FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3100494829> ?p ?o ?g. }

• W3100494829 endingPage "A51" @default.
• W3100494829 startingPage "A51" @default.
• W3100494829 abstract "Context. Standard cosmological N -body simulations have background scale factor evolution that is decoupled from non-linear structure formation. Prior to gravitational collapse, kinematical backreaction ( Q D ) justifies this approach in a Newtonian context. Aims. However, the final stages of a gravitational collapse event are sudden; a globally imposed smooth expansion rate forces at least one expanding region to suddenly and instantaneously decelerate in compensation for the virialisation event. This is relativistically unrealistic. A more conservative hypothesis is to allow non-collapsed domains to continue their volume evolution according to the Q D Zel’dovich approximation (QZA). We aim to study the inferred average expansion under this “silent” virialisation hypothesis. Methods. We set standard ( MPGRAFIC ) EdS 3-torus (T 3 ) cosmological N -body initial conditions. Using RAMSES , we partitioned the volume into domains and called the DTFE library to estimate the per-domain initial values of the three invariants of the extrinsic curvature tensor that determine the QZA. We integrated the Raychaudhuri equation in each domain using the INHOMOG library, and adopted the stable clustering hypothesis to represent virialisation (VQZA). We spatially averaged to obtain the effective global scale factor. We adopted an early-epoch–normalised EdS reference-model Hubble constant H 1 EDS = 37.7km s -1 ∕Mpc and an effective Hubble constant H eff,0 = 67.7km s -1 ∕Mpc. Results. From 2000 simulations at resolution 256 3 , we find that reaching a unity effective scale factor at 13.8 Gyr (16% above EdS), occurs for an averaging scale of L 13.8 = 2.5 −0.4 +0.1 Mpc∕ h eff . Relativistically interpreted, this corresponds to strong average negative curvature evolution, with the mean (median) curvature functional Ω R D growing from zero to about 1.5–2 by the present. Over 100 realisations, the virialisation fraction and super-EdS expansion correlate strongly at fixed cosmological time. Conclusions. Thus, starting from EdS initial conditions and averaging on a typical non-linear structure formation scale, the VQZA dark-energy–free average expansion matches Λ CDM expansion to first order. The software packages used here are free-licensed." @default.
• W3100494829 created "2020-11-23" @default.
• W3100494829 creator A5042288921 @default.
• W3100494829 date "2018-02-01" @default.
• W3100494829 modified "2023-10-18" @default.
• W3100494829 title "Replacing dark energy by silent virialisation" @default.
• W3100494829 cites W1619199405 @default.
• W3100494829 cites W1660985986 @default.
• W3100494829 cites W1672159676 @default.
• W3100494829 cites W1809492446 @default.
• W3100494829 cites W1852681284 @default.
• W3100494829 cites W1880687005 @default.
• W3100494829 cites W1900346355 @default.
• W3100494829 cites W1967019091 @default.
• W3100494829 cites W1973067131 @default.
• W3100494829 cites W1973240083 @default.
• W3100494829 cites W1979156105 @default.
• W3100494829 cites W1983013645 @default.
• W3100494829 cites W1984927927 @default.
• W3100494829 cites W1985419170 @default.
• W3100494829 cites W1994167301 @default.
• W3100494829 cites W1998577648 @default.
• W3100494829 cites W2001305482 @default.
• W3100494829 cites W2003792694 @default.
• W3100494829 cites W2006224243 @default.
• W3100494829 cites W2007619196 @default.
• W3100494829 cites W2007776260 @default.
• W3100494829 cites W2016684027 @default.
• W3100494829 cites W2016825074 @default.
• W3100494829 cites W2024087644 @default.
• W3100494829 cites W2028627273 @default.
• W3100494829 cites W2029017604 @default.
• W3100494829 cites W2030250842 @default.
• W3100494829 cites W2031237793 @default.
• W3100494829 cites W2033900115 @default.
• W3100494829 cites W2039165171 @default.
• W3100494829 cites W2040202279 @default.
• W3100494829 cites W2042524186 @default.
• W3100494829 cites W2044206065 @default.
• W3100494829 cites W2044935619 @default.
• W3100494829 cites W2052859518 @default.
• W3100494829 cites W2055558232 @default.
• W3100494829 cites W2057552478 @default.
• W3100494829 cites W2060222066 @default.
• W3100494829 cites W2064230241 @default.
• W3100494829 cites W2064518347 @default.
• W3100494829 cites W2069251437 @default.
• W3100494829 cites W2071400603 @default.
• W3100494829 cites W2073699788 @default.
• W3100494829 cites W2084245951 @default.
• W3100494829 cites W2091854031 @default.
• W3100494829 cites W2099263196 @default.
• W3100494829 cites W2121863566 @default.
• W3100494829 cites W2123476919 @default.
• W3100494829 cites W2124746385 @default.
• W3100494829 cites W2125723551 @default.
• W3100494829 cites W2127759739 @default.
• W3100494829 cites W2129119343 @default.
• W3100494829 cites W2129362056 @default.
• W3100494829 cites W2129899349 @default.
• W3100494829 cites W2129969426 @default.
• W3100494829 cites W2142972436 @default.
• W3100494829 cites W2150372924 @default.
• W3100494829 cites W2156647001 @default.
• W3100494829 cites W2161689241 @default.
• W3100494829 cites W2163540027 @default.
• W3100494829 cites W2163930527 @default.
• W3100494829 cites W2166967850 @default.
• W3100494829 cites W2167530145 @default.
• W3100494829 cites W2169866137 @default.
• W3100494829 cites W2171023349 @default.
• W3100494829 cites W2203444110 @default.
• W3100494829 cites W2248514403 @default.
• W3100494829 cites W2480719841 @default.
• W3100494829 cites W2506013473 @default.
• W3100494829 cites W2509446124 @default.
• W3100494829 cites W2511477755 @default.
• W3100494829 cites W2551907951 @default.
• W3100494829 cites W2561866848 @default.
• W3100494829 cites W2562273147 @default.
• W3100494829 cites W2618660830 @default.
• W3100494829 cites W2764020338 @default.
• W3100494829 cites W2770614621 @default.
• W3100494829 cites W2951207872 @default.
• W3100494829 cites W2964111054 @default.
• W3100494829 cites W3021615542 @default.
• W3100494829 cites W3022439517 @default.
• W3100494829 cites W3098338485 @default.
• W3100494829 cites W3099525618 @default.
• W3100494829 cites W3101226085 @default.
• W3100494829 cites W3101488830 @default.
• W3100494829 cites W3102701096 @default.
• W3100494829 cites W3102824344 @default.
• W3100494829 cites W3103134011 @default.
• W3100494829 cites W3104045376 @default.
• W3100494829 cites W3104535404 @default.
• W3100494829 cites W3105517354 @default.
• W3100494829 cites W3105807893 @default.

• next