Dynamics and constraints of the massive graviton dark matter flat cosmologies

Journal Article · Sun May 15 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.103506· OSTI ID:21502549

Basilakos, S; Plionis, M; Alves, M E. S.; Lima, J A. S. ^[1]

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1. Academy of Athens, Research Center for Astronomy and Applied Mathematics, Soranou Efesiou 4, 11527, Athens (Greece)

We discuss the dynamics of the Universe within the framework of the massive graviton cold dark matter scenario (MGCDM) in which gravitons are geometrically treated as massive particles. In this modified gravity theory, the main effect of the gravitons is to alter the density evolution of the cold dark matter component in such a way that the Universe evolves to an accelerating expanding regime, as presently observed. Tight constraints on the main cosmological parameters of the MGCDM model are derived by performing a joint likelihood analysis involving the recent supernovae type Ia data, the cosmic microwave background shift parameter, and the baryonic acoustic oscillations as traced by the Sloan Digital Sky Survey red luminous galaxies. The linear evolution of small density fluctuations is also analyzed in detail. It is found that the growth factor of the MGCDM model is slightly different ({approx}1-4%) from the one provided by the conventional flat {Lambda}CDM cosmology. The growth rate of clustering predicted by MGCDM and {Lambda}CDM models are confronted to the observations and the corresponding best fit values of the growth index ({gamma}) are also determined. By using the expectations of realistic future x-ray and Sunyaev-Zeldovich cluster surveys we derive the dark matter halo mass function and the corresponding redshift distribution of cluster-size halos for the MGCDM model. Finally, we also show that the Hubble flow differences between the MGCDM and the {Lambda}CDM models provide a halo redshift distribution departing significantly from the those predicted by other dark energy models. These results suggest that the MGCDM model can observationally be distinguished from {Lambda}CDM and also from a large number of dark energy models recently proposed in the literature.

• OSTI ID: 21502549
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 10; Other Information: DOI: 10.1103/PhysRevD.83.103506; (c) 2011 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
BARYONS
COSMOLOGY
DENSITY
DISTRIBUTION
EVOLUTION
FLUCTUATIONS
GALAXIES
GRAVITATION
GRAVITONS
GROWTH FACTORS
MASS
NONLUMINOUS MATTER
OSCILLATIONS
PARTICLES
QUANTUM GRAVITY
RED SHIFT
RELICT RADIATION
SUPERNOVAE
UNIVERSE
X RADIATION
BINARY STARS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ERUPTIVE VARIABLE STARS
FERMIONS
FIELD THEORIES
GRAVITATIONAL RADIATION
HADRONS
IONIZING RADIATIONS
MASSLESS PARTICLES
MATTER
MICROWAVE RADIATION
MITOGENS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
POSTULATED PARTICLES
PROTEINS
QUANTUM FIELD THEORY
RADIATIONS
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