Large Angle CMB Fluctuations from Cosmic Strings with a Comological Constant
| dc.creator | Landriau, M. | |
| dc.creator | Shellard, E. P. S. | |
| dc.date | 2003-02-09 | |
| dc.date | 2003-09-19 | |
| dc.date.accessioned | 2026-07-07T11:29:04Z | |
| dc.date.available | 2026-07-07T11:29:04Z | |
| dc.description | In this paper, we present results for large-angle CMB anisotropies generated from high resolution simulations of cosmic string networks in a range of flat FRW universes with a cosmological constant. Using an ensemble of all-sky maps, we compare with the COBE data to infer a normalization (or upper bound) on the string linear energy density $μ$. For a flat matter-dominated model ($Ω_{M}=1$) we find $Gμ/c^2 \approx 0.7\times 10^{-6}$, which is lower than previous constraints probably because of the more accurate inclusion of string small-scale structure. For a cosmological constant within an observationally acceptable range, we find a relatively weak dependence with $Gμ/c^2$ less than 10% higher. | |
| dc.description | 5 pages, 5 figures; replaced with version to appear in Physical Review D | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0302166 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0302166 | |
| dc.identifier | Phys.Rev.D69:023003,2004 | |
| dc.identifier | doi:10.1103/PhysRevD.69.023003 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/196593 | |
| dc.subject | Astrophysics | |
| dc.title | Large Angle CMB Fluctuations from Cosmic Strings with a Comological Constant | |
| dc.type | text |