论文标题
Stecphot：比较光谱和光度系外行星随访方法
SpecPhot: A Comparison of Spectroscopic and Photometric Exoplanet Follow-Up Methods
论文作者
论文摘要
我们制定了一个模拟，以探讨系外行星候选者的随访。我们考虑使用三种仪器：NGTS，HARPS和CORALIE进行比较光度法（过境方法）和光谱法（多普勒移位法）技术。我们考虑了随访的精度，并需要观察时间，以尝试将每种方法对给定的一组行星系统参数进行排名。在表征前的两个标准，即检测和随访时间上评估该方法。我们发现，对于参数空间的不同区域，优选不同的随访技术。对于SNR，我们发现给定系统的光谱SNR的比率就像$ r_p/p^{\ frac {1} {3}} $。在后续时间内，我们发现在最短的时期系统（$ <10 $ d）以及具有小行星半径的系统中，光度法受到青睐。然后，对于半径较大，因此更大的行星系统（考虑到我们假定的质量 - 拉迪乌斯关系），光谱法是优选的。最后，我们尝试考虑望远镜的可用性，并相应地考虑这两种方法。
We set out a simulation to explore the follow-up of exoplanet candidates. We look at comparing photometric (transit method) and spectroscopic (Doppler shift method) techniques using three instruments: NGTS, HARPS and CORALIE. We take into account precision of follow-up and required observing time in attempt to rank each method for a given set of planetary system parameters. The methods are assessed on two criteria, SNR of the detection and follow-up time before characterisation. We find that different follow-up techniques are preferred for different regions of parameter space. For SNR we find that the ratio of spectroscopic to photometric SNR for a given system goes like $R_p/P^{\frac{1}{3}}$. For follow-up time we find that photometry is favoured for the shortest period systems ($<10$ d) as well as systems with small planet radii. Spectroscopy is then preferred for systems with larger radius, and thus more massive, planets (given our assumed mass-radius relationship). Finally, we attempt to account for availability of telescopes and weight the two methods accordingly.
