论文标题
巨大恒星的命运:探索与Metisse的恒星进化中的不确定性
The fates of massive stars: exploring uncertainties in stellar evolution with METISSE
论文作者
论文摘要
在晚期电磁和重力波探测器的时代,有效地结合和研究恒星进化对二进制二进制和恒星动力学系统的影响已经变得越来越重要。需要在恒星进化中探索不确定参数的系统研究以说明恒星种群的最新观察结果。我们为常用的单星演化(SSE)拟合公式提供了一种新方法,一种更适合适应性的方法:单星进化的插值方法(metisse)。它利用了预计的恒星轨道集之间的插值,以近似恒星种群的演化参数。我们已经使用了由模块计算的详细恒星轨迹,用于恒星天体物理学(MESA),波恩进化代码(BEC)和剑桥恒星代码。与SSE相比,Metisse更好地再现使用星形代码计算的恒星轨道,并且平均要快三倍。使用使用Mesa和Bec计算的恒星轨道,我们应用Metisse探索残留质量的差异,最大径向膨胀以及巨大恒星的主要序列寿命。我们发现,在恒星进化中使用的不同物理成分(例如辐射主导的信封的处理)可能会影响其进化结果。对于9至100 m $ _ \ odot $的质量范围中的恒星,残留质量的预测可以变化高达20 m $ _ \ odot $,而星星实现的最大径向膨胀率可能会因不同恒星模型之间的数量级而差异。
In the era of advanced electromagnetic and gravitational wave detectors, it has become increasingly important to effectively combine and study the impact of stellar evolution on binaries and dynamical systems of stars. Systematic studies dedicated to exploring uncertain parameters in stellar evolution are required to account for the recent observations of the stellar populations. We present a new approach to the commonly used Single-Star Evolution (SSE) fitting formulae, one that is more adaptable: Method of Interpolation for Single Star Evolution (METISSE). It makes use of interpolation between sets of pre-computed stellar tracks to approximate evolution parameters for a population of stars. We have used METISSE with detailed stellar tracks computed by the Modules for Experiments in Stellar Astrophysics (MESA), Bonn Evolutionary Code (BEC) and Cambridge STARS code. METISSE better reproduces stellar tracks computed using the STARS code compared to SSE, and is on average three times faster. Using stellar tracks computed with MESA and BEC, we apply METISSE to explore the differences in the remnant masses, the maximum radial expansion, and the main-sequence lifetime of massive stars. We find that different physical ingredients used in the evolution of stars, such as the treatment of radiation dominated envelopes, can impact their evolutionary outcome. For stars in the mass range 9 to 100 M$_\odot$, the predictions of remnant masses can vary by up to 20 M$_\odot$, while the maximum radial expansion achieved by a star can differ by an order of magnitude between different stellar models.