MEASUREMENTS OF THE COSMIC MICROWAVE BACKGROUND TEMPERATURE AT 1.47 GHZ

被引：30

作者：

BENSADOUN, M

BERSANELLI, M

DEAMICI, G

KOGUT, A

LEVIN, SM

LIMON, M

SMOOT, GF

WITEBSKY, C

机构：

[1] NASA,GODDARD SPACE FLIGHT CTR,UNIV SPACE RES ASSOC,GREENBELT,MD 20771

[2] LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

[3] CNR,IST FIS COSM,I-20133 MILAN,ITALY

来源：

ASTROPHYSICAL JOURNAL | 1993年 / 409卷 / 01期

关键词：

COSMIC MICROWAVE BACKGROUND; COSMOLOGY; OBSERVATIONS;

D O I：

10.1086/172637

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have used a radio-frequency-gain total-power radiometer to measure the intensity of the cosmic microwave background (CMB) at a frequency of 1.47 GHz (20.4 cm wavelength) from White Mountain, California in 1988 September and from the South Pole, Antarctica in 1989 December. The CMB thermodynamic temperature, T(CMB), is 2.27 +/- 0.25 K (68% confidence limit) measured from White Mountain and 2.26 +/- 0.20 K from the South Pole site. The combined result is 2.26 +/- 0.19 K. The correction for Galactic emission has been derived from scaled low-frequency maps and constitutes the main source of error. The atmospheric signal is extrapolated from our zenith scan measurements at higher frequencies. These results are consistent with our previous measurement at 1.41 GHz (Levin et al. 1988) and approximately 2.5 sigma from the 2.74 +/- 0.01 K global average CMB temperature.

引用

页码：1 / 13

页数：13

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