Cosmic Degeneracies I: Joint N-body Simulations of Modified Gravity and Massive Neutrinos

@article{Baldi2013CosmicDI,
  title={Cosmic Degeneracies I: Joint N-body Simulations of Modified Gravity and Massive Neutrinos},
  author={Marco Baldi and Francisco Villaescusa-Navarro and Matteo Viel and Ewald Puchwein and Volker Springel and Lauro Moscardini},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2013},
  volume={440},
  pages={75-88}
}
We present the first suite of cosmological N-body simulation s that simultaneously include the effects of two different and theoretically indepe ndent extensions of the standard �CDM cosmological scenario ‐ namely an f(R) theory of Modified Gravity (MG) and a cosmological background of massive neutrinos ‐ with the aim to investigate their possible observational degeneracies. We focus on three basic statistics of the large-scale matter distribution, more specifically the nonlinear matter power… 
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99 Citations
Background Citations
28
Methods Citations
14
Results Citations
3

99 Citations

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References

SHOWING 1-10 OF 88 REFERENCES

Non-linear evolution of the cosmic neutrino background

We investigate the non-linear evolution of the relic cosmic neutrino background by running large box-size, high resolution N-body simulations which incorporate cold dark matter (CDM) and neutrinos as…

Neutrinos in non-linear structure formation — the effect on halo properties

We use N-body simulations to find the effect of neutrino masses on halo properties, and investigate how the density profiles of both the neutrino and the dark matter components change as a function…

The impact of massive neutrinos on the abundance of massive clusters

We study the spherical, top-hat collapse model for a mixed dark matter model including cold dark matter (CDM) and massive neutrinos of mass scales ranging from m_nu= 0.05 to a few 0.1eV, the range of…

Cosmology with massive neutrinos II: on the universality of the halo mass function and bias

We use a large suite of N-body simulations to study departures from universality in halo abundances and clustering in cosmologies with non-vanishing neutrino masses. To this end, we study how the…

Cosmology with massive neutrinos III: the halo mass function and an application to galaxy clusters

We use a suite of N-body simulations that incorporate massive neutrinos as an extra-set of particles to investigate their effect on the halo mass function. We show that for cosmologies with massive…

Cosmology with massive neutrinos I: towards a realistic modeling of the relation between matter, haloes and galaxies

By using a suite of large box-size N-body simulations that incorporate massive neutrinos as an extra set of particles, with total masses of 0.15, 0.30, and 0.60 eV, we investigate the impact of…

Nonlinear evolution of f ( R ) cosmologies. III. Halo statistics

The statistical properties of dark matter halos, the building blocks of cosmological observables associated with structure in the Universe, offer many opportunities to test models for cosmic…

SIMULTANEOUS CONSTRAINTS ON THE NUMBER AND MASS OF RELATIVISTIC SPECIES

Recent indications from both particle physics and cosmology suggest the possible existence of more than three neutrino species. In cosmological analyses the effects of neutrino mass and number of…

Massive neutrinos and cosmology

Constraints on Neutrino Mass and Light Degrees of Freedom in Extended Cosmological Parameter Spaces

From a combination of probes including the cosmic microwave background (WMAP7+SPT), Hubble constant (HST), baryon acoustic oscillations (SDSS+2dFGRS), and supernova distances (Union2), we have…
...