Looking for Cosmological Alfven Waves in WMAP Data
| dc.creator | Chen, Gang | |
| dc.creator | Mukherjee, Pia | |
| dc.creator | Kahniashvili, Tina | |
| dc.creator | Ratra, Bharat | |
| dc.creator | Wang, Yun | |
| dc.date | 2004-03-30 | |
| dc.date | 2004-04-27 | |
| dc.date.accessioned | 2026-07-07T11:29:22Z | |
| dc.date.available | 2026-07-07T11:29:22Z | |
| dc.description | A primordial cosmological magnetic field induces and supports vorticity or Alfven waves, which in turn generate cosmic microwave background (CMB) anisotropies. A homogeneous primordial magnetic field with fixed direction induces correlations between the $a_{l-1,m}$ and $a_{l+1,m}$ multipole coefficients of the CMB temperature anisotropy field. We discuss the constraints that can be placed on the strength of such a primordial magnetic field using CMB anisotropy data from the WMAP experiment. We place 3 $σ$ upper limits on the strength of the magnetic field of $B < 15$ nG for vector perturbation spectral index $n=-5$ and $B<1.7$ nG for $n=-7$. | |
| dc.description | 14 pages, 3 figures, minor changes, references added, ApJ, in press | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0403695 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0403695 | |
| dc.identifier | Astrophys.J.611:655-659,2004 | |
| dc.identifier | doi:10.1086/422213 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/196689 | |
| dc.subject | Astrophysics | |
| dc.title | Looking for Cosmological Alfven Waves in WMAP Data | |
| dc.type | text |