包含TP-AGB相的新一代PARSEC-COLIBRI恒星等时线
摘要
我们介绍新一代PARSEC-COLIBRI恒星等时线,其包含对热脉冲渐近巨星支(TP-AGB)相的详细处理,并覆盖宽广的初始金属丰度范围(0.0001<Zi<0.06)。与先前版本相比,主要新颖之处和改进在于:使用新的TP-AGB轨迹以及相关的M型和C型恒星大气模型与光谱;在等时线表中纳入表面H+He+CNO丰度,考虑扩散、上翻事件和底部燃烧的影响;纳入完整的热脉冲周期,完整描述恒星参数的周期内变化;新的脉动模型用以描述基频和第一泛频模式中的长周期变率;新的尘埃模型追踪AGB演化期间颗粒的增长,并结合辐射转移计算以再处理光球发射。总体而言,这些改进有望对分辨恒星族中预期的TP-AGB星性质给出更一致且细致的描述,特别是关于它们从光学到中红外波长的平均测光性质。我们展示了覆盖宽广年龄和初始金属丰度的恒星族中不同类型TP-AGB星的预期数量,进一步详述了在年龄和金属丰度中间值出现的C星岛,以及发生在所有金属丰度族中年龄接近1.6 Gyr处的AGB增强效应。该等时线可通过一个新的专用网络服务器获取。
引用
@article{arxiv.1701.08510,
title = {A new generation of PARSEC-COLIBRI stellar isochrones including the TP-AGB phase},
author = {Paola Marigo and Leo Girardi and Alessandro Bressan and Philip Rosenfield and Bernhard Aringer and Yang Chen and Marco Dussin and Ambra Nanni and Giada Pastorelli and Thaise S. Rodrigues and Michele Trabucchi and Sara Bladh and Julianne Dalcanton and Martin A. T. Groenewegen and Josefina Montalban and Peter R. Wood},
journal= {arXiv preprint arXiv:1701.08510},
year = {2017}
}
备注
20 pages, 12 figures. This is an author-created, un-copyedited version of an article published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://iopscience.iop.org/article/10.3847/1538-4357/835/1/77/meta