论文标题
翼肌:一种统一搜索和兽医的工具
Pterodactyls: A Tool to Uniformly Search and Vet for Young Transiting Planets In TESS Primary Mission Photometry
论文作者
论文摘要
开普勒的短期系外行星人口揭示了进化特征,例如半径谷和热海王星沙漠,它们可能会随着时间的流逝而被大气损失所塑造。这些发现表明,原始星球的种群与Gyr-Old Kepler人群不同,并激发了周围年轻恒星周围的系外行星搜索。在这里,我们提出了翼龙,这是一条专门为解决年轻恒星周围的系外行星所面临的挑战而构建的数据减少管道,并与TESS初级任务30分钟的节奏光度法合作,因为大多数年轻的恒星不是预先选择的苔丝2分钟可节奏目标。翼甲基于公开可用和经过测试的工具,以提取,逐渐消除,搜索和兽医过渡年轻的星球候选者。我们搜索具有已知过境行星的五个簇:图卡纳州立大学协会,IC 2602,上城狼疮,Ursa Major和Pisces Eridani。我们表明,翼手龙在八个已确认的行星中恢复了七个,而在两个候选行星中,其中大多数最初是在2分钟的节奏数据中检测到的。对于这些簇,我们进行注射回收测试以表征我们的检测效率,并计算出固有的行星发生率为49+-20%的子核和海王星(1.8-6 RE)(1.8-6 RE),这比Kepler的gypler gypler gypler gyr gyr的发生率高6.8+-0.3%。这可能意味着由于大气质量损失,这些行星随着时间而缩小。但是,对过境年轻行星的发生的适当评估将需要对已经检测到的行星无偏见。因此,将来的工作将使用翼手龙搜索和审查附近群集和移动组中的行星候选者。
Kepler's short-period exoplanet population has revealed evolutionary features such as the Radius Valley and the Hot Neptune desert that are likely sculpted by atmospheric loss over time. These findings suggest that the primordial planet population is different from the Gyr-old Kepler population, and motivates exoplanet searches around young stars. Here, we present pterodactyls , a data reduction pipeline specifically built to address the challenges in discovering exoplanets around young stars and to work with TESS Primary Mission 30-min cadence photometry, since most young stars were not pre-selected TESS 2-min cadence targets. pterodactyls builds on publicly available and tested tools in order to extract, detrend, search, and vet transiting young planet candidates. We search five clusters with known transiting planets: Tucana-Horologium Association, IC 2602, Upper Centaurus Lupus, Ursa Major and Pisces Eridani. We show that pterodactyls recovers seven out of the eight confirmed planets and one out of the two planet candidates, most of which were initially detected in 2-min cadence data. For these clusters, we conduct injection-recovery tests to characterize our detection efficiency, and compute an intrinsic planet occurrence rate of 49+-20% for sub-Neptunes and Neptunes (1.8-6 Re) within 12.5 days, which is higher than Kepler's Gyr-old occurrence rates of 6.8+-0.3%. This potentially implies that these planets have shrunk with time due to atmospheric mass loss. However, a proper assessment of the occurrence of transiting young planets will require a larger sample unbiased to planets already detected. As such, pterodactyls will be used in future work to search and vet for planet candidates in nearby clusters and moving groups.