Matches in SemOpenAlex for { <https://semopenalex.org/work/W2118947089> ?p ?o ?g. }
Showing items 1 to 80 of
80
with 100 items per page.
- W2118947089 abstract "The homogeneous expansion history H(z) of our universe measures only kinematic variables, but cannot fix the underlying dynamics driving the recent acceleration: cosmographic measurements of the homogeneous universe, are consistent with either a static finely-tuned cosmological constant or a dynamic `dark energy' mechanism, which may be material Dark Energy or modified gravity (Dark Gravity). Resolving the composition and foreground noise to reduce their large systematic errors.dynamics of either kind of `dark energy', will require complementing the homogeneous expansion observations with observations of the growth of cosmological fluctuations. Because the 'dark energy' evolution is at least quasi-static, any dynamical effects on the fluctuation growth function g(z) will be minimal. They will be best studied in the weak lensing convergence of light from galaxies at 0<z<5, from neutral hydrogen at 6<z<20, and ultimately from the CMB last scattering surface at z=1089. Galaxy clustering also measures g(z), but requires large corrections for baryonic composition and foreground noise. Projected observations potentially distinguish static from dynamic `dark energy', but distinguishing dynamic Dark Energy from Dark Gravity will require a weak lensing shear survey more ambitious than any now projected. Low-curvature modifications of Einstein gravity are also, in principle, observable in the solar system or in isolated galaxy clusters. The cosmological constant can only be fine-tuned, at present. The Cosmological Coincidence Problem, that we live when the ordinary matter density approximates the 'gravitational vacuum energy', on the other hand, is a material problem, calling for an understanding of the observers' role in cosmology." @default.
- W2118947089 created "2016-06-24" @default.
- W2118947089 creator A5079045590 @default.
- W2118947089 date "2007-02-02" @default.
- W2118947089 modified "2023-09-27" @default.
- W2118947089 title "What Drives Our Accelerating Universe" @default.
- W2118947089 cites W1491588384 @default.
- W2118947089 cites W1994030026 @default.
- W2118947089 cites W1998871856 @default.
- W2118947089 cites W2056264338 @default.
- W2118947089 cites W2098327501 @default.
- W2118947089 cites W2143701114 @default.
- W2118947089 cites W2594609997 @default.
- W2118947089 cites W2981570800 @default.
- W2118947089 cites W2995525184 @default.
- W2118947089 cites W3003408334 @default.
- W2118947089 cites W3092434392 @default.
- W2118947089 cites W611646014 @default.
- W2118947089 hasPublicationYear "2007" @default.
- W2118947089 type Work @default.
- W2118947089 sameAs 2118947089 @default.
- W2118947089 citedByCount "1" @default.
- W2118947089 countsByYear W21189470892016 @default.
- W2118947089 crossrefType "posted-content" @default.
- W2118947089 hasAuthorship W2118947089A5079045590 @default.
- W2118947089 hasConcept C118534291 @default.
- W2118947089 hasConcept C121332964 @default.
- W2118947089 hasConcept C126320844 @default.
- W2118947089 hasConcept C159249277 @default.
- W2118947089 hasConcept C166861157 @default.
- W2118947089 hasConcept C172790937 @default.
- W2118947089 hasConcept C190670322 @default.
- W2118947089 hasConcept C26405456 @default.
- W2118947089 hasConcept C29761201 @default.
- W2118947089 hasConcept C33024259 @default.
- W2118947089 hasConcept C33332235 @default.
- W2118947089 hasConcept C44870925 @default.
- W2118947089 hasConcept C57853336 @default.
- W2118947089 hasConcept C98444146 @default.
- W2118947089 hasConceptScore W2118947089C118534291 @default.
- W2118947089 hasConceptScore W2118947089C121332964 @default.
- W2118947089 hasConceptScore W2118947089C126320844 @default.
- W2118947089 hasConceptScore W2118947089C159249277 @default.
- W2118947089 hasConceptScore W2118947089C166861157 @default.
- W2118947089 hasConceptScore W2118947089C172790937 @default.
- W2118947089 hasConceptScore W2118947089C190670322 @default.
- W2118947089 hasConceptScore W2118947089C26405456 @default.
- W2118947089 hasConceptScore W2118947089C29761201 @default.
- W2118947089 hasConceptScore W2118947089C33024259 @default.
- W2118947089 hasConceptScore W2118947089C33332235 @default.
- W2118947089 hasConceptScore W2118947089C44870925 @default.
- W2118947089 hasConceptScore W2118947089C57853336 @default.
- W2118947089 hasConceptScore W2118947089C98444146 @default.
- W2118947089 hasLocation W21189470891 @default.
- W2118947089 hasOpenAccess W2118947089 @default.
- W2118947089 hasPrimaryLocation W21189470891 @default.
- W2118947089 hasRelatedWork W1502352316 @default.
- W2118947089 hasRelatedWork W1508099578 @default.
- W2118947089 hasRelatedWork W1525978191 @default.
- W2118947089 hasRelatedWork W1558261684 @default.
- W2118947089 hasRelatedWork W1616786752 @default.
- W2118947089 hasRelatedWork W1786634346 @default.
- W2118947089 hasRelatedWork W1807614816 @default.
- W2118947089 hasRelatedWork W2022350926 @default.
- W2118947089 hasRelatedWork W2144540105 @default.
- W2118947089 hasRelatedWork W2162527210 @default.
- W2118947089 hasRelatedWork W2282901413 @default.
- W2118947089 hasRelatedWork W230391815 @default.
- W2118947089 hasRelatedWork W2754910083 @default.
- W2118947089 hasRelatedWork W3017265326 @default.
- W2118947089 hasRelatedWork W3098593001 @default.
- W2118947089 hasRelatedWork W3101722084 @default.
- W2118947089 hasRelatedWork W3102042388 @default.
- W2118947089 hasRelatedWork W3102985930 @default.
- W2118947089 hasRelatedWork W3104717070 @default.
- W2118947089 hasRelatedWork W3170177225 @default.
- W2118947089 isParatext "false" @default.
- W2118947089 isRetracted "false" @default.
- W2118947089 magId "2118947089" @default.
- W2118947089 workType "article" @default.