The Circumgalactic Medium from the CAMELS Simulations: Forecasting Constraints on Feedback Processes from Future Sunyaev–Zeldovich Observations
The Circumgalactic Medium from the CAMELS Simulations: Forecasting Constraints on Feedback Processes from Future Sunyaev–Zeldovich Observations
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DOI：
10.3847/1538-4357/ac70c6
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发表时间：
2022-01
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通讯作者：
E. Moser;N. Battaglia;D. Nagai;E. Lau;Luis Fernando Machado Poletti Valle;F. Villaescusa-Navarro;S. Amodeo;D. Anglés-Alcázar;G. Bryan;R. Davé;L. Hernquist;M. Vogelsberger
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作者：
E. Moser;N. Battaglia;D. Nagai;E. Lau;Luis Fernando Machado Poletti Valle;F. Villaescusa-Navarro;S. Amodeo;D. Anglés-Alcázar;G. Bryan;R. Davé;L. Hernquist;M. Vogelsberger
在星系形成和演化的背景下，理解重子通过环星系介质（CGM）的循环是很重要的。在这项研究中，我们预测的反馈过程加热CGM与当前和未来的Sunyaev-Zeldovich（SZ）的观测约束。为了约束这些过程，我们使用了一套宇宙学模拟，宇宙学和天体物理学与机器学习模拟（CAMELS）。CAMELS改变了两个以前存在的流体动力学模拟，IllustrisTNG和SIMBA四个不同的反馈参数。我们捕捉SZ径向轮廓的依赖性，这些反馈参数与仿真器，计算其衍生物，并预测未来的约束，这些反馈参数从即将到来的实验。我们发现，对于一个类似于西蒙斯天文台的暗能量光谱仪所获得的星系样本，所有四个反馈参数都可以被约束（有些在10%的水平内），这表明未来的观测将能够进一步限制这些亚网格模型的参数空间。考虑到模拟的星系样本和预测误差，我们发现内部SZ配置文件比外部配置文件对约束功率的贡献更大。最后，我们发现，尽管在CAMELS模拟套件中的活动星系反馈的参数变化范围很广，我们不能再现的热SZ信号的星系所选择的重子振荡光谱调查测量的阿塔卡马宇宙学望远镜。
It is important to understand the cycle of baryons through the circumgalactic medium (CGM) 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). CAMELS varies four different feedback parameters of two previously existing hydrodynamical simulations, IllustrisTNG and SIMBA. We capture the dependences 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 galaxy sample similar to what would be obtained with the Dark Energy Spectroscopic Instrument at the Simons Observatory, all four feedback parameters can be constrained (some within the 10% level), indicating that future observations will be able to further restrict the parameter space for these subgrid 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 parameter variation in active galactic feedback in the CAMELS simulation suite, we cannot reproduce the thermal SZ signal of galaxies selected by the Baryon Oscillation Spectroscopic Survey as measured by the Atacama Cosmology Telescope.