### 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 language | English |
---|---|

Article number | 079 |

Journal | Journal of Cosmology and Astroparticle Physics |

Volume | 2014 |

Issue number | 10 |

DOIs | |

Publication status | Published - Oct 1 2014 |

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### All Science Journal Classification (ASJC) codes

- Astronomy and Astrophysics

### Cite this

*Journal of Cosmology and Astroparticle Physics*,

*2014*(10), [079]. https://doi.org/10.1088/1475-7516/2014/10/079

}

*Journal of Cosmology and Astroparticle Physics*, vol. 2014, no. 10, 079. https://doi.org/10.1088/1475-7516/2014/10/079

**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.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Modified Baryonic Dynamics

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

PY - 2014/10/1

Y1 - 2014/10/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84908540419&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84908540419&partnerID=8YFLogxK

U2 - 10.1088/1475-7516/2014/10/079

DO - 10.1088/1475-7516/2014/10/079

M3 - Article

VL - 2014

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

SN - 1475-7516

IS - 10

M1 - 079

ER -