Concerning the connection between the Cl power spectrum of the cosmic microwave background and the Γm Fourier spectrum of rings on the sky

被引：4

作者：

Ansari, R

Bargot, S

Bourrachot, A

Couchot, F

Haïssinski, J

Henrot-Versillé, S

Le Meur, G

Perdereau, O

Piat, M

Plaszczynski, S

Touze, F

机构：

[1] IN2P3 CNRS, Lab Accelerateur Lineaire, F-91898 Orsay, France

[2] Univ Paris 11, F-91898 Orsay, France

[3] INSU CNRS, Inst Astrophys Spatiale, F-91405 Orsay, France

[4] Univ Paris 11, F-91405 Orsay, France

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2003年 / 343卷 / 02期

关键词：

cosmic microwave background;

D O I：

10.1046/j.1365-8711.2003.06694.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this article we present and study a scaling law of the m Gamma (m) cosmic microwave background Fourier spectrum on rings that allows us to (i) combine spectra corresponding to different colatitude angles (e.g. several detectors at the focal plane of a telescope) and (ii) recover the C (l) power spectrum once the Gamma (m) coefficients have been measured. This recovery is performed numerically below the 1 per cent level for colatitudes Theta > 80degrees. In addition, taking advantage of the smoothness of C (l) and of Gamma (m) , we provide analytical expressions that allow the recovery of one of the spectra at the 1 per cent level, the other one being known.

引用

页码：552 / 558

页数：7

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