论文标题
用于TRGB亮度的新校准模型和对理论不确定性的彻底分析
New calibrated models for the TRGB luminosity and a thorough analysis of theoretical uncertainties
论文作者
论文摘要
红色巨型分支（TRGB）的尖端的亮度对距离梯子的构建有用，其准确的建模是确定局部哈勃参数的关键。在这项工作中，我们对TRGB亮度进行了广泛的定量分析，该分析实际上影响了所有影响它的输入物理：化学组成，不透明，扩散，核反应速率，电子筛选，中微子，中微子，对流效率，边界条件，边界条件和质量损失等。 我们的分析基于新生产的$ \ sim 3 \ times 10^6 $ trgb型号，从前序列演变为TRGB的氦点点火开关，并涵盖了多种金属性（z = 0.0001-0.02）和初始质量（m = 0.8-1.4 $ $ _ $ m _ _ _ {m = 0.8-1.4 $ _ _ {\ odot} $）。通过蒙特卡洛分析，我们研究了由于所有上述输入物理学的综合作用而导致的TRGB光度的系统变化，并表明当前一代模型中仍然存在最大理论不确定性约为$ 1.6 \％$，并由辐射透明度的系统学系统主导。结果还提供了几个光度带。 作为我们分析的副产品，我们证明了尖端光度对输入物理的单个变化的线性响应的可靠证据，这可以显着简化未来的分析。我们的结果与其他恒星进化代码的比较显示出了极好的一致性，而我们的模型网格则根据合理的要求提供。
The luminosity of the Tip of the Red Giant Branch (TRGB) is instrumental for the construction of the distance ladder, and its accurate modelling is key for determining the local Hubble parameter. In this work, we present an extensive quantitative analysis of the TRGB luminosity, accounting for virtually all input physics that affect it: chemical composition, opacity, diffusion, nuclear reaction rates, electron screening, neutrinos, convection efficiency, boundary conditions and mass loss, amongst others. Our analysis is based on a newly produced grid of $\sim 3\times 10^6$ TRGB models, evolved from pre-main sequence up to the helium ignition at the TRGB, and covering a wide range of metallicity (Z = 0.0001-0.02) and initial mass (M = 0.8-1.4 $M_{\odot}$). Through a Monte-Carlo analysis, we study the systematic variation of the TRGB luminosity due to the combined effect of all above input physics, and show that a maximum theoretical uncertainty of about $1.6 \%$ is still present on the current generation of models, dominated by systematics of radiative opacity. Results are also provided in several photometric bands. As a by-product of our analysis, we demonstrate robust evidence for the linear response of the Tip luminosity to individual changes of input physics, which can significantly simplify future analyses. A comparison of our results with other stellar evolution codes shows excellent agreement, while our grid of models is available upon reasonable requests.
