Modified Baryonic Dynamics: two-component cosmological simulations with light sterile neutrinos

Garry Angus, Gianfranco Gentile

Onderzoeksoutput: Articlepeer review

5 Citaten (Scopus)

Samenvatting

In this article we continue to test cosmological models centred on Modified New- tonian Dynamics (MOND) with light sterile neutrinos, which could in principle be a way to solve the fine-tuning problems of the standard model on galaxy scales while preserving successful predictions on larger scales. Due to previous failures of the simple MOND cos- mological model, here we test a speculative model where the modified gravitational field is produced only by the baryons and the sterile neutrinos produce a purely Newtonian field (hence Modified Baryonic Dynamics). We use two-component cosmological simulations to separate the baryonic N-body particles from the sterile neutrino ones. The premise is to attenuate the over-production of massive galaxy cluster halos which were prevalent in the original MOND plus light sterile neutrinos scenario. Theoretical issues with such a formu- lation notwithstanding, the Modified Baryonic Dynamics model fails to produce the correct amplitude for the galaxy cluster mass function for any reasonable value of the primordial power spectrum normalisation.
Originele taal-2English
Artikelnummer079
Aantal pagina's17
TijdschriftJournal of Cosmology and Astroparticle Physics
Volume2014
Nummer van het tijdschrift10
DOI's
StatusPublished - 2014

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