To investigate the feasibility of ancillary target observations with ESA’s Ariel mission, we compiled a list of potentially interesting young stars: FUors, systems harbouring extreme debris discs and a larger sample of young stellar objects showing strong near/mid-infrared excess. These objects can be observed as additional targets in the waiting times between the scheduled exoplanet transit and occultation observations. After analyzing the schedule for Ariel an algorithm was constructed to find the optimal target to be observed in each gap. The selection was mainly based on the slew and stabilization time needed to observe the selected YSO, but it also incorporated the scientific importance of the targets and whether they have already been sufficiently measured. After acquiring an adequately large sample of simulation data, it was concluded that approximately 99.2% of the available – at least one hour long – gaps could be used effectively. With an average slewing and stabilization time of about 16.7 minutes between scheduled exoplanet transits and ancillary targets, this corresponds to an additional 2881 ± 56 hours of active data gathering. When this additional time is used to observe our selected 200 ancillary targets, a typical signal-to-noise ratio of \(\sim 10^{4}\) can be achieved along the whole spectral window covered by Ariel.

为了研究使用 ESA 的Ariel任务进行辅助目标观测的可行性，我们编制了一份可能有趣的年轻恒星列表：FUors、包含极端碎片盘的系统和更大的年轻恒星物体样本，显示出强烈的近/中红外过剩。在预定的系外行星凌日和掩星观测之间的等待时间内，这些物体可以作为额外的目标被观测到。在分析了Ariel的日程安排之后构建了一种算法来找到在每个间隙中要观察的最佳目标。选择主要基于观测所选 YSO 所需的回转和稳定时间，但也考虑了目标的科学重要性以及它们是否已经得到充分测量。在获得足够大的模拟数据样本后，得出的结论是大约 99.2% 的可用（至少一小时）间隙可以有效利用。预定的系外行星凌日和辅助目标之间的平均回转和稳定时间约为 16.7 分钟，这相当于额外的 2881 ± 56 小时的主动数据收集。当这个额外的时间用于观察我们选择的 200 个辅助目标时，典型的信噪比为\(\sim 10^{4}\)可以沿着Ariel覆盖的整个光谱窗口实现。