太阳邻域中大多数太阳型双星的开放星团起源及其对原行星稳定性的影响
An Open Cluster Origin for Most Solar-Type Binaries in the Solar Neighborhood and Implications for Primordial Planet Stability
- Northwestern University（西北大学）
- The University of Alabama（阿拉巴马大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本研究利用盖亚数据与N体模拟，发现至少53%的太阳型场双星起源于开放星团，并量化了动力学过程对双星系统行星稳定性的影响。
AI中文摘要：
我们首次利用盖亚（Gaia）数据校准估计了动力学处理的开放星团（OCs）对邻近太阳型场双星群体的贡献，并研究了其对原行星稳定性的影响。我们结合盖亚DR3观测、星团形成与瓦解的经验模型以及直接N体模拟，来约束过去5 Gyr内起源于开放星团、距离在1 kpc以内的场FGK型双星的比例。我们发现，至少约53%的太阳型场双星形成于初始质量大于200 M_Sun的开放星团中，在这些星团中动力学处理变得显著。我们通过推导环绕双星行星失稳的经验公式（作为双星间距的函数）以及稳定共面环双星相空间分数减少的经验公式，量化了恒星遭遇和双星轨道演化对环双星和环恒星行星稳定性的影响。这些结果为评估开放星团动力学演化如何影响双星系统中行星的稳定性，从而对观测到的系外行星种群统计做出贡献，提供了一个框架。
英文摘要：
We present the first Gaia-calibrated estimate of the contribution of dynamically processed open clusters (OCs) to the nearby solar-type field binary population and investigate the implications for primordial planet stability. We combine Gaia DR3 observations, empirical models of cluster formation and dissolution, and direct N-body simulations to constrain the fraction of field FGK-type binaries within 1 kpc that originated in OCs over the past 5 Gyr. We find that at least ~53% of solar-type field binaries formed in OCs with initial masses > 200 M_Sun, where dynamical processing becomes significant. We quantify the effects of stellar encounters and binary orbital evolution on the stability of both circumbinary and circumstellar planets by deriving empirical prescriptions for circumbinary planet destabilization as a function of binary separation and for the fractional reduction of stable circumstellar coplanar phase space. These results provide a framework for evaluating how OC dynamical evolution may influence the stability of planets in binary systems and therefore contribute to observed exoplanet demographics.
