distinct evolution paths, on which a large range of values for the present equation of state can be reached. We then compare the general solutions to supernovae data and place constraints on the parameters of the model. In particular, we find that the mass parameter of the theory should be smaller than 1.2 in Hubble units.

Place, publisher, year, edition, pages
American Physical Society , 2016. Vol. 94, no 4, 043531
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:kth:diva-193205DOI: 10.1103/PhysRevD.94.043531ISI: 000381895400002ScopusID: 2-s2.0-84984892526OAI: diva2:1034580

QC 20161012

Available from: 2016-10-12 Created: 2016-09-30 Last updated: 2016-10-12Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Koivisto, Tomi S.
By organisation
Nordic Institute for Theoretical Physics NORDITA
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

ReferencesLink to record
Permanent link

Direct link