Testing the effects from dark radiation

Abstract

In this letter, the effects of dark radiation (DR) are tested. Theoretically, the phase-space analysis method is applied to check whether the model is consist with the history of our universe which shows positive results. Observationally, by using the observational data ($SNLS$ (SuperNovae Legacy Survey), $WMAP9$(Wilkinson Microwave Anisotropy Probe 9 Years Result), $PLANCK$ (Planck First Data Release), $BAO$ (Baryon Acoustic Oscillations), $H(z)$ (Hubble Parameter Data) and $BBN$ (Big Bang Nucleosynthesis)), the dark radiation is found to have the effect of wiping out the tension between the $SNLS$ data and the other data in flat $\Lambda CDM$ model. The effects of dark radiation also make the best fit value of $N_{eff}$ slightly larger than 3.04.

17 figures, accepted by CQG

References in corpus (17)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Three Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Polarization Analysis
• Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Temperature Analysis
• Supernova Constraints and Systematic Uncertainties from the First 3 Years of the Supernova Legacy Survey
• Measuring the Baryon Acoustic Oscillation scale using the SDSS and 2dFGRS
• Two new diagnostics of dark energy
• SNLS3: Constraints on Dark Energy Combining the Supernova Legacy Survey Three Year Data with Other Probes
• Galaxy clusters discovered via the Sunyaev-Zel'dovich effect in the first 720 square degrees of the South Pole Telescope survey
• A measurement of secondary cosmic microwave background anisotropies with two years of South Pole Telescope observations
• The Case for Dark Radiation
• Limits on Dark Radiation, Early Dark Energy, and Relativistic Degrees of Freedom
• Dark Radiation Emerging After Big Bang Nucleosynthesis?
• A new null diagnostic customized for reconstructing the properties of dark energy from BAO data
• Dark Radiation from Particle Decays during Big Bang Nucleosynthesis
• A Comparative Study of Dark Energy Constraints from Current Observational Data
• How Flat is Our Universe Really?
• Towards observational constraints on negative (1+z)^4 type contribution in the Friedmann equation