FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2114925115> ?p ?o ?g. }

• W2114925115 endingPage "1415" @default.
• W2114925115 startingPage "1396" @default.
• W2114925115 abstract "The explanation of the accelerated expansion of the Universe poses one of the most fundamental questions in physics and cosmology today. If the acceleration is driven by some form of dark energy (DE), and in the absence of a well-based theory to interpret the observations, one can try to constrain the parameters describing the kinematical state of the universe using a cosmographic approach, which is fundamental in that it requires only a minimal set of assumptions, namely to specify the metric, and it does not rely on the dynamical equations for gravity. Our high-redshift analysis allows us to put constraints on the cosmographic expansion up to the fifth order. It is based on the Union2 type Ia Supernovae (SNIa) data set, the Hubble diagram constructed from some gamma ray burst luminosity distance indicators, and Gaussian priors on the distance from the baryon acoustic oscillations, and the Hubble constant h (these priors have been included in order to help break the degeneracies among model parameters). To perform our statistical analysis and to explore the probability distributions of the cosmographic parameters, we use the Markov Chain Monte Carlo method (MCMC). We finally investigate implications of our results for the DE; in particular, we focus on the parametrization of the DE equation of state (EOS). Actually, a possibility of investigating the nature of DE lies in measuring the DE EOS, w, and its time (or redshift) dependence at high accuracy. However, since w(z) is not directly accessible to measurement, reconstruction methods are needed to extract it reliably from observations. Here we investigate different models of DE, described through several parametrizations of the EOS, by comparing the cosmographic and the EOS series. The main results are as follows: (a) even if relying on a mathematical approximate assumption such as the scale factor series expansion in terms of time, cosmography can be extremely useful in assessing dynamical properties of the Universe; (b) the deceleration parameter clearly confirms the present acceleration phase; (c) the MCMC method provides stronger constraints for parameter estimation, in particular for higher order cosmographic parameters (the jerk and the snap), with respect to those presented in the literature; (d) both the estimation of the jerk and the DE parameters reflect the possibility of a deviation from the ΛCDM cosmological model; (e) there are indications that the DE EOS is evolving for all the parametrizations that we considered; (f) the q(z) reconstruction provided by our cosmographic analysis allows for a transient acceleration." @default.
• W2114925115 created "2016-06-24" @default.
• W2114925115 creator A5034963559 @default.
• W2114925115 creator A5050187493 @default.
• W2114925115 creator A5061136551 @default.
• W2114925115 creator A5083859491 @default.
• W2114925115 date "2012-10-01" @default.
• W2114925115 modified "2023-09-30" @default.
• W2114925115 title "High-redshift cosmography: new results and implications for dark energy" @default.
• W2114925115 cites W1726522326 @default.
• W2114925115 cites W1853767801 @default.
• W2114925115 cites W1964623468 @default.
• W2114925115 cites W1977240851 @default.
• W2114925115 cites W1982477157 @default.
• W2114925115 cites W1985308589 @default.
• W2114925115 cites W1998395488 @default.
• W2114925115 cites W2002221447 @default.
• W2114925115 cites W2005425668 @default.
• W2114925115 cites W2008334608 @default.
• W2114925115 cites W2020131662 @default.
• W2114925115 cites W2039533309 @default.
• W2114925115 cites W2057351095 @default.
• W2114925115 cites W2057645607 @default.
• W2114925115 cites W2072891987 @default.
• W2114925115 cites W2073832139 @default.
• W2114925115 cites W2077746026 @default.
• W2114925115 cites W2083515540 @default.
• W2114925115 cites W2083637828 @default.
• W2114925115 cites W2086404461 @default.
• W2114925115 cites W2091550488 @default.
• W2114925115 cites W2091910256 @default.
• W2114925115 cites W2099827831 @default.
• W2114925115 cites W2106766431 @default.
• W2114925115 cites W2113869105 @default.
• W2114925115 cites W2114603323 @default.
• W2114925115 cites W2120472141 @default.
• W2114925115 cites W2131260550 @default.
• W2114925115 cites W2137302369 @default.
• W2114925115 cites W2139635167 @default.
• W2114925115 cites W2150427241 @default.
• W2114925115 cites W2154748230 @default.
• W2114925115 cites W2162362007 @default.
• W2114925115 cites W2165365248 @default.
• W2114925115 cites W2169866137 @default.
• W2114925115 cites W2596716325 @default.
• W2114925115 cites W2949099066 @default.
• W2114925115 cites W2963557269 @default.
• W2114925115 cites W3098502490 @default.
• W2114925115 cites W3099582894 @default.
• W2114925115 cites W3100698698 @default.
• W2114925115 cites W3100813615 @default.
• W2114925115 cites W3102228028 @default.
• W2114925115 cites W3105368576 @default.
• W2114925115 cites W3106154993 @default.
• W2114925115 cites W3121856101 @default.
• W2114925115 cites W3122934569 @default.
• W2114925115 cites W3123811236 @default.
• W2114925115 cites W3124025518 @default.
• W2114925115 cites W3125867499 @default.
• W2114925115 cites W4234004282 @default.
• W2114925115 doi "https://doi.org/10.1111/j.1365-2966.2012.21568.x" @default.
• W2114925115 hasPublicationYear "2012" @default.
• W2114925115 type Work @default.
• W2114925115 sameAs 2114925115 @default.
• W2114925115 citedByCount "43" @default.
• W2114925115 countsByYear W21149251152013 @default.
• W2114925115 countsByYear W21149251152014 @default.
• W2114925115 countsByYear W21149251152015 @default.
• W2114925115 countsByYear W21149251152016 @default.
• W2114925115 countsByYear W21149251152017 @default.
• W2114925115 countsByYear W21149251152018 @default.
• W2114925115 countsByYear W21149251152019 @default.
• W2114925115 countsByYear W21149251152020 @default.
• W2114925115 countsByYear W21149251152021 @default.
• W2114925115 countsByYear W21149251152022 @default.
• W2114925115 countsByYear W21149251152023 @default.
• W2114925115 crossrefType "journal-article" @default.
• W2114925115 hasAuthorship W2114925115A5034963559 @default.
• W2114925115 hasAuthorship W2114925115A5050187493 @default.
• W2114925115 hasAuthorship W2114925115A5061136551 @default.
• W2114925115 hasAuthorship W2114925115A5083859491 @default.
• W2114925115 hasBestOaLocation W21149251151 @default.
• W2114925115 hasConcept C103874350 @default.
• W2114925115 hasConcept C105795698 @default.
• W2114925115 hasConcept C111350023 @default.
• W2114925115 hasConcept C121332964 @default.
• W2114925115 hasConcept C121864883 @default.
• W2114925115 hasConcept C165969730 @default.
• W2114925115 hasConcept C172790937 @default.
• W2114925115 hasConcept C19499675 @default.
• W2114925115 hasConcept C20154449 @default.
• W2114925115 hasConcept C26405456 @default.
• W2114925115 hasConcept C2778086583 @default.
• W2114925115 hasConcept C33024259 @default.
• W2114925115 hasConcept C33332235 @default.
• W2114925115 hasConcept C33923547 @default.
• W2114925115 hasConcept C44870925 @default.
• W2114925115 hasConcept C53810900 @default.

• next