Cubic anomalies in WMAP
| dc.creator | Land, Kate | |
| dc.creator | Magueijo, Joao | |
| dc.date | 2004-05-26 | |
| dc.date | 2005-05-20 | |
| dc.date.accessioned | 2026-07-07T10:27:13Z | |
| dc.date.available | 2026-07-07T10:27:13Z | |
| dc.description | We perform a frequentist analysis of the bispectrum of WMAP first year data. We find clear signal domination up to l=200, with overall consistency with Gaussianity except for the following features. There is a flat patch (i.e. a low chi-squared region) in the same-l components of the bispectrum spanning the range l=32-62; this may be interpreted as ruling out Gaussianity at the 99.6% confidence level. There is also an asymmetry between the North and South inter-l bispectrum components at the 99% confidence level. The preferred asymmetry axis correlates well with the (l,b)=(57,10) direction quoted in the literature for asymmetries in the power spectrum and three-point correlation function. However our analysis of the quadrupole (its bispectrum and principal axes) fail to make contact with previously claimed anomalies. | |
| dc.description | 10 pages, 9 figures. Minor edits to match MNRAS version | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0405519 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0405519 | |
| dc.identifier | Mon.Not.Roy.Astron.Soc.357:994-1002,2005 | |
| dc.identifier | doi:10.1111/j.1365-2966.2005.08707.x/abs/ | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177088 | |
| dc.subject | Astrophysics | |
| dc.title | Cubic anomalies in WMAP | |
| dc.type | text |