The Second Peak: The Dark-Energy Density and the Cosmic Microwave Background
| dc.creator | Kamionkowski, Marc | |
| dc.creator | Buchalter, Ari | |
| dc.date | 2000-01-05 | |
| dc.date.accessioned | 2026-07-07T01:51:31Z | |
| dc.date.available | 2026-07-07T01:51:31Z | |
| dc.description | Supernova evidence for a negative-pressure dark energy (e.g., cosmological constant or quintessence) that contributes a fraction $Ω_Λ\simeq0.7$ of closure density has been bolstered by the discrepancy between the total density, $Ω_{\rm tot}\simeq1$, suggested by the location of the first peak in the cosmic microwave background (CMB) power spectrum and the nonrelativistic-matter density $Ω_m\simeq0.3$ obtained from dynamical measurements. Here we show that the impending identification of the location of the {\it second} peak in the CMB power spectrum will provide an immediate and independent probe of the dark-energy density. As an aside, we show how the measured height of the first peak probably already points toward a low matter density and places upper limits to the reionization optical depth and gravitational-wave amplitude. | |
| dc.description | 4 pages, 3 PostScript figures | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0001045 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0001045 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/322 | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | The Second Peak: The Dark-Energy Density and the Cosmic Microwave Background | |
| dc.type | text |