CONSTRAINTS ON THE HIGH-ℓ POWER SPECTRUM OF MILLIMETER-WAVE ANISOTROPIES FROM APEX-SZ

CONSTRAINTS ON THE HIGH-ℓ POWER SPECTRUM OF MILLIMETER-WAVE ANISOTROPIES FROM APEX-SZ
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APEX-SZ 毫米波各向异性高功率谱的约束

DOI:
10.1088/0004-637x/701/2/1958
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发表时间:
1958
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
Reichardt
Reichardt
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--
文献类型:
--
作者:
Reichardt

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本文介绍用APEX-SZ仪器测量毫米波各向异性的角功率谱。APEX-SZ以150 GHz的频率绘制了0.8 ° 2的天空图,角分辨率为1“。这些新的测量结果显著改善了在150 GHz角多极子3000<λ < 10,000范围内对各向异性功率的限制,将平带功率中的总天文信号限制在95%CL下小于105 μ K2。我们预计亚毫米明亮,尘埃星系和次级宇宙微波背景各向异性在较小程度上从Sunyaev-Zel 'dovich效应(SZE)显着有助于观察到的功率。减去σ 8= 0.8时的SZE功率谱并遮蔽亮源,剩余功率的最佳拟合值为C = 1.1+ 0.9− 0.8× 10− 5 μK 2(1.7+ 1.4− 1.3 Jy 2 sr− 1)。这与模型预测的亚毫米明亮的尘埃星系的能量吻合得很好。将该功率与BLAST在600 GHz处检测到的功率进行比较,我们发现源通量的频率依赖性为:
We present measurements of the angular power spectrum of millimeter wave anisotropies with the APEX-SZ instrument. APEX-SZ has mapped 0.8 deg 2 of sky at a frequency of 150 GHz with an angular resolution of 1'. These new measurements significantly improve the constraints on anisotropy power at 150 GHz over the range of angular multipoles 3000< ℓ< 10, 000, limiting the total astronomical signal in a flat band power to be less than 105 μK 2 at 95% CL. We expect both submillimeter-bright, dusty galaxies and to a lesser extent secondary cosmic microwave background anisotropies from the Sunyaev–Zel'dovich effect (SZE) to significantly contribute to the observed power. Subtracting the SZE power spectrum expected for σ 8= 0.8 and masking bright sources, the best-fit value for the remaining power is C ℓ= 1.1+ 0.9− 0.8× 10− 5 μK 2 (1.7+ 1.4− 1.3 Jy 2 sr− 1). This agrees well with model predictions for power due to submillimeter-bright, dusty galaxies. Comparing this power to the power detected by BLAST at 600 GHz, we find the frequency dependence of the source fluxes to be
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