Modified Baryonic Dynamics

Two-component cosmological simulations with light sterile neutrinos

G. W. Angus, A. Diaferio, B. Famaey, G. Gentile, K. J Van Der Heyden

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    In this article we continue to test cosmological models centred on Modified Newtonian 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 cosmological 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 formulation 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.

    Original languageEnglish
    Article number079
    JournalJournal of Cosmology and Astroparticle Physics
    Volume2014
    Issue number10
    DOIs
    Publication statusPublished - Oct 1 2014

    Fingerprint

    neutrinos
    galaxies
    dynamic models
    simulation
    gravitational fields
    preserving
    power spectra
    baryons
    halos
    tuning
    formulations
    predictions

    All Science Journal Classification (ASJC) codes

    • Astronomy and Astrophysics

    Cite this

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    abstract = "In this article we continue to test cosmological models centred on Modified Newtonian 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 cosmological 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 formulation 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.",
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    Modified Baryonic Dynamics : Two-component cosmological simulations with light sterile neutrinos. / Angus, G. W.; Diaferio, A.; Famaey, B.; Gentile, G.; Heyden, K. J Van Der.

    In: Journal of Cosmology and Astroparticle Physics, Vol. 2014, No. 10, 079, 01.10.2014.

    Research output: Contribution to journalArticle

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    T2 - Two-component cosmological simulations with light sterile neutrinos

    AU - Angus, G. W.

    AU - Diaferio, A.

    AU - Famaey, B.

    AU - Gentile, G.

    AU - Heyden, K. J Van Der

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