论文标题

骆驼模拟中的圆形介质:对未来Sunyaev-Zeldovich观察的反馈过程的预测约束

The Circumgalactic Medium from the CAMELS Simulations: Forecasting Constraints on Feedback Processes from Future Sunyaev-Zeldovich Observations

论文作者

Moser, Emily, Battaglia, Nicholas, Nagai, Daisuke, Lau, Erwin, Valle, Luis Fernando Machado Poletti, Villaescusa-Navarro, Francisco, Amodeo, Stefania, Angles-Alcazar, Daniel, Bryan, Greg L., Dave, Romeel, Hernquist, Lars, Vogelsberger, Mark

论文摘要

在星系形成和进化的背景下,通过伴生培养基(CGM)的重子循环很重要。在这项研究中,我们预测对反馈过程的限制,将CGM与当前和未来的Sunyaev-Zeldovich(SZ)观察加热。为了限制这些过程,我们使用机器学习模拟(骆驼)(骆驼)的宇宙学模拟,宇宙学和天体物理学的套件,它们改变了两个先前现有的流体动力学模拟的四个不同的反馈参数,即Illaboristng和Simba。我们使用模拟器捕获了SZ径向概况对这些反馈参数的依赖性,计算其衍生物,并从即将到来的实验中对这些反馈参数的预测将来的约束。我们发现,对于Simons天文台观察到的类似DESI的(暗能量光谱仪器)的星系样品,所有四个反馈参数都能够受到限制(其中一些参数在$ 10 \%$级别之内),这表明将来的观察结果将能够进一步限制这些子网格模型的参数空间。鉴于这项工作中建模的星系样品和预测的误差,我们发现内部SZ轮廓比外部轮廓更大。最后,我们发现,尽管骆驼模拟套件中的AGN反馈参数变化很大,但我们无法重现由Atacama Cosmology望远镜测量的Baryon振荡光谱调查选择的星系的TSZ信号。

The cycle of baryons through the circumgalactic medium (CGM) is important to understand in the context of galaxy formation and evolution. In this study we forecast constraints on the feedback processes heating the CGM with current and future Sunyaev-Zeldovich (SZ) observations. To constrain these processes, we use a suite of cosmological simulations, the Cosmology and Astrophysics with MachinE Learning Simulations (CAMELS), that varies four different feedback parameters of two previously existing hydrodynamical simulations, IllustrisTNG and SIMBA. We capture the dependencies of SZ radial profiles on these feedback parameters with an emulator, calculate their derivatives, and forecast future constraints on these feedback parameters from upcoming experiments. We find that for a DESI-like (Dark Energy Spectroscopic Instrument) galaxy sample observed by the Simons Observatory all four feedback parameters are able to be constrained (some within the $10\%$ level), indicating that future observations will be able to further restrict the parameter space for these sub-grid models. Given the modeled galaxy sample and forecasted errors in this work, we find that the inner SZ profiles contribute more to the constraining power than the outer profiles. Finally, we find that, despite the wide range of AGN feedback parameter variation in the CAMELS simulation suite, we cannot reproduce the tSZ signal of galaxies selected by the Baryon Oscillation Spectroscopic Survey as measured by the Atacama Cosmology Telescope.

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