TY - JOUR
T1 - DGP cosmological model with generalized Ricci dark energy
AU - Aguilera, Yeremy
AU - Avelino, Arturo
AU - Cruz, Norman
AU - Lepe, Samuel
AU - Peña, Francisco
N1 - Funding Information:
NC and SL acknowledge the hospitality of the Physics Department of Universidad de La Frontera where part of this work was done. SL and FP acknowledge the hospitality of the Physics Department of Universidad de Santiago de Chile. We acknowledge the support to this research by CONICYT through grant 1110076 (SL) and grant 1140238 (NC). This work was also supported from DIUFRO DI14-0007, Dirección de Investigación y Desarrollo, Universidad de La Frontera (FP) and VRIEA-DI-PUCV grant 037.377/2014, Pontificia Universidad Católica de Valparaíso (SL). A.A. acknowledges the Mexico-Harvard Fellowship, the NSF for AST12-11196 and the Instituto Avanzado de Cosmología of Mexico. We acknowledge the use of emcee: The MCMC Hammer Foreman-Mackey et al. [], and the triangle.py python package [].
Publisher Copyright:
© 2014, The Author(s).
PY - 2014/11/15
Y1 - 2014/11/15
N2 - The brane-world model proposed by Dvali, Gabadadze and Porrati (DGP) leads to an accelerated universe without cosmological constant or other form of dark energy for the positive branch (Formula presented.). For the negative branch (Formula presented.) we have investigated the behavior of a model with an holographic Ricci-like dark energy and dark matter, where the IR cutoff takes the form (Formula presented.), H being the Hubble parameter and α, β positive constants of the model. We perform an analytical study of the model in the late-time dark energy dominated epoch, where we obtain a solution for (Formula presented.), where rc is the leakage scale of gravity into the bulk, and conditions for the negative branch on the holographic parameters α and β, in order to hold the conditions of weak energy and accelerated universe. On the other hand, we compare the model versus the late-time cosmological data using the latest type Ia supernova sample of the Joint Light-curve Analysis (JLA), in order to constrain the holographic parameters in the negative branch, as well as rcH0 in the positive branch, where H0 is the Hubble constant. We find that the model has a good fit to the data and that the most likely values for (Formula presented.) lie in the permitted region found from an analytical solution in a dark energy dominated universe. We give a justification to use a holographic cutoff in 4D for the dark energy in the 5-dimensional DGP model. Finally, using the Bayesian Information Criterion we find that this model is disfavored compared with the flat (Formula presented.) CDM model.
AB - The brane-world model proposed by Dvali, Gabadadze and Porrati (DGP) leads to an accelerated universe without cosmological constant or other form of dark energy for the positive branch (Formula presented.). For the negative branch (Formula presented.) we have investigated the behavior of a model with an holographic Ricci-like dark energy and dark matter, where the IR cutoff takes the form (Formula presented.), H being the Hubble parameter and α, β positive constants of the model. We perform an analytical study of the model in the late-time dark energy dominated epoch, where we obtain a solution for (Formula presented.), where rc is the leakage scale of gravity into the bulk, and conditions for the negative branch on the holographic parameters α and β, in order to hold the conditions of weak energy and accelerated universe. On the other hand, we compare the model versus the late-time cosmological data using the latest type Ia supernova sample of the Joint Light-curve Analysis (JLA), in order to constrain the holographic parameters in the negative branch, as well as rcH0 in the positive branch, where H0 is the Hubble constant. We find that the model has a good fit to the data and that the most likely values for (Formula presented.) lie in the permitted region found from an analytical solution in a dark energy dominated universe. We give a justification to use a holographic cutoff in 4D for the dark energy in the 5-dimensional DGP model. Finally, using the Bayesian Information Criterion we find that this model is disfavored compared with the flat (Formula presented.) CDM model.
UR - http://www.scopus.com/inward/record.url?scp=84919933839&partnerID=8YFLogxK
U2 - 10.1140/epjc/s10052-014-3172-0
DO - 10.1140/epjc/s10052-014-3172-0
M3 - Article
AN - SCOPUS:84919933839
VL - 74
JO - European Physical Journal C
JF - European Physical Journal C
SN - 1434-6044
IS - 11
M1 - 3172
ER -