Intrinsic Bispectra of Cosmic Magnetic Fields

Дата и время публикации : 2010-12-13T21:49:50Z

Авторы публикации и институты :
Iain A. Brown

Ссылка на журнал-издание: ApJ 733, 83 (2011)
Коментарии к cтатье: 31 pages, 13 figures, AASTeX. Replaced with version accepted by ApJ; brief discussion and references added to introduction, discussion at end of paper rephrased and extended, some typos corrected
Первичная категория: astro-ph.CO

Все категории : astro-ph.CO

Краткий обзор статьи: Forthcoming datasets from the Planck experiment and others are in a position to probe the CMB non-Gaussianity with higher accuracy than has yet been possible and potentially open a new window into the physics of the very early universe. However, a signal need not necessarily be inflationary in origin, and possible contaminants should be examined in detail. One such is provided by early universe magnetic fields, which can be produced by a variety of models including during an inflationary phase, at phase transitions, or seeded by cosmic defects. Should such fields have been extent in the early universe they provide a natural source of CMB non-Gaussianity. Knowledge of the CMB angular bispectrum requires the complete Fourier-space (or "intrinsic") bispectrum. In this paper I consider in detail the intrinsic bispectra of an early-universe magnetic field for a range of power-law magnetic power spectra.

Category: Physics