Cosmic opacity: cosmological-model-independent tests and their impacts on cosmic acceleration

Abstract

With assumptions that the violation of the distance-duality (DD) relation entirely arises from non-conservation of the photon number and the absorption is frequency independent in the observed frequency range, we perform cosmological-model-independent tests for the cosmic opacity. The observational data include the largest Union2.1 SN Ia sample, which is taken for observed $D_{\mathrm{L}}$, and galaxy cluster samples compiled by De Filippis {\it et al.} and Bonamente {\it et al.}, which are responsible for providing observed $D_{\mathrm{A}}$. Two parameterizations, $\tau (z)=2\epsilon z$ and $\tau (z)=(1+z{)}^{2\epsilon }-1$ are adopted for the optical depth associated to the cosmic absorption. We find that, an almost transparent universe is favored by Filippis {\it et al.} sample but it is only marginally accommodated by Bonomente {\it et al.} samples at 95.4% confidence level (C. L.) (even at 99.7% C. L. when the $r<100\mathrm{kpc}$-cut spherical $\beta$ model is considered). Taking the possible cosmic absorption (in 68.3% C. L. range) constrained from the model-independent tests into consideration, we correct the distance modulus of SNe Ia and then use them to study their cosmological implications. The constraints on the $\Lambda$CDM show that a decelerating expanding universe with ${\Omega }_{\Lambda }=0$ is only allowed at 99.7% C. L. by observations when the Bonamente {\it et al.} sample is considered. Therefore, our analysis suggests that an accelerated cosmic expansion is still needed to account for the dimming of SNe and the standard cosmological scenario remains to be supported by current observations.

17 pages, 5 figures and 1 table, typos corrected and two references added, to appear in Phys. Rev. D

References in corpus (9)

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• Model-independent Constraints on Cosmic Curvature and Opacity
• Cosmic opacity: cosmological-model-independent tests from gravitational waves and Type Ia Supernova
• The cosmic distance duality relation with strong lensing and gravitational waves: an opacity-free test
• Testing the violation of the equivalence principle in the electromagnetic sector and its consequences in $f(T)$ gravity
• Probing the cosmic opacity from Future Gravitational Wave Standard Sirens
• Model-independent test for the cosmic distance duality relation with Pantheon and eBOSS DR16 quasar sample
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• Gravitational-wave constraints on the cosmic opacity at $z\sim 5$: forecast from space gravitational-wave antenna DECIGO
• Unbiased Cosmic Opacity Constraints from Standard Sirens and Candles
• Testing cosmic opacity with the combination of strongly lensed and unlensed supernova Ia
• Investigating the effect of cosmic opacity on standard candles
• The failure of testing for cosmic opacity via the distance-duality relation
• Cosmic transparency and acceleration
• Exploring the potentiality of standard sirens to probe cosmic opacity at high redshifts
• Cosmological-model-independent tests of cosmic distance duality relation with Type Ia supernovae and radio quasars
• Fundamental Physics and Cosmology with TianQin
• X-ray surface brightness observations of galaxy clusters, cosmic opacity and the limits on the matter density parameter
• Model-Independent Probe of Cosmic Distance Duality Relation
• Cosmic constraint on the unified model of dark sectors with or without a cosmic string fluid in the varying gravitational constant theory
• Probing the Cosmic Distance Duality Relation via Non-Parametric Reconstruction for High Redshifts
• Calibrating the effective magnitudes of type Ia supernovae with a model-independent method