星团中星仪巡天的潜力：相关噪声和径向速度跟踪的影响
On the potential of transit surveys in star clusters: Impact of correlated noise and radial velocity follow-up
摘要：
我们提出了一个扩展的形式主义最近提出的佩珀和高迪评估产量的过境调查在均匀的恒星系统，将相关噪声过境时间尺度上的可探测性的过境的影响，并同时纳入的大小限制所施加的径向速度后续过境候选人的需要。新的表达式推导出不同的贡献，过境时间尺度上的噪声预算和最小二乘检测统计箱形过境，其行为作为恒星质量的函数重新检查。相关的噪声是恒定的视星等意味着在高质量端的检测概率急剧下降，当考虑到径向速度的要求，可以严重限制潜在的，否则有前途的调查星团。然而，我们发现，小口径，宽视场的调查可能会发现热海王星的径向速度信号可以测量与目前的仪器在非常接近（<100 pc）集群。
英文摘要：
We present an extension of the formalism recently proposed by Pepper & Gaudi to evaluate the yield of transit surveys in homogeneous stellar systems, incorporating the impact of correlated noise on transit time-scales on the detectability of transits, and simultaneously incorporating the magnitude limits imposed by the need for radial velocity follow-up of transit candidates. New expressions are derived for the different contributions to the noise budget on transit time-scales and the least-squares detection statistic for box-shaped transits, and their behaviour as a function of stellar mass is re-examined. Correlated noise that is constant with apparent stellar magnitude implies a steep decrease in detection probability at the high mass end which, when considered jointly with the radial velocity requirements, can severely limit the potential of otherwise promising surveys in star clusters. However, we find that small-aperture, wide field surveys may detect hot Neptunes whose radial velocity signal can be measured with present-day instrumentation in very nearby (<100 pc) clusters.
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