中文

GJ 1252 b:一颗在 20.4 pc 处凌 M3 型矮星的 1.2 $R_{\oplus}$ 行星

地球与行星天体物理 2020-02-19 v2

摘要

我们报告发现 GJ 1252 b,一颗半径为 1.193 ±\pm 0.074 RR_{\oplus}、轨道周期 0.52 天的行星,围绕一颗距离 20.385 ±\pm 0.019 pc 的 M3 型恒星(0.381 ±\pm 0.019 MM_{\odot},0.391 ±\pm 0.020 RR_{\odot})运行。我们利用 TESS 数据、地基测光与光谱、Gaia 天体测量以及高角分辨率成像表明,TESS 数据中看到的凌星信号必定源自一颗凌星行星。我们通过排除所有试图将凌星信号解释为食双星来源的假阳性情景来做到这一点。精确的 Doppler 监测还给出了 2.09 ±\pm 0.56 MM_{\oplus} 的暂定质量测量。宿主恒星的邻近性、亮度(VV = 12.19 mag,KK = 7.92 mag)、低恒星活动以及系统短轨道周期,使该行星成为详细表征的有吸引力的目标,包括精确质量测量、寻找系统中其他天体以及行星大气表征。

关键词

引用

@article{arxiv.1912.05556,
  title  = {GJ 1252 b: A 1.2 $R_{\oplus}$ planet transiting an M3-dwarf at 20.4 pc},
  author = {Avi Shporer and Karen A. Collins and Nicola Astudillo-Defru and Jonathan Irwin and Xavier Bonfils and Kevin I. Collins and Elisabeth Matthews and Jennifer G. Winters and David R. Anderson and James D. Armstrong and David Charbonneau and Ryan Cloutier and Tansu Daylan and Tianjun Gan and Maximilian N. Günther and Coel Hellier and Keith Horne and Chelsea X. Huang and Eric L. N. Jensen and John Kielkopf and Enric Palle and Ramotholo Sefako and Keivan G. Stassun and Thiam-Guan Tan and Andrew Vanderburg and George R. Ricker and David W. Latham and Roland Vanderspek and Sara Seager and Joshua N. Winn and Jon M. Jenkins and Knicole Colon and Courtney D. Dressing and Sébastien Lépine and Philip S. Muirhead and Mark E. Rose and Joseph D. Twicken and Jesus Noel Villasenor},
  journal= {arXiv preprint arXiv:1912.05556},
  year   = {2020}
}

备注

Accepted to ApJ Letters