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arXiv 2402.18124astro-ph.COastro-ph.IMcs.LG
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基于人工神经网络的暗能量重构分析:在鲁宾天文台模拟Ia型超新星数据上的应用

Dark energy reconstruction analysis with artificial neural networks: Application on simulated Supernova Ia data from Rubin Observatory

National Center for Supercomputing Applications, University of Illinois Urbana-Champaign(伊利诺伊大学厄巴纳-香槟分校国家超级计算应用中心);University of Illinois at Urbana-Champaign(伊利诺伊大学厄巴纳-香槟分校);Kazakh-British Technical University(哈萨克-英国技术大学);Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México(墨西哥国立自治大学物理科学研究所);University of Geneva(日内瓦大学);University of Thessaly(塞萨利大学)

Ayan Mitra, Isidro Gómez-Vargas, Vasilios Zarikas

AI总结:

本研究基于LSST三年模拟Ia型超新星数据,构建结合遗传算法超参数调优与蒙特卡洛Dropout的人工神经网络暗能量重构模型,验证其与主流暗能量理论模型的一致性,为暗能量研究提供无模型依赖的分析方法。

摘要:

本文基于LSST(大口径全天巡视望远镜)模拟的三年期Ia型超新星(SNIa)数据,利用人工神经网络(ANN)重构方法,对SNIa的距离模数$μ(z)$与暗能量展开分析。本研究采用的ANN使用遗传算法进行超参数调优,并借助蒙特卡洛Dropout实现预测。该ANN重构架构能够根据给定的红移值,同时对距离模数及其对应的统计误差进行建模。我们将基于ANN的重构性能与$Λ$CDM、Chevallier-Linder-Polarski(CPL)这两个理论暗能量模型进行对比。针对这些理论模型,我们利用LSST模拟数据开展贝叶斯分析,并将其与Pantheon、Pantheon+ SNIa真实观测数据的分析结果进行比较。研究表明,我们的不依赖模型的ANN重构结果与两个理论模型均保持一致。性能指标与统计检验显示,ANN生成的距离模数估计值与LSST数据集吻合度较高,与$Λ$CDM和CPL模型仅存在微小差异。

英文摘要:

In this paper, we present an analysis of Supernova Ia (SNIa) distance moduli $μ(z)$ and dark energy using an Artificial Neural Network (ANN) reconstruction based on LSST simulated three-year SNIa data. The ANNs employed in this study utilize genetic algorithms for hyperparameter tuning and Monte Carlo Dropout for predictions. Our ANN reconstruction architecture is capable of modeling both the distance moduli and their associated statistical errors given redshift values. We compare the performance of the ANN-based reconstruction with two theoretical dark energy models: $Λ$CDM and Chevallier-Linder-Polarski (CPL). Bayesian analysis is conducted for these theoretical models using the LSST simulations and compared with observations from Pantheon and Pantheon+ SNIa real data. We demonstrate that our model-independent ANN reconstruction is consistent with both theoretical models. Performance metrics and statistical tests reveal that the ANN produces distance modulus estimates that align well with the LSST dataset and exhibit only minor discrepancies with $Λ$CDM and CPL.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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