Radial-velocity follow-up of stars harbouring transiting planets detected by TESS is expected to require very large amounts of expensive telescope time in the next few years. Therefore, scheduling strategies should be implemented to maximize the amount of information gathered about the target planetary systems. We consider myopic and non-myopic versions of a novel uniform-in-phase scheduler, as well as a random scheduler, and compare these scheduling strategies with respect to the bias, accuracy and precision achieved in recovering the mass and orbital parameters of transiting and non-transiting planets. This comparison is carried out based on realistic simulations of radial-velocity follow-up with ESPRESSO of a sample of 50 TESS target stars, with simulated planetary systems containing at least one transiting planet with a radius below 4R⊕. Radial-velocity data sets were generated under reasonable assumptions about their noise component, including that resulting from stellar activity, and analysed using a fully Bayesian methodology. We find the random scheduler leads to a more biased, less accurate, and less precise, estimation of the mass of the transiting exoplanets. No significant differences are found between the results of the myopic and non-myopic implementations of the uniform-in-phase scheduler. With only about 22 radial velocity measurements per data set, our novel uniform-in-phase scheduler enables an unbiased (at the level of 1 per cent) measurement of the masses of the transiting planets, while keeping the average relative accuracy and precision around 16 per cent and 23 per cent, respectively. The number of non-transiting planets detected is similar for all the scheduling strategies considered, as well as the bias, accuracy and precision with which their masses and orbital parameters are recovered.

中文翻译：

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ESPRESSO 跟踪 TESS 目标的调度策略

TESS 探测到的恒星的径向速度跟踪预计将需要大量昂贵的望远镜时间。因此，应实施调度策略以最大限度地收集有关目标行星系统的信息量。我们考虑了一种新颖的同相调度器以及随机调度器的近视和非近视版本，并比较了这些调度策略在恢复过境和轨道参数的质量和轨道参数方面的偏差、准确性和精度。非凌日行星。这种比较是基于对 50 个 TESS 目标恒星样本的 ESPRESSO 径向速度跟踪的真实模拟进行的，模拟的行星系统包含至少一个半径低于 4R⊕ 的凌日行星。径向速度数据集是在对其噪声分量（包括恒星活动产生的噪声分量）的合理假设下生成的，并使用完全贝叶斯方法进行分析。我们发现随机调度器会导致对凌日系外行星质量的估计更偏颇、更不准确和更不精确。在同相调度器的近视和非近视实现的结果之间没有发现显着差异。每个数据集只有大约 22 次径向速度测量，我们新颖的同相调度器能够对凌日行星的质量进行无偏（在 1% 的水平）测量，同时保持平均相对准确度和精度在 16 左右分别为 % 和 23%。