论文标题

PARSEC v2.0:旋转的低和中间质量星的恒星轨道和等距

PARSEC V2.0: Stellar tracks and isochrones of low and intermediate mass stars with rotation

论文作者

Nguyen, C. T., Costa, G., Girardi, L., Volpato, G., Bressan, A., Chen, Y., Marigo, P., Fu, X., Goudfrooij, P.

论文摘要

我们提供了一个新的全面集合,这些集合的恒星进化轨道和等速线,用于旋转与PARSEC v2.0更新版本组装的低音和中间质量星星。此版本包括我们最近对过度旋转和旋转的额外混合的校准,以及核反应网络的一些改进,对流区域的处理,质量损失和其他物理输入参数。恒星模型的初始质量涵盖了从0.09 $ m_ \ odot $到14 $ m_ \ odot $,对于六组初始金属性,从z = 0.004到z = 0.017。考虑到$ \ sim 1 m_ \ odot $的恒星旋转,基于初始质量,在非旋转模型和极端快速旋转模型之间进行平滑过渡。对于比$ \ sim 1.3〜m_ \ odot $更大的恒星,从低到关键的恒星。我们通过Caffau等人采用太阳能化学混合物。用z $ _ \ odot $ = 0.01524。考虑到渐近巨人分支或中央C耗尽的前几个热脉冲的所有进化阶段。相应的理论等距是通过三裂代码进一步得出的,并在几个光度法系统中转换,考虑到不同的倾斜角。除了大小外,它们还提供了许多其他出色的可观察物,符合当前大型调查提供的数据。新系列已完全集成在用户友好的Web界面中,以便轻松地进行出色的人群研究。

We present a new comprehensive collection of stellar evolutionary tracks and isochrones for rotating low- and intermediate-mass stars assembled with the updated version of PARSEC V2.0. This version includes our recent calibration of the extra mixing from overshooting and rotation, as well as several improvements in nuclear reaction network, treatment of convective zones, mass loss and other physical input parameters. The initial mass of the stellar models covers the range from 0.09 $M_\odot$ to 14 $M_\odot$, for six sets of initial metallicity, from Z=0.004 to Z=0.017. Rotation is considered for stars above $\sim 1 M_\odot$ with a smooth transition between non rotating and extremely fast-rotating models, based on the initial mass. For stars more massive than $\sim 1.3~M_\odot$ the full rotation range, from low to the critical one, is considered. We adopt the solar-scaled chemical mixture by Caffau et al. with Z$_\odot$ = 0.01524. All the evolutionary phases from the pre-main-sequence to the first few thermal-pulses on the asymptotic-giant-branch or central C exhaustion, are considered. The corresponding theoretical isochrones are further derived with TRILEGAL code and are converted in several photometric systems, taking into account different inclination angles. Besides magnitudes, they also offer many other stellar observables in line with the data that are being provided by current large surveys. The new collection is fully integrated in a user friendly WEB interface for the benefit of easily performing stellar population studies.

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