arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1701.09020astro-ph.CO
收藏

tSZ效应相对论修正的高显著性检测

High significance detection of the tSZ effect relativistic corrections

G. Hurier

摘要:

热Sunyaev-Zel'dovich(tSZ)效应是由宇宙微波背景(CMB)光子与星系团内沿视线方向积分的热(几keV)扩散电子气体相互作用产生的。这种效应使CMB黑体辐射定律发生畸变。这种畸变规律通过所谓的tSZ相对论修正依赖于团簇内热气体$T_{e}$的电子温度。在这项工作中,我们进行了统计分析的tSZ光谱畸变的大星系团样本。我们进行了堆叠分析的几个电子温度箱,使用光谱测量的X射线温度和X射线光度和电子温度之间的比例关系。我们报告的第一个高显着性检测的相对论tSZ的显着性为5.3 $σ$。我们还表明,所观察到的tSZ相对论修正与X射线推导的温度是一致的。对tSZ光谱定律的测量表明,tSZ效应的光谱畸变可以作为测量星系团温度的探针。

英文摘要:

The thermal Sunyaev-Zel'dovich (tSZ) effect is produced by the interaction of cosmic microwave background (CMB) photons with the hot (a few keV) and diffuse gas of electrons inside galaxy clusters integrated along the line of sight. This effect produces a distortion of CMB blackbody emission law. This distortion law depends on the electronic temperature of the intra-cluster hot gas, $T_{e}$, through the so-called tSZ relativistic corrections. In this work, we have performed a statistical analysis of the tSZ spectral distortion on large galaxy cluster samples. We performed a stacking analysis for several electronic temperature bins, using both spectroscopic measurements of X-ray temperatures and a scaling relation between X-ray luminosities and electronic temperatures. We report the first high significance detection of the relativistic tSZ at a significance of 5.3 $σ$. We also demonstrate that the observed tSZ relativistic corrections are consistent with X-ray deduced temperatures. This measurement of the tSZ spectral law demonstrates that tSZ effect spectral distorsion can be used as a probe to measure galaxy cluster temperatures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑