Aemulus ν: precision halo mass functions in wνCDM cosmologies

IF 5.3 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS
Delon Shen, Nickolas Kokron, Joseph DeRose, Jeremy Tinker, Risa H. Wechsler, Arka Banerjee and and the Aemulus collaboration
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Abstract

Precise and accurate predictions of the halo mass function for cluster mass scales in wνCDM cosmologies are crucial for extracting robust and unbiased cosmological information from upcoming galaxy cluster surveys. Here, we present a halo mass function emulator for cluster mass scales (≳ 1013M⊙/h) up to redshift z = 2 with comprehensive support for the parameter space of wνCDM cosmologies allowed by current data. Based on the Aemulusν suite of simulations, the emulator marks a significant improvement in the precision of halo mass function predictions by incorporating both massive neutrinos and non-standard dark energy equation of state models. This allows for accurate modeling of the cosmology dependence in large-scale structure and galaxy cluster studies. We show that the emulator, designed using Gaussian Process Regression, has negligible theoretical uncertainties compared to dominant sources of error in future cluster abundance studies. Our emulator is publicly available (https://github.com/DelonShen/aemulusnu_hmf), providing the community with a crucial tool for upcoming cosmological surveys such as LSST and Euclid.
暗物质宇宙学中的精确光晕质量函数
准确预测wνCDM宇宙学中星系团质量尺度的光晕质量函数对于从即将到来的星系团调查中提取可靠和公正的宇宙学信息至关重要。在这里,我们提出了一个光晕质量函数模拟器,适用于星团质量尺度(≥1013M⊙/h)到红移z = 2,全面支持wνCDM宇宙学的参数空间。在Aemulusν模拟套件的基础上,该仿真器通过结合大质量中微子和非标准暗能量状态方程模型,显著提高了光晕质量函数预测的精度。这使得在大尺度结构和星系团研究中对宇宙学依赖的精确建模成为可能。我们表明,与未来聚类丰度研究中的主要误差来源相比,使用高斯过程回归设计的仿真器具有可忽略不计的理论不确定性。我们的模拟器是公开的(https://github.com/DelonShen/aemulusnu_hmf),为社区提供了一个重要的工具,为即将到来的宇宙调查,如LSST和欧几里德。
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来源期刊
Journal of Cosmology and Astroparticle Physics
Journal of Cosmology and Astroparticle Physics 地学天文-天文与天体物理
CiteScore
10.20
自引率
23.40%
发文量
632
审稿时长
1 months
期刊介绍: Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.
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