Hierarchy of N-point functions in the {Lambda}CDM and ReBEL cosmologies

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.103536· OSTI ID:21503618

Hellwing, Wojciech A ^[1]; Juszkiewicz, Roman ^[1]; Weygaert, Rien van de ^[2]

---

1. Nicolaus Copernicus Astronomical Center, Bartycka 18, 00-719 Warsaw (Poland)
2. Kapteyn Astronomical Institute, University of Groningen, Post Office Box 800, 9725LB Groningen (Netherlands)

In this work we investigate higher-order statistics for the {Lambda}CDM and ReBEL scalar-interacting dark matter models by analyzing 180h{sup -1} Mpc dark matter N-body simulation ensembles. The N-point correlation functions and the related hierarchical amplitudes, such as skewness and kurtosis, are computed using the counts-in-cells method. Our studies demonstrate that the hierarchical amplitudes S{sub n} of the scalar-interacting dark matter model significantly deviate from the values in the {Lambda}CDM cosmology on scales comparable and smaller than the screening length r{sub s} of a given scalar-interacting model. The corresponding additional forces that enhance the total attractive force exerted on dark matter particles at galaxy scales lower the values of the hierarchical amplitudes S{sub n}. We conclude that hypothetical additional exotic interactions in the dark matter sector should leave detectable markers in the higher-order correlation statistics of the density field. We focused in detail on the redshift evolution of the dark matter field's skewness and kurtosis. From this investigation we find that the deviations from the canonical {Lambda}CDM model introduced by the presence of the 'fifth' force attain a maximum value at redshifts 0.5<z<2. We therefore conclude that moderate redshift data are better suited for setting observational constraints on the investigated ReBEL models.

• OSTI ID: 21503618
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 10; Other Information: DOI: 10.1103/PhysRevD.82.103536; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ASYMMETRY
CORRELATION FUNCTIONS
CORRELATIONS
COSMOLOGY
DENSITY
DISTRIBUTION
EVOLUTION
GALAXIES
INTERACTIONS
NONLUMINOUS MATTER
PARTICLES
RED SHIFT
SCREENING
SIMULATION
FUNCTIONS
MATTER
PHYSICAL PROPERTIES