Is the cosmic transparency spatially homogeneous?

2012/10/10 by Jun Chen, Puxun Wu, Hongwei Yu +1 · 2 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #COSMIC cancer database #Cosmology #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Metric expansion of space #Opacity #Redshift #Transparency (behavior) #Universe #astro-ph.CO #gr-qc

paper · pdf · doi:10.1088/1475-7516/2012/10/029

10 pages, 1 figure. Accepted for publication in JCAP on Sept. 26

arxiv created 2012/10/10 · openalex publication_date 2012/10/17 · arxiv updated 2015/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We study the constraints on the cosmic opacity using the latest BAO and Union2 SNIa data in this paper and find that the best fit values seem to indicate that an opaque universe is preferred in redshift regions 0.20-0.35, 0.35-0.44 and 0.60-0.73, whereas, a transparent universe is favored in redshift regions 0.106-0.20, 0.44-0.57 and 0.57-0.60. However, our result is still consistent with a transparent universe at the 1σ confidence level, even though the best-fit cosmic opacity oscillates between zero and some nonzero values as the redshift varies.

Citations

• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• Measuring the Baryon Acoustic Oscillation scale using the Sloan Digital Sky Survey and 2dF Galaxy Redshift Survey
• Intergalactic Dust and Observations of Type Ia Supernovae
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Improved Cosmological Constraints from New, Old, and Combined Supernova Data Sets
• Cosmic distance-duality as a probe of exotic physics and acceleration

Cited by

• Violation of the FRW consistency condition as a signature of backreaction
• Testing distance duality with CMB anisotropies

Related

• Model-independent constraints on the cosmic opacity
• Universe opacity and cosmic dynamics
• Constraints on Cosmic Opacity from Bayesian Machine Learning: The hidden side of the H₀ tension problem
• Implications for dark energy of cosmic transparency in light of DESI data
• Revisiting the Indication for a low opacity Universe for very high energy gamma-rays