Gravitational energy as dark energy: Concordance of cosmological tests
| dc.creator | Leith, Ben M. | |
| dc.creator | Ng, S. C. Cindy | |
| dc.creator | Wiltshire, David L. | |
| dc.date | 2007-09-17 | |
| dc.date | 2007-11-21 | |
| dc.date.accessioned | 2026-07-07T11:19:22Z | |
| dc.date.available | 2026-07-07T11:19:22Z | |
| dc.description | We provide preliminary quantitative evidence that a new solution to averaging the observed inhomogeneous structure of matter in the universe [gr-qc/0702082, arxiv:0709.0732], may lead to an observationally viable cosmology without exotic dark energy. We find parameters which simultaneously satisfy three independent tests: the match to the angular scale of the sound horizon detected in the cosmic microwave background anisotropy spectrum; the effective comoving baryon acoustic oscillation scale detected in galaxy clustering statistics; and type Ia supernova luminosity distances. Independently of the supernova data, concordance is obtained for a value of the Hubble constant which agrees with the measurement of the Hubble Key team of Sandage et al [astro-ph/0603647]. Best-fit parameters include a global average Hubble constant H_0 = 61.7 (+1.2/-1.1) km/s/Mpc, a present epoch void volume fraction of f_{v0} = 0.76 (+0.12/-0.09), and an age of the universe of 14.7 (+0.7/-0.5) billion years as measured by observers in galaxies. The mass ratio of non-baryonic dark matter to baryonic matter is 3.1 (+2.5/-2.4), computed with a baryon-to-photon ratio that concords with primordial lithium abundances. | |
| dc.description | 4 pages, 2 figures; v2 improved statistics, references added, to appear in ApJ Letters | |
| dc.identifier | https://arxiv.org/abs/0709.2535 | |
| dc.identifier | http://arxiv.org/abs/0709.2535 | |
| dc.identifier | Astrophys.J.672:L91-L94,2008 | |
| dc.identifier | doi:10.1086/527034 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/193658 | |
| dc.subject | Astrophysics | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Gravitational energy as dark energy: Concordance of cosmological tests | |
| dc.type | text |