Effects of coupled dark energy on the Milky Way and its satellites

@article{Penzo2016EffectsOC,
title={Effects of coupled dark energy on the Milky Way and its satellites},
author={Camilla Penzo and Andrea V. Macci{\o} and Marco Baldi and Luciano Casarini and Jos{\'e} O{\~n}orbe},
journal={Monthly Notices of the Royal Astronomical Society},
year={2016},
volume={461},
pages={2490-2501}
}`
• Published 27 April 2015
• Physics
• Monthly Notices of the Royal Astronomical Society
We present the first numerical simulations in coupled dark energy cosmologies with high enough resolution to investigate the effects of the coupling on galactic and sub-galactic scales. We choose two constant couplings and a time-varying coupling function and we run simulations of three Milky-Way-size halos ($\sim$10$^{12}$M$_{\odot}$), a lower mass halo (6$\times$10$^{11}$M$_{\odot}$) and a dwarf galaxy halo (5$\times$10$^{9}$M$_{\odot}$). We resolve each halo with several millions dark matter…
12 Citations

Figures and Tables from this paper

The impact of dark energy on galaxy formation. What does the future of our Universe hold

• Physics
• 2018
We investigate the effect of the accelerated expansion of the Universe due to a cosmological constant, Λ, on the cosmic star formation rate. We utilize hydrodynamical simulations from the EAGLE

Fitting and forecasting coupled dark energy in the non-linear regime

• Physics
• 2016
We consider cosmological models in which dark matter feels a fifth force mediated by the dark energy scalar field, also known as coupled dark energy. Our interest resides in estimating forecasts for

Galaxy and structure formation in dynamical and coupled dark energy

In this thesis I study the effects of different Dark Energy models on galaxy formation via numerical simulations. I investigate systems around and be- low Milky-Way masses and describe the effects of

Zoomed high-resolution simulations of Multi-coupled Dark Energy: cored galaxy density profiles at high redshift

• Physics
• 2015
We perform for the first time high-resolution zoom-in re-simulations of individual halos in the context of the Multi-coupled Dark Energy (McDE) scenario, which is characterised by the existence of

On the Mass Assembly History of the Local Group

• Physics
Monthly Notices of the Royal Astronomical Society
• 2019
In this work an ensemble of simulated Local Group analogues is used to constrain the properties of the mass assembly history of the Milky Way (MW) and Andromeda (M31) galaxies. These objects have

Constraining the mass of the Local Group

• Physics
• 2017
The mass of the Local Group (LG) is a crucial parameter for galaxy formation theories. However, its observational determination is challenging - its mass budget is dominated by dark matter which

Dynamics of expansion of the Universe in the models with nonminimally coupled dark energy

• Physics
• 2016
The dark energy model with barotropic equation of state, which interacts with dark matter by gravitation and by other force, which causes the energy-momentum exchange between them, is considered.

Simulation techniques for modified gravity

• C. Llinares
• Computer Science
International Journal of Modern Physics D
• 2018
This review summarizes existing techniques for dealing with modified gravity (MG) in the context of cosmological simulations and describes the required extensions, classifying the models not according to their original motivation, but by the numerical challenges that must be faced by numericists.

References

SHOWING 1-10 OF 73 REFERENCES

Strongly coupled dark energy cosmologies: preserving ΛCDM success and easing low-scale problems – II. Cosmological simulations

• Physics
• 2015
In this second paper we present the first Nbody cosmological simulations of strongly coupled Dark Energy models (SCDEW), a class of models that alleviates theoretical issues related to the nature of

Probing the coupling between dark components of the universe

• Materials Science
• 2007
We place observational constraints on a coupling between dark energy and dark matter by using 71 Type Ia supernovae (SNe Ia) from the first year of the five-year Supernova Legacy Survey (SNLS), the

Constraints on coupled dark energy using CMB data from WMAP and South Pole Telescope

• Physics
• 2012
We consider the case of a coupling in the dark cosmological sector, where a dark energy scalar field modifies the gravitational attraction between dark matter particles. We find that the strength of

Strongly coupled dark energy cosmologies: preserving ΛCDM success and easing low scale problems – I. Linear theory revisited

• Physics
• 2015
In this first paper we discuss the linear theory and the background evolution of a new class of models we dub SCDEW: Strongly Coupled DE, plus WDM. In these models, WDM dominates today's matter

OBSERVATIONAL AND THEORETICAL CONSTRAINTS ON SINGULAR DARK MATTER HALOS

• Physics
• 1994
The distribution of dark matter around galactic or cluster halos has usually been assumed to be approximately isothermal with a non-zero core radius, which is expected to be of the order of the size

Hints on the nature of dark matter from the properties of Milky Way satellites

• Physics
• 2013
The nature of dark matter is still unknown and one of the most fundamental scientific mysteries. Although successfully describing large scales, the standard cold dark matter model (CDM) exhibits

The galactic halo in mixed dark matter cosmologies

• Physics
• 2012
A possible solution to the small scale problems of the cold dark matter (CDM) scenario is that the dark matter consists of two components, a cold and a warm one. We perform a set of high resolution

Luminosity function and radial distribution of Milky Way satellites in a ΛCDM Universe

• Physics
• 2009
We study the luminosity function (LF) and the radial distribution of satellite galaxies within Milky Way (MW) sized haloes as predicted in cold dark matter based models of galaxy formation, making

ON THE ASSEMBLY OF THE MILKY WAY DWARF SATELLITES AND THEIR COMMON MASS SCALE

• Physics
• 2012
We use a particle tagging technique to dynamically populate the N-body Via Lactea II high-resolution simulation with stars. The method is calibrated using the observed luminosity function of Milky

Coupled dark energy: Parameter constraints from N-body simulations

• Physics
• 2004
We investigate cosmologies where dark matter (DM) is coupled to dark energy (DE), through N-body simulations. The dark-dark coupling introduces two novel effects in particle dynamics: (i) DM particle