标题： 普拉托洛普斯预测的 blended 光变双星虚假信号的统计性质 显示英文标题

标题： Statistical Properties of Predicted Blended Eclipsing Binary False Positives in PLATO LOPS

摘要： 随着计划于2026年发射的PLAnetary Transit和恒星振荡（PLATO）卫星任务，理解恒星特性和天文学虚假信号（FPs）的空间分布对于确保有限的地面光谱资源能够高效地针对最有可能的真实行星凌日（PT）候选者至关重要。在我们之前的文章，Bray等人（2023）中，我们展示了在提议的南半球PLATO区域（我们称之为SPF0）中预期的混合食双星虚假信号（BEB）百分比。这是通过对SPF0完整合成渲染的详细统计分析得出的。在这篇后续文章中，我们呈现了创建这些BEB的合成双星群体的更详细分析，包括模拟行星的视半径、与地球的距离、轨道周期以及双星分量的质量和演化状态。我们检查了来自400次新的独立模拟的BEB属性，在这400次模拟中，所有合成双星在整个SPF0区域内被赋予了随机轨道倾角。我们考虑了由所有非紧凑残骸双星的所有掩食产生的BEB。最后，我们检查了最可能被误认为宜居带内行星的BEB，我们将其定义为具有180到1000天周期且满足我们的临界倾角检查的完全或部分掩食双星。 显示英文摘要

摘要： With the planned launch of the PLAnetary Transit and Oscillation of stars (PLATO) satellite mission in 2026, an understanding of the stellar properties and spatial distribution of astrophysical false positives (FPs) is essential to ensure the limited ground-based spectroscopy resources are used efficiently to target the most likely genuine planetary transit (PT) candidates. In our previous paper, Bray et al. (2023), we presented the expected blended eclipsing binary false positive (BEB) percentage in the proposed Southern PLATO field, which we referred to as SPF0. This was obtained from a detailed statistical analysis of a complete synthetic rendering of SPF0. In this follow-up paper, we present a more detailed analysis of the synthetic binary population creating these BEBs including the apparent radii of the planets mimicked, distances from Earth, orbital periods and binary component masses and evolutionary state.We examine the properties of the BEBs from 400 new independent simulations where random orbital inclinations were assigned to all synthetic binaries in the entire SPF0 region. We consider BEBs created by all eclipses of non-compact remnant binaries. Finally we examine the BEBs most likely to be mistaken for planets in the habitable zone which we define as fully or partially eclipsing binaries with periods between 180 and 1,000 days satisfying our critical inclination angle check.