Cristin-prosjekt-ID: 406878
Sist endret: 21. juli 2014 08:56
Cristin-prosjekt-ID: 406878
Sist endret: 21. juli 2014 08:56
Prosjekt

Norwegian Participation in Euclid: Massive Neutrinos and Dark Couplings

prosjektleder

Per Vidar Barth Lilje
ved Institutt for teoretisk astrofysikk ved Universitetet i Oslo

prosjekteier / koordinerende forskningsansvarlig enhet

  • Institutt for teoretisk astrofysikk ved Universitetet i Oslo

Finansiering

  • TotalbudsjettNOK 2.000.000
  • Norges forskningsråd

    • Prosjektkode: 208014

Klassifisering

Vitenskapsdisipliner

Astrofysikk, astronomi

Kategorier

Prosjektkategori

  • Grunnforskning

Tidsramme

Avsluttet
Start: 1. januar 2011 Slutt: 31. juli 2013

Beskrivelse Beskrivelse

Tittel

Norwegian Participation in Euclid: Massive Neutrinos and Dark Couplings

Vitenskapelig sammendrag

One of the most outstanding problems in physics and astrophysics today is the existence of dark energy, which is inferred from the apparent accelerated expansion of the universe. Dark energy is believed to comprise about 70% of the energy content of the universe today, however, it's nature is largely unknown. The simplest model is to assume that the dark energy is in the form of a cosmological constant. There are, however, good reasons to believe that the nature of the dark energy could be more complicated than this. In this project we will study a family of models where dark energy is a scalar field that couples to either cold dark matter, baryons or neutrinos. The nature and value of neutrino masses are other important problems in today's physics. Neutrinos are known to possess a small mass, but the limits on the absolute scale on neutrino mass are still poor. The best limits on neutrino mass today come from cosmology, however there have been identified strong degeneracies between neutrino mass and dark energy parameters, especially for the coupled models. Euclid is a proposed ESA M-class mission with a targeted launch in 2018. Its primary objective is to study dark energy, and the neutrino mass is one of the secondary objectives of the experiment. The main observational targets will be baryonic acoustic oscillations, and weak lensing measurements. In this proposal we will study the above models, emphasizing the use of the matter power spectrum and its ability when it comes to constraining the dark energy models and massive neutrinos. There are good reasons to believe that the achievements of the experiment could be different when confronted with our concrete, physical models, than when constraining the simplest, observationally based dark energy parameters. This project also covers the organizational part of the Norwegian Euclid participation, including industrial relations and preparations for a segment of the Euclid Science Data Centres in Oslo.

prosjektdeltakere

prosjektleder
Aktiv cristin-person

Per Vidar Barth Lilje

  • Tilknyttet:
    Prosjektleder
    ved Institutt for teoretisk astrofysikk ved Universitetet i Oslo

David Fonseca Mota

  • Tilknyttet:
    Prosjektdeltaker
    ved Institutt for teoretisk astrofysikk ved Universitetet i Oslo

Øystein Elgarøy

  • Tilknyttet:
    Prosjektdeltaker
    ved Institutt for teoretisk astrofysikk ved Universitetet i Oslo

Tomi Sebastian Koivisto

  • Tilknyttet:
    Prosjektdeltaker
    ved Institutt for teoretisk astrofysikk ved Universitetet i Oslo
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Resultater Resultater

Consistency of nonminimally coupled f(R) gravity.

Tamanini, Nicola; Koivisto, Tomi Sebastian. 2013, Physical Review D. Particles and fields. UIO, UCLVitenskapelig artikkel

Gravitational Entropy and Inflation.

Elgarøy, Øystein; Grøn, Øyvind. 2013, Entropy. OSLOMET, UIOVitenskapelig artikkel

The virial theorem and the dark matter problem in hybrid metric-Palatini gravity.

Capoziello, S.; Harko, T.; Koivisto, Tomi Sebastian; Lobo, F. S. N.; Olmo, G. J.. 2013, Journal of Cosmology and Astroparticle Physics. UdV, UdSFIdN, UIO, ULISBOA, INFN, UCLVitenskapelig artikkel

Cosmological perturbations from statistical thermal fluctuations.

Biswas, T.; Brandenberger, R.; Koivisto, Tomi Sebastian; Mazumdar, A.. 2013, Physical Review D. Particles and fields. UOL, LUNO, UIO, MCGILLVitenskapelig artikkel

Non-locality of the C- and D-theories.

Sandstad, Marit; Koivisto, Tomi Sebastian; Mota, David . 2013, Classical and quantum gravity. UIOVitenskapelig artikkel
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