Gauge Theory and the Early Universe (Paperback, Softcover reprint of the original 1st ed. 1988)

P. de Bernardis, S. Masi , G. Moreno Dipartimento di Fisica, Universita' "La Sapienza" 00184 Roma Italy ABSTRACT. Anisotropy measurement techniques and results are reviewed, with special attention given to experimental problems. The cosmological relevance of the dipole anisotropy, the only anisotropy truly detected in the Cosmic Background Radiation, is discussed. 1. INTRODUCTION Anisotropy of the Cosmic Background Radiation at 2.7 K (CBR hereafter) is a cosmological topic with a wide range of applications. In order to define anisotropy let us consider fig. 1 a, where the celestial sphere is shown with two beams A and B, with beamwidth 0 and angular separation e. We define the anisotropy of CBR at angular scale e in terms of the difference i'2,1 between the CBR flux I(ex,u) measured in the two beams. At small angular scales (e ) a "stochastic" approach is preferred, and the anisotropy is defined as .cJ I = GBP (1) I e where the brackets indicate averages over the whole celestial sphere. At large angular scales e>l a deterministic approach is preferred, and the CBR flux I(ex, S) is expressed as a sum of spherical harmonics (2) I (ex, S) = I ~ aIm Y (ex, S) lm I,m The alm coefficients give the dipole, quadrupole and higher order components of the anisotropy. 257 P. Galeotti and D. N. Schramm (eds.), Gauge Theory and the Early Universe, 257-282.

General

Imprint:	Springer
Country of origin:	Netherlands
Series:	NATO Science Series C, 248
Release date:	October 2011
First published:	1988
Editors:	P. Galeotti • David N. Schramm
Dimensions:	235 x 155 x 20mm (L x W x T)
Format:	Paperback
Pages:	388
Edition:	Softcover reprint of the original 1st ed. 1988
ISBN-13:	978-9401078764
Categories:	Books > Science & Mathematics > Physics > Atomic & molecular physics Books > Science & Mathematics > Physics > Relativity physics > General Books > Science & Mathematics > Physics > Applied physics & special topics > Astrophysics Promotions
LSN:	9401078769
Barcode:	9789401078764

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