论文标题
明亮行星主机HD 38529的强大星星震动特性
Robust asteroseismic properties of the bright planet host HD 38529
论文作者
论文摘要
过渡性系外行星调查卫星（TESS）正在记录大部分天空中的短期循环时间，这为检测和研究有趣的恒星，特别是星球宿主的振荡提供了机会。我们已经检测并分析了明亮的G4子巨星HD 38529中的太阳能振荡，该振荡在14.3 d轨道上载有一个内部的，大致的木星质量行星，在2136 d轨道上托有14.3 d d轨道和外部低质量的棕色矮人。我们结合了多个恒星建模团队的结果，以产生恒星特性的强大的星号估计值，包括其质量$ $ m = 1.48 \ pm 0.04 \ mathrm {m} _ \ odot $，半径$ r = 2.68 \ 2.68 \ pm 0.03 \ pm pm} \，\ Mathrm {gyr} $。我们的结果证实，HD 38529的质量接近文献中可以找到的范围的高端，并且还证明可以测量与Corot，Kepler或K2产生的时间更短的时间表，可以测量精确的恒星性能。
The Transiting Exoplanet Survey Satellite (TESS) is recording short-cadence, high duty-cycle timeseries across most of the sky, which presents the opportunity to detect and study oscillations in interesting stars, in particular planet hosts. We have detected and analysed solar-like oscillations in the bright G4 subgiant HD 38529, which hosts an inner, roughly Jupiter-mass planet on a 14.3 d orbit and an outer, low-mass brown dwarf on a 2136 d orbit. We combine results from multiple stellar modelling teams to produce robust asteroseismic estimates of the star's properties, including its mass $M = 1.48 \pm 0.04 \mathrm{M}_\odot$, radius $R = 2.68 \pm 0.03 \mathrm{R}_\odot$ and age $t = 3.07 \pm 0.39 \,\mathrm{Gyr}$. Our results confirm that HD 38529 has a mass near the higher end of the range that can be found in the literature and also demonstrate that precise stellar properties can be measured given shorter timeseries than produced by CoRoT, Kepler or K2.
