TOI 560：一颗K型矮星周围两颗凌星行星的iSHELL、PFS与HIRES视向速度验证
地球与行星天体物理
2022-10-06 v4
摘要
我们确认了围绕年龄0.15--1.4 Gyr的K4型矮星TOI 560（HD 73583）的两行星系统的存在。该系统由一颗内部中等偏心率的凌星迷你海王星（TOI 560 b，天，，）和一颗凌星迷你海王星（TOI 560 c，天，）组成，前者最初由Sector 8 \tess\ 任务观测发现，后者由Sector 34观测发现，二者处于罕见的近1:3轨道共振。我们利用来自\tess\, \textit{Spitzer}及地基后随观测的光度数据确认凌星行星的历元与周期、排查假阳性情形，并探测到TOI 560 b的光电偏心率效应。我们通过NASA红外望远镜设施的iSHELL光谱仪与Keck天文台的HIRES光谱仪获取后随光谱及相应高精度视向速度（RVs）以验证这些信号的行星本质，并将其与Magellan天文台已发表的PFS RVs合并。我们以显著性探测到两行星质量。我们对\tess\ 光变曲线应用高斯过程（GP）模型，以对色散视向速度GP模型施加先验来约束TOI 560宿主星的恒星活动，并确认恒星活动具有强波长依赖性，展示了近红外RVs在缓解年轻K型矮星恒星活动方面的能力。TOI 560是一个邻近、中等年轻的多行星系统，其中两颗行星适合用James Webb Space Telescope (JWST)等即将到来的任务进行大气表征。特别地，在2027年6月前它将经历六次间隔6小时的凌星对。
引用
@article{arxiv.2112.13448,
title = {TOI 560 : Two Transiting Planets Orbiting a K Dwarf Validated with iSHELL, PFS and HIRES RVs},
author = {Mohammed El Mufti and Peter P. Plavchan and Howard Isaacson and Bryson L. Cale and Dax L. Feliz and Michael A. Reefe and Coel Hellier and Keivan Stassun and Jason Eastman and Alex Polanski and Ian J. M. Crossfield and Eric Gaidos and Veselin Kostov and Joel Villasenor and Joshua E. Schlieder and Luke G. Bouma and Kevin I. Collins and Justin M. Wittrock and Farzaneh Zohrabi and Rena A. Lee and Ahmad Sohani and John Berberian and David Vermilion and Patrick Newman and Claire Geneser and Angelle Tanner and Natalie M. Batalha and Courtney Dressing and Benjamin Fulton and Andrew W. Howard and Daniel Huber and Stephen R. Kane and Erik A. Petigura and Paul Robertson and Arpita Roy and Lauren M. Weiss and Aida Behmard and Corey Beard and Ashley Chontos and Fei Dai and Paul A. Dalba and Tara Fetherolf and Steven Giacalone and Michelle L. Hill and Lea A. Hirsch and Rae Holcomb and Jack Lubin and Andrew Mayo and Teo Movcnik and Joseph M. Akana Murphy and Lee J. Rosenthal and Ryan A. Rubenzahl and Nicholas Scarsdale and Christopher Stockdale and Karen Collins and Ryan Cloutier and Howard Relles and Thiam-Guan Tan and Nicholas J Scott and Zach Hartman and Elisabeth Matthews and David Ciardi and Erica Gonzales and Rachel A. Matson and Charles Beichman and E. Furlan and Crystal L. Gnilka and Steve B. Howell and Carl Ziegler and Cesar Briceno and Nicholas Law and Andrew W. Mann and Markus Rabus and Marshall C. Johnson and Jessie Christiansen and Laura Kreidberg and David Anthony Berardo and Drake Deming and Varoujan Gorjian and Farisa Y. Morales and Björn Benneke and Diana Dragomir and Robert A. Wittenmyer and Sarah Ballard and Brendan P. Bowler and Jonathan Horner and John Kielkopf and Huigen Liu and Avi Shporer and C. G. Tinney and Hui Zhang and Duncan J. Wright and Brett C. Addison and Matthew W. Mengel and Jack Okumura},
journal= {arXiv preprint arXiv:2112.13448},
year = {2022}
}
备注
AAS Journals, Accepted for publication