含活动星系核反馈的Sunyaev-Zel'dovich功率谱模拟
摘要
我们探讨了辐射冷却、超新星反馈、宇宙射线以及一种新的活动星系核(AGN)高能反馈模型如何影响热学和动力学Sunyaev-Zel'dovich (SZ)功率谱。为此，我们使用了一套在大周期盒子中对宇宙网进行流体动力学TreePM-SPH模拟的套件，以及针对单个星系团定制的更高分辨率模拟。我们的AGN反馈模拟比先前的解析或数值方法更好地匹配了REXCESS X射线星系团样本的最新通用压力分布和团簇质量标度关系。对于多极矩，有增强反馈和无增强反馈的功率谱相似，表明该范围内的理论不确定性相对较小，尽管当前的解析和半解析方法高估了该SZ功率。我们发现ACT和SPT探测的高多极矩2000-10000范围内的功率对反馈方案敏感，因此可以约束星系团内气体理论，特别是对于高度不确定的红移。使用我们的AGN反馈谱，由原初宇宙微波背景功率推断的与使用ACT和SPT数据从解析SZ谱推断的之间明显的张力有所缓解。
引用
@article{arxiv.1003.4256,
title = {Simulations of the Sunyaev-Zel'dovich Power Spectrum with AGN Feedback},
author = {N. Battaglia and J. R. Bond and C. Pfrommer and J. L. Sievers and D. Sijacki},
journal= {arXiv preprint arXiv:1003.4256},
year = {2015}
}
备注
9 pages, 4 figures, 1 table. This modified version has been submitted to ApJ, expanding upon our original letter-size version, in response to comments we received. We have extended the discussion of our AGN energy input requirements; added kSZ power spectra; made MCMC comparisons with SPT data, shown in an extra figure, as well as the ACT data we originally used; added a few more references