论文标题
Erosita最终赤道深度调查中扩展源的X射线角功率谱
The X-ray Angular Power Spectrum of Extended Sources in the eROSITA Final Equatorial Depth Survey
论文作者
论文摘要
Erosita最终赤道深度调查（EFEDS），天空面积为140平方度，深度等同于最终的Erosita All-Sky调查的赤道贴片，代表了待办事项的最大连续性非X射线X射线场，使其成为测量脉动功率光谱的首要数据。在这项工作中，我们测量了EFEDS字段中星系簇和基团的X射线角功率谱。我们表明，测得的功率谱与过去的观察结果一致，包括Rosat All Sky Survey以及Chandra Cosmos和Bootes Fields。从Chandra观察结果校准的簇气晕模型的预测也与EFEDS功率谱相一致。尽管EFEDS没有足够大的天空覆盖范围来提供有意义的宇宙学限制，但我们预测，Erosita All-Sky Suppery（ERASS4）的X射线功率谱系（ERASS4）将在10％的水平上提供$ω_m$和$σ_8$的约束。
The eROSITA Final Equatorial Depth Survey (eFEDS), with a sky area of 140 square degrees with depth equivalent to the equatorial patch of the final eROSITA all-sky survey, represents the largest continuous non-full-sky X-ray fields to-date, making it the premier data set for measuring the angular power spectrum. In this work, we measure the X-ray angular power spectrum of galaxy clusters and groups in the eFEDS field. We show that the measured power spectrum is consistent with past observations, including the ROSAT All Sky Survey, and the Chandra COSMOS and Bootes fields. The predictions of cluster gas halo model that is calibrated from Chandra observations is also consistent with the eFEDS power spectrum. While the eFEDS does not have large enough sky coverage to provide meaningful cosmological constraints, we predict that the X-ray power spectrum from the cycle 4 of the eROSITA All-Sky Survey (eRASS4) will provide constraints on $Ω_M$ and $σ_8$ at the 10% level.
