Characterizing microlensing planetary system OGLE-2014-BLG-0676Lb with adaptive optics imaging

• 作者: Xiao-Jia Xie Subo Dong Yossi Shvartzvald Andrew Gould Andrzej Udalski Jean-Philippe Beaulieu Charles Beichman Laird Miller Close Calen B.Henderson Jared R.Males Jean-Baptiste Marquette Katie M.Morzinski Christopher R.Gelino
• 来源期刊: 天文和天体物理学研究
• 年，卷（期）: 2021,（12）
• 页码范围: 61-68
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-4527/ac2a09

摘要

We constrain the host-star flux of the microlensing planet OGLE-2014-BLG-0676Lb using adaptive optics(AO)images taken by the Magellan and Keck telescopes.We measure the flux of the light blended with the microlensed source to be K=16.79±0.04 mag and J=17.76±0.03 mag.Assuming that the blend is the lens star,we find that the host is a 0.73+0.14-0.29 M⊙ star at a distance of 2.67+0.77-1.41 kpc,where the relatively large uncertainty in angular Einstein radius measurement is the major source of uncertainty.With mass of Mp=3.68+1+0.69-1.44 MJ,the planet is likely a"super Jupiter"at a projected separation of r⊥=4.53+1.49-2.50 AU,and a degenerate model yields a similar Mp=3.73+0.73-1.47 MJ at a closer separation of r⊥=2.56+0.84-1.41 AU.Our estimates are consistent with the previous Bayesian analysis based on a Galactic model.OGLE-2014-BLG-0676Lb belongs to a sample of planets discovered in a"second-generation"planetary microlensing survey and we attempt to systematically constrain host properties of this sample with high-resolution imaging to study the distribution of planets.