PLATO字段选择过程III. LOPS2字段的主样本选择
The PLATO field selection process III. Selection of the Prime Sample for the LOPS2 field
AI总结：
PLATO任务通过地面观测计划确认候选行星，重点选择15000颗高质量目标中的主样本，用于后续径向速度测量，方法适用于行星 transit 调查。
摘要：
PLATO任务将在2027年初开始其四年的名义任务，通过其第一个长周期观测阶段场（LOPS2）进行持续至少两年的监测。PLATO的主要目标是发现类地球行星，这些行星位于附近和明亮的太阳类恒星的宜居带内。为此，PLATO任务联盟将通过其地面观测计划（GOP）执行必要的后续工作，以确认由PLATO发现的候选行星的光度，并通过径向速度曲线测量其质量。对于LOPS2，GOP承诺（作为PLATO任务的一部分）将跟进发现围绕PLATO输入目录（PIC）中15000颗高质量目标子集（称为主样本PS）的系外行星。PS将在发射前九个月在欧洲航天局（ESA）发布的第一次客座观察者（GO）提案中公开。本文介绍了选择和优先考虑PS的定量指标和阈值。我们的方法完全通用，适用于对 transit 行星进行观测的恒星列表进行排名。我们还描述了LOPS2 PS的天体物理特性，既从统计意义上又针对一些感兴趣的特定目标。
英文摘要：
The PLanetary Transits and Oscillations of stars (PLATO) mission will begin its four-year nominal mission in early 2027 by monitoring its first Long-duration Observation Phase field at South (LOPS2), for at least two years continuously. The primary aim of PLATO is a very ambitious and challenging one: the discovery of Earth-like planets in the habitable zone of nearby and bright solar analogues. To this purpose, the PLATO Mission Consortium, through its Ground-based Observing Program (GOP), will perform the follow-up needed to confirm part of the candidate planets photometrically detected by PLATO and measure their masses through radial velocity curves. For the LOPS2, the GOP is committed (as part of the PLATO mission) to follow-up the candidate exoplanets discovered orbiting the 15,000 high-quality target subset of the PLATO Input Catalog (PIC) known as the Prime Sample (PS). The PS will be made public nine months before launch in the context of the first Guest Observer (GO) call for proposals to be issued by the European Space Agency (ESA). Here, we present the quantitative metrics and thresholds defined to select and prioritize the PS. Our method is perfectly general and suitable to rank any list of stars surveyed for transiting planets. We also describe the astrophysical properties of the LOPS2 PS, both in a statistical sense and for some specific targets of interest.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
