星系间介质在3.9≤z≤4.3时的热历史

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2023-04-11 DOI:10.1017/pasa.2023.22

T. Ondro, R. Gális

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引用次数: 0

摘要

提出了一种新的测定$3.9 \leq z \leq 4.3$上星系间介质(IGM)温度的方法。我们将曲率方法应用于VLT/ESO上的10个高分辨率类星体光谱样本的紫外和视觉梯队光谱仪。我们通过确定特征过密度的温度来测量平均密度下的温度，这是绝对曲率的紧密函数，与$\unicode{x03B3}$无关。假设基准值为$\unicode{x03B3} = 1.4$，我们分别确定了红移范围为$3.9 \leq z \leq 4.1$和$4.1 \leq z \leq 4.3$的平均密度温度值$T_{0} = 7893^{+1417}_{-1226}$ K和$T_{0} = 8153^{+1224}_{-993}$ K。尽管结果显示在研究的红移范围内没有强烈的温度演化，但我们的测量结果与包括He ii再电离贡献的IGM热历史一致。

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The thermal history of the intergalactic medium at 3.9 ≤ z ≤ 4.3

Abstract A new determination of the temperature of the intergalactic medium (IGM) over $3.9 \leq z \leq 4.3$ is presented. We applied the curvature method on a sample of 10 high-resolution quasar spectra from the Ultraviolet and Visual Echelle Spectrograph on the VLT/ESO. We measured the temperature at mean density by determining the temperature at the characteristic overdensity, which is tight function of the absolute curvature irrespective of $\unicode{x03B3}$ . Under the assumption of fiducial value of $\unicode{x03B3} = 1.4$ , we determined the values of temperatures at mean density $T_{0} = 7893^{+1417}_{-1226}$ K and $T_{0} = 8153^{+1224}_{-993}$ K for redshift range of $3.9 \leq z \leq 4.1$ and $4.1 \leq z \leq 4.3$ , respectively. Even though the results show no strong temperature evolution over the studied redshift range, our measurements are consistent with an IGM thermal history that includes a contribution from He ii reionisation.

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.