用神经网络加速双星模型计算,速度提升万倍且误差极小。
The Eclipsing Binaries via Artificial Intelligence. II. Need for Speed in PHOEBE Forward Models
- 构建六层512节点神经网络,替代传统耗时模拟。
- 计算速度提升超10000倍,系统误差低于1%。
- 适合需要快速分析大量双星数据的研究者。
现代天文学数据量激增,手动分析已难以应对,亟需人工智能技术辅助。以食双星(EBs)建模软件PHOEBE为例,其正向模型生成耗时严重制约大规模参数分析。本文训练了一个全连接前馈神经网络(ANN),基于超过一百万条由PHOEBE生成的合成光变曲线。优化后的模型包含六层隐藏层,每层512个节点,在精度与复杂度间取得平衡。通过大量测试,我们确定了该网络的应用边界,并量化了使用中的系统误差与统计误差。结果表明,稀释效应在参数估计中至关重要,需在AI模型中予以考虑。该框架相较传统方法实现超四数量级的速度提升,系统误差不超过1%,多数情况低于0.01%,覆盖整个参数空间。
原文摘要 · Abstract (English)
In modern astronomy, the quantity of data collected has vastly exceeded the capacity for manual analysis, necessitating the use of advanced artificial intelligence (AI) techniques to assist scientists with the most labor-intensive tasks. AI can optimize simulation codes where computational bottlenecks arise from the time required to generate forward models. One such example is PHOEBE, a modeling code for eclipsing binaries (EBs), where simulating individual systems is feasible, but analyzing observables for extensive parameter combinations is highly time-consuming. To address this, we present a fully connected feedforward artificial neural network (ANN) trained on a dataset of over one million synthetic light curves generated with PHOEBE. Optimization of the ANN architecture yielded a model with six hidden layers, each containing 512 nodes, provides an optimized balance between accuracy and computational complexity. Extensive testing enabled us to establish ANN's applicability limits and to quantify the systematic and statistical errors associated with using such networks for EB analysis. Our findings demonstrate the critical role of dilution effects in parameter estimation for EBs, and we outline methods to incorporate these effects in AI-based models. This proposed ANN framework enables a speedup of over four orders of magnitude compared to traditional methods, with systematic errors not exceeding 1\%, and often as low as 0.01\%, across the entire parameter space.
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