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Title: Power-law parametrized quintessence model

Abstract

We propose a simple power-law parametrized quintessence model with time-varying equation of state and obtain corresponding quintessence potential of this model. This model is compared with Supernova Type Ia (SNIa) Gold sample data, size of baryonic acoustic peak from Sloan Digital Sky Survey (SDSS), the position of the acoustic peak from the CMB observations and structure formation from the 2dFGRS survey and put constrain on the parameters of model. The parameters from the best fit indicates that the equation of state of this model at the present time is w{sub 0}=-1.40{sub -0.65}{sup +0.40} at 1{sigma} confidence level. Finally we calculate the age of universe in this model and compare it with the age of old cosmological objects.

Authors:
 [1];  [1];  [2]
  1. Department of Physics, Sharif University of Technology, P.O. Box 11365-9161, Tehran (Iran, Islamic Republic of)
  2. (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
20935212
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevD.75.023512; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BARYONS; COSMOLOGICAL MODELS; EQUATIONS OF STATE; NONLUMINOUS MATTER; SUPERNOVAE; UNIVERSE

Citation Formats

Rahvar, Sohrab, Movahed, M. Sadegh, and Institute for Studies in Theoretical Physics and Mathematics, P.O. Box 19395-5531, Tehran. Power-law parametrized quintessence model. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.023512.
Rahvar, Sohrab, Movahed, M. Sadegh, & Institute for Studies in Theoretical Physics and Mathematics, P.O. Box 19395-5531, Tehran. Power-law parametrized quintessence model. United States. doi:10.1103/PHYSREVD.75.023512.
Rahvar, Sohrab, Movahed, M. Sadegh, and Institute for Studies in Theoretical Physics and Mathematics, P.O. Box 19395-5531, Tehran. Mon . "Power-law parametrized quintessence model". United States. doi:10.1103/PHYSREVD.75.023512.
@article{osti_20935212,
title = {Power-law parametrized quintessence model},
author = {Rahvar, Sohrab and Movahed, M. Sadegh and Institute for Studies in Theoretical Physics and Mathematics, P.O. Box 19395-5531, Tehran},
abstractNote = {We propose a simple power-law parametrized quintessence model with time-varying equation of state and obtain corresponding quintessence potential of this model. This model is compared with Supernova Type Ia (SNIa) Gold sample data, size of baryonic acoustic peak from Sloan Digital Sky Survey (SDSS), the position of the acoustic peak from the CMB observations and structure formation from the 2dFGRS survey and put constrain on the parameters of model. The parameters from the best fit indicates that the equation of state of this model at the present time is w{sub 0}=-1.40{sub -0.65}{sup +0.40} at 1{sigma} confidence level. Finally we calculate the age of universe in this model and compare it with the age of old cosmological objects.},
doi = {10.1103/PHYSREVD.75.023512},
journal = {Physical Review. D, Particles Fields},
number = 2,
volume = 75,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}