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.

中文翻译：

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明亮行星宿主 HD 38529 的强大星震特性

凌日系外行星勘测卫星 (TESS) 正在记录大部分天空的短节奏、高占空比时间序列，这为检测和研究有趣恒星（尤其是行星宿主）的振荡提供了机会。我们已经探测并分析了明亮的 G4 次巨星 HD 38529 中的类太阳振荡，它在 14.3 d 轨道上拥有一颗内部的、大约木星质量的行星和一颗在 2136 d 轨道上的外部低质量褐矮星。我们结合了多个恒星建模团队的结果，对恒星的属性进行了稳健的星震估计，包括其质量 $M = 1.48 \pm 0.04 \mathrm{M}_\odot$，半径 $R = 2.68 \pm 0.03 \mathrm{R }_\odot$ 和年龄 $t = 3.07 \pm 0.39 \,\mathrm{Gyr}$。