Matches in SemOpenAlex for { <https://semopenalex.org/work/W4226427227> ?p ?o ?g. }
Showing items 1 to 59 of
59
with 100 items per page.
- W4226427227 abstract "In the standard cosmological model the dark energy (DE) and nonrelativistic (NR) matter densities are observationally determined to be comparable at the present time, in spite of their greatly different evolution histories. This `cosmic coincidence' enigma -- also referred to as the `why now? problem' -- relies, by its very definition, on the implicit prior expectation for our `typicality' in the cosmic (expanding) spacetime volume. Otherwise, this conundrum does not exist in the first place. It is shown here that this apparent coincidence could be explained as a non-anthropic observational selection effect: for us to be typical observers in the comoving (static) spacetime volume, the cosmic energy budget must contain a non-vanishing DE component. In addition, it is shown that irrespective of the cosmological initial conditions and assuming no `new physics', the Universe is most likely to be observed at a time when the conformal Hubble radius, $mathcal{H}^{-1}$, attains a maximum. The latter takes place at the epoch when $rho_{DE}$ and $rho_{m}$, the energy densities of DE and NR matter, respectively, are comparable. Specifically, our presumed `typicality' along the conformal timeline, coupled to a few other plausible assumptions, implies that $Requivrho_{DE}/rho_{m}$ is `sampled' from a Beta Prime probability distribution function. A priori 68% (95%) confidence range for the ratio is $0.20<R<3.46$ ($0.033<R<17.20$), with an expectation value of $bar{R}=3.5$. These are in agreement with the observationally inferred value, $R_{obs}=2.23$." @default.
- W4226427227 created "2022-05-05" @default.
- W4226427227 creator A5012763717 @default.
- W4226427227 date "2022-04-05" @default.
- W4226427227 modified "2023-10-18" @default.
- W4226427227 title "Elucidation of 'Cosmic Coincidence'" @default.
- W4226427227 doi "https://doi.org/10.48550/arxiv.2204.02211" @default.
- W4226427227 hasPublicationYear "2022" @default.
- W4226427227 type Work @default.
- W4226427227 citedByCount "0" @default.
- W4226427227 crossrefType "posted-content" @default.
- W4226427227 hasAuthorship W4226427227A5012763717 @default.
- W4226427227 hasBestOaLocation W42264272271 @default.
- W4226427227 hasConcept C121332964 @default.
- W4226427227 hasConcept C130187892 @default.
- W4226427227 hasConcept C142724271 @default.
- W4226427227 hasConcept C172790937 @default.
- W4226427227 hasConcept C204787440 @default.
- W4226427227 hasConcept C26405456 @default.
- W4226427227 hasConcept C2779832538 @default.
- W4226427227 hasConcept C33332235 @default.
- W4226427227 hasConcept C37914503 @default.
- W4226427227 hasConcept C44870925 @default.
- W4226427227 hasConcept C59375849 @default.
- W4226427227 hasConcept C62520636 @default.
- W4226427227 hasConcept C71924100 @default.
- W4226427227 hasConcept C84999194 @default.
- W4226427227 hasConcept C95200732 @default.
- W4226427227 hasConceptScore W4226427227C121332964 @default.
- W4226427227 hasConceptScore W4226427227C130187892 @default.
- W4226427227 hasConceptScore W4226427227C142724271 @default.
- W4226427227 hasConceptScore W4226427227C172790937 @default.
- W4226427227 hasConceptScore W4226427227C204787440 @default.
- W4226427227 hasConceptScore W4226427227C26405456 @default.
- W4226427227 hasConceptScore W4226427227C2779832538 @default.
- W4226427227 hasConceptScore W4226427227C33332235 @default.
- W4226427227 hasConceptScore W4226427227C37914503 @default.
- W4226427227 hasConceptScore W4226427227C44870925 @default.
- W4226427227 hasConceptScore W4226427227C59375849 @default.
- W4226427227 hasConceptScore W4226427227C62520636 @default.
- W4226427227 hasConceptScore W4226427227C71924100 @default.
- W4226427227 hasConceptScore W4226427227C84999194 @default.
- W4226427227 hasConceptScore W4226427227C95200732 @default.
- W4226427227 hasLocation W42264272271 @default.
- W4226427227 hasOpenAccess W4226427227 @default.
- W4226427227 hasPrimaryLocation W42264272271 @default.
- W4226427227 hasRelatedWork W1535399475 @default.
- W4226427227 hasRelatedWork W1975763473 @default.
- W4226427227 hasRelatedWork W1985505729 @default.
- W4226427227 hasRelatedWork W2801762017 @default.
- W4226427227 hasRelatedWork W2970044676 @default.
- W4226427227 hasRelatedWork W2996711340 @default.
- W4226427227 hasRelatedWork W3119146955 @default.
- W4226427227 hasRelatedWork W3128992806 @default.
- W4226427227 hasRelatedWork W4297780806 @default.
- W4226427227 hasRelatedWork W783035367 @default.
- W4226427227 isParatext "false" @default.
- W4226427227 isRetracted "false" @default.
- W4226427227 workType "article" @default.