K2巡天扩展。V. 来自K2第2–18观测期的60颗新系外行星的统计验证
地球与行星天体物理
2022-05-18 v2 太阳与恒星天体物理
摘要
NASA的K2任务从开普勒望远镜的硬件故障中挽救而来，延续了开普勒搜寻行星的成功。它已在黄道面附近发现近500颗凌星行星（其中许多成为后续研究对象）以及逾1000颗额外候选体。本文展示一项正在进行的新K2行星后续观测与统计验证项目的结果，旨在特别识别有前景的新目标以作进一步表征。通过分析91颗候选体的侦察光谱、高分辨率成像、质心偏移及信号统计似然，我们在46个系统中验证了60颗新行星。其中包括：若干适于透射光谱（K2-384 f、K2-387 b、K2-390 b、K2-403 b和K2-398 c）、发射光谱（K2-371 b、K2-370 b和K2-399 b）及两者兼宜（K2-405 b和K2-406 b）的行星；若干具有平运动共振或近共振的行星系统（K2-381、K2-398），含一个围绕中M矮星（K2-384）的紧凑、类TRAPPIST-1五小行星系统；热土星荒漠中的超短周期亚土星行星（K2-399 b）；以及绕一颗中等亮度（V=11.93）、贫金属（[Fe/H]=-0.579±0.080）宿主恒星的超级地球（K2-408 b）。我们总计在4颗F型星、26颗G型星、13颗K型星和3颗M矮星周围验证了行星。此外，我们提供37颗已筛查行星候选体列表，应优先开展后续观测以确认或验证。
引用
@article{arxiv.2203.02087,
title = {Scaling K2. V. Statistical Validation of 60 New Exoplanets From K2 Campaigns 2-18},
author = {Jessie L. Christiansen and Sakhee Bhure and Jon K. Zink and Kevin K. Hardegree-Ullman and Britt Duffy Adkins and Christina Hedges and Timothy D. Morton and Allyson Bieryla and David R. Ciardi and William D. Cochran and Courtney D. Dressing and Mark E. Everett and Howard Isaacson and John H. Livingston and Carl Ziegler and Perry Berlind and Michael L. Calkins and Gilbert A. Esquerdo and David W. Latham and Michael Endl and Phillip J. MacQueen and Benjamin J. Fulton and Lea A. Hirsch and Andrew W. Howard and Lauren M. Weiss and Bridgette E. Allen and Arthur Berberyann and Krys N. Ciardi and Ava Dunlavy and Sofia H. Glassford and Fei Dai and Teruyuki Hirano and Motohide Tamura and Charles Beichman and Erica J. Gonzales and Joshua E. Schlieder and Thomas Barclay and Ian J. M. Crossfield and Emily A. Gilbert and Elisabeth C. Matthews and Steven Giacalone and Erik A. Petigura},
journal= {arXiv preprint arXiv:2203.02087},
year = {2022}
}
备注
50 pages, 14 figures, 7 tables, accepted in AJ; replaced to fix error in planet name (thanks Travis!) and error in figure label