ON DETERMINING THE SPECTRUM OF PRIMORDIAL INHOMOGENEITY FROM THE COBE DMR SKY MAPS - RESULTS OF 2-YEAR DATA-ANALYSIS

被引：159

作者：

GORSKI, KM

HINSHAW, G

BANDAY, AJ

BENNETT, CL

WRIGHT, EL

KOGUT, A

SMOOT, GF

LUBIN, P

机构：

[1] Universities Space Res. Association, NASA/Goddard Space Flight Center, Code 685.3, Greenbelt

[2] Warsaw University Observatory, 00-478 Warszawa

[3] Hughes STX Corporation, Lanham, MD 20706

[4] NASA Goddard Space Flight Center, Code 685, Greenbelt

[5] UCLA Astronomy Department, Los Angeles

[6] LBL, Bldg. 50-351, University of California, Berkeley

[7] UCSB Physics Department, Santa Barbara

来源：

ASTROPHYSICAL JOURNAL | 1994年 / 430卷 / 02期

关键词：

COSMIC MICROWAVE BACKGROUND; COSMOLOGY; OBSERVATIONS;

D O I：

10.1086/187445

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A new technique of Fourier analysis on a cut sky has been applied to the two-year COBE DMR 53 and 90 GHz sky maps. The Bayesian power spectrum estimation results are consistent with the Harrison-Zel'dovich n = 1 model. The maximum likelihood estimates of the usual parameters defining the power spectrum of primordial perturbations are n = 1.22 (1.02) and Q(rms-PS) = 17 (20) muK including (excluding) the quadrupole. A spectral-index-independent normalization is naturally expressed for the two-year maps in terms of the multipole amplitude a9 = 8.2 (8.3) muK (to approximately 12 sigma significance). The marginal likelihood function on n obtained by integration with respect to a9 renders n = 1.17 +/- 0.31 (0.96 +/- 0.36).

引用

页码：L89 / L92

页数：4

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