Detection of Anisotropy in the Cosmic Blackbody Radiation
Detection of Anisotropy in the Cosmic Blackbody Radiation
复制标题
宇宙黑体辐射各向异性的检测
DOI：
10.1103/physrevlett.39.898
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发表时间：
1977
影响因子：
8.6
通讯作者：
R. Muller
中科院分区：
文献类型：
--
作者：
G. Smoot;M. Gorenstein;R. Muller
一台33 GHz(0.9厘米)的双天线Dicke辐射计搭载在U-2飞机上飞到了20公里的高度，探测到了宇宙黑体辐射的各向异性。在分布在北半球三分之二的地区的资料中，观测到了一种各向异性，这种各向异性与一次球面调和很好地吻合，其振幅为(3.5加或负0.6)×10到-3度K，方向为11.0正或负0.6小时的右纬和6正或负10度的赤纬。这种观测很容易被解释为由于地球相对于辐射的运动，辐射的速度为390正负60公里/秒。
Anisotropy has been detected in the cosmic blackbody radiation with a 33-GHz (0.9 cm) twin-antenna Dicke radiometer flown to an altitude of 20 km aboard a U-2 aircraft. In data distributed over two-thirds of the Northern Hemisphere, an anisotropy is observed, which is well fitted by a first-order spherical harmonic with an amplitude of (3.5 plus or minus 0.6) x 10 to the -3rd deg K, and direction 11.0 plus or minus 0.6 h right ascension and 6 plus or minus 10 deg declination. This observation is readily interpreted as due to motion of the earth relative to the radiation with a velocity of 390 plus or minus 60 km/sec.