Reionization optical depth determination from Planck HFI data with ten percent accuracy
Reionization optical depth determination from Planck HFI data with ten percent accuracy
复制标题
根据普朗克 HFI 数据确定再电离光学深度，精度为 10%
DOI：
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发表时间：
2019
影响因子：
6.5
通讯作者：
L. Vibert
中科院分区：
文献类型：
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作者：
L. Pagano;J. Delouis;S. Mottet;J. Puget;L. Vibert
我们通过对普朗克卫星上的高频仪器（HFI）数据的改进分析，提出了再电离光学深度τ的估计。通过使用改进版本的HFI地图制作代码，我们大大减少了影响数据的残余大规模污染，这些污染在普朗克2018遗留版本中有所体现，但并未完全消除。这导致偶极子畸变系统效应，污染极低的多极子，低于噪声水平。在大尺度偏振数据上，我们在68% C.L下测量τ = 0.0566−0.0062+0.0053，将普朗克2018遗留释放的不确定性降低了约40%。在ΛCDM模型中，结合普朗克大尺度温度似然，以及高温度和极化似然，我们测量到68% C.L处τ = 0.059±0.006，对应于68% C.L处的中点再电离红移zre = 8.14±0.61。这种再电离光学深度的估计精度为10%，是迄今为止最强的约束。
We present an estimation of the reionization optical depth τ from an improved analysis of data from the High Frequency Instrument (HFI) on board the Planck satellite. By using an improved version of the HFI map-making code, we greatly reduce the residual large-scale contamination affecting the data, characterised in, but not fully removed from, the Planck 2018 legacy release. This brings the dipole distortion systematic effect, contaminating the very low multipoles, below the noise level. On large-scale polarization-only data, we measure τ = 0.0566−0.0062+0.0053 at 68% C.L., reducing the Planck 2018 legacy release uncertainty by ∼40%. Within the ΛCDM model, in combination with the Planck large-scale temperature likelihood, and the high-ℓ temperature and polarization likelihood, we measure τ = 0.059 ± 0.006 at 68% C.L., which corresponds to a mid-point reionization redshift of zre = 8.14 ± 0.61 at 68% C.L. This estimation of the reionization optical depth with 10% accuracy is the strongest constraint to date.
影响因子：
8.7
作者：
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者：
Wright, E. L.
DOI：
10.17863/cam.43425
发表时间：
2016
期刊：
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影响因子：
--
作者：
Aghanim N
通讯作者：
Aghanim N