宇宙ブラックボディ放射のアニゾトロピー

D T Wilkinson

Science (New York, N.Y.)

|June 20, 1986

まとめ

宇宙マイクロ波の背景放射はビッグバン理論を支持するが,観測はまだ予測された原始密度の変動を検出していない. 初期の宇宙に欠けているこれらの印を理解するために,さらなる研究が必要である.

科学分野:

コスモロジー・コスモロジーとは
天体物理学天体物理学

背景:

2.75 Kの宇宙の熱放射線は,ビッグバンモデルの証拠を提供します.
この放射は,初期の宇宙に起源があり,宇宙学的モデルをテストするために使用することができます.

研究の目的:

宇宙マイクロ波背景放射 (CMB) のスペクトルと同otropyを調査する.
CMBにおける原始質量密度変動の印を検索する.

主な方法:

地上,気球,衛星のプラットフォームに配置された洗練されたマイクロ波放射測定器を使用しています.
CMBスペクトルとその大規模同otropyを分析する.

主要な成果:

CMBのスペクトルは,ブラックボディのスペクトルとほぼ一致しています (数パーセント以内).
CMB放射は高度に同極性 (0.01%まで) であり,私たちの運動に起因するわずかな二極性アニソトロピーがある.
推定される原始密度変動の統計的に有意な検出は,約10弧分程度の角度スケールでは行われていません.

結論:

現在の観測は,ビッグバン宇宙論と,CMBの性質に関する単純な理論的予測と一致しています.
検出された原始波動の欠如は,既存のモデルに挑戦を与え,さらなる調査を正当化します.

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