Testing cosmic opacity from SNe Ia and Hubble parameter through three cosmological-model-independent methods

Liao, Kai; Li, Zheng‐Xiang; Ming, J.; Zhu, Zong-Hong

doi:10.1016/j.physletb.2012.12.022

Cited by 44 publications

(80 citation statements)

References 52 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The systematic error related to the integral approximation has been shown to be much smaller than the observational one [29].…”

Section: ) Wherementioning

confidence: 93%

“…Based on previous works [28,29], we introduce an improved method to get luminosity distances that are not affected by cosmic opacity and are also independent of any specific cosmological model. We consider constructing 19 luminosity distances D H L (z n ), n = 1, 2...19, from the H(z) data at the corresponding redshifts by:…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, we have to calculate the 19 × 19 covariance matrix for D H L (z n ) rather than 19 independent errors [28,29]. Also, even for a specific luminosity distance, previous investigations have used an inappropriate error estimate not considering the correlations between adjacent bins.…”

Section: ) Wherementioning

confidence: 99%

“…On the other hand, in Refs. [24,[28][29][30], distances derived from other opacity-independent probes, e.g. observational determinations of the Hubble parameter H(z) based on differential ageing of passively evolving galaxies (also dubbed "cosmic chronometers") [31], were proposed to test or even quantify cosmic opacity by comparing these distances with those from SN Ia observations.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Is the Universe transparent?

Liao

Avgoustidis

2015

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

We present our study on cosmic opacity, which relates to changes in photon number as photons travel from the source to the observer. Cosmic opacity may be caused by absorption/scattering due to matter in the universe, or by extragalactic magnetic fields that can turn photons into unobserved particles (e.g. light axions, chameleons, gravitons, Kaluza-Klein modes), and it is crucial to correctly interpret astronomical photometric measurements like type Ia supernovae observations. On the other hand, the expansion rate at different epochs, i.e. the observational Hubble parameter data H(z), are obtained from differential ageing of passively evolving galaxies or from baryon acoustic oscillations and thus are not affected by cosmic opacity. In this work, we first construct opacity-free luminosity distances from H(z) determinations, taking correlations between different redshifts into consideration for our error analysis. Moreover, we let the light-curve fitting parameters, accounting for distance estimation in type Ia supernovae observations, free to ensure that our analysis is authentically cosmological-model-independent and gives a robust result. Any non-zero residuals between these two kinds of luminosity distances can be deemed as an indication of the existence of cosmic opacity. While a transparent universe is currently consistent with the data, our results show that strong constraints on opacity (and consequently on physical mechanisms that could cause it) can be obtained in a cosmological-model-independent fashion.PACS numbers: 98.80.-k, 98.80.Es

show abstract

“…The systematic error related to the integral approximation has been shown to be much smaller than the observational one [29].…”

Section: ) Wherementioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: ) Wherementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Is the Universe transparent?

Liao

Avgoustidis

2015

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

show abstract

“…(8)- (10). We center in a model where the energy exchange is given by transversal interactions which are linearly dependent on ρ x , ρ m , ρ r , along with their derivatives up to first order, and ρ, ρ ′ , ρ ′′ , ρ ′′′ .…”

Section: Model I: Enlarged Dark Sectormentioning

confidence: 99%

Interacting dark sector with transversal interaction

Chimento

Richarte

2015

AIP Conference Proceedings

View full text Add to dashboard Cite

We investigate the interacting dark sector composed of dark matter, dark energy, and dark radiation for a spatially flat Friedmann-Robertson-Walker (FRW) background by introducing a threedimensional internal space spanned by the interaction vector Q and solve the source equation for a linear transversal interaction. Then, we explore a realistic model with dark matter coupled to a scalar field plus a decoupled radiation term, analyze the amount of dark energy in the radiation era and find that our model is consistent with the recent measurements of cosmic microwave background anisotropy coming from Planck along with the future constraints achievable by CMBPol experiment.

show abstract

On extended sign-changeable interactions in the dark sector

Forte

2014

Gen Relativ Gravit

View full text Add to dashboard Cite

We extend the cosmological couplings proposed in Sun et al. and Wei, where they suggested interactions with change of signs along the cosmological evolution. Our extension liberates the changes of sign of the interaction from the deceleration parameter and from the relation of energy densities of the dark sector and considers the presence of non interactive matter. In three cases we obtain the general solutions and the results obtained in models fitted with Hubble's function and SNe Ia data, are analyzed regarding the problem of the cosmological coincidence, the problem of the crisis of the cosmological age and the magnitude of the energy density of dark energy at early universe. Also we graphically study the range of variation of, the actual dark matter density parameter, the effective equation of state of the dark energy and the redshift of transition to the accelerated regimen, generated by variations at order $1\sigma$ in the coupling parameters.Comment: 20 pages, 26 figures,title shortened, new references added, to be published in General Relativity and Gravitation journal. The final publication will be available at Springer via link.springer.com/article/10.1007/s10714-014-1811-

show abstract

Testing cosmic opacity from SNe Ia and Hubble parameter through three cosmological-model-independent methods

Cited by 44 publications

References 52 publications

Is the Universe transparent?

Is the Universe transparent?

Interacting dark sector with transversal interaction

On extended sign-changeable interactions in the dark sector

Contact Info

Product

Resources

About