The cosmic microwave background spectrum from the full COBE FIRAS data set

被引：1330

作者：

Fixsen, DJ

Cheng, ES

Gales, JM

Mather, JC

Shafer, RA

Wright, EL

机构：

[1] UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90095

[2] UNIV CALIF LOS ANGELES,DEPT ASTRON,LOS ANGELES,CA 90095

来源：

ASTROPHYSICAL JOURNAL | 1996年 / 473卷 / 02期

关键词：

cosmic microwave background; cosmology; observations;

D O I：

10.1086/178173

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have refined the analysis of the data from the FIRAS (Far-InfraRed Absolute Spectrophotometer) on board the COBE (COsmic Background Explorer). The FIRAS measures the difference between the cosmic microwave background and a precise blackbody spectrum. We find new, tighter upper limits on general deviations from a blackbody spectrum. The rms deviations are less than 50 parts per million of the peak of the cosmic microwave background radiation. For the Comptonization and chemical potential we find \y\ < 15 x 10(-6) and \mu\ < 9 x 10(-5) (95% confidence level [CL]). There are also refinements in the absolute temperature, 2.728 +/- 0.004 K (95% CL), the dipole direction, (l, b) = (264.14 degrees +/- 0.30, 48.26 degrees +/- 0.30) (95% CL), and the amplitude, 3.372 +/- 0.014 mK (95% CL). All of these results agree with our previous publications.

引用

页码：576 / 587

页数：12

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