The Multipole Vectors of WMAP, and their frames and invariants
| dc.creator | Land, Kate | |
| dc.creator | Magueijo, Joao | |
| dc.date | 2005-02-28 | |
| dc.date.accessioned | 2026-07-07T11:03:50Z | |
| dc.date.available | 2026-07-07T11:03:50Z | |
| dc.description | We investigate the Statistical Isotropy and Gaussianity of the CMB fluctuations, using a set of multipole vector functions capable of separating these two issues. In general a multipole is broken into a frame and $2\ell-3$ ordered invariants. The multipole frame is found to be suitably sensitive to galactic cuts. We then apply our method to real WMAP datasets; a coadded masked map, the Internal Linear Combinations map, and Wiener filtered and cleaned maps. Taken as a whole, multipoles in the range $\ell=2-10$ or $\ell=2-20$ show consistency with statistical isotropy, as proved by the Kolmogorov test applied to the frame's Euler angles. This result in {\it not} inconsistent with previous claims for a preferred direction in the sky for $\ell=2,...5$. The multipole invariants also show overall consistency with Gaussianity apart from a few anomalies of limited significance (98%), listed at the end of this paper. | |
| dc.description | 9 pages. Submitted to MNRAS | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0502574 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0502574 | |
| dc.identifier | Mon.Not.Roy.Astron.Soc.362:838-846,2005 | |
| dc.identifier | doi:10.1111/j.1365-2966.2005.09310.x | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/188680 | |
| dc.subject | Astrophysics | |
| dc.title | The Multipole Vectors of WMAP, and their frames and invariants | |
| dc.type | text |