论文标题
过渡最小二乘调查IV。柏拉图特派团期望的类似地球的过境行星
Transit least-squares survey IV. Earth-like transiting planets expected from the PLATO mission
论文作者
论文摘要
在其长期观察阶段，柏拉图卫星将观察到两个非重叠的场，总计4年。每个指数的确切持续时间将在启动前2年确定。先前对柏拉图在太阳能星周周围可居住区（Hz）中柏拉图的产量的估计范围为6至280之间。我们使用柏拉图太阳能光曲线模拟器（PSLS）模拟光曲线，以在25 s的平台上，在亮点（M_V> 11）较高的pl Prter plar plate plate plate plate plat plar的光星周围的光线曲线，以25 s的高度均匀地代表。 （主要是F5-k7矮人和sub dwarfs）。我们的研究包括由柏拉图（Plato）12 cm孔径相机的6、12、18和24的同步观测产生的光曲线。使用WotAN软件进行自动脱落，并使用过境最小二乘（TLS）算法进行置入后运输检测。我们以P1样品中的预期恒星的预期尺寸缩放真实的正速率（TPR），并具有对系外行星发生率的现代估计，并预测了在F5-K7矮星附近Hzs中使用0.5 r_e <= R_P <= 1.5 r_e的行星的检测。对于（2年 + 2年）的长期观察阶段策略，我们预测11-34个检测，对于（3年 + 1年）策略，我们预测了8-25个发现。我们对恒星变异性对地球样行星浅层转运的影响的研究表明，我们对柏拉图行星产量的估计，我们使用光图像安静的恒星（如太阳）得出，必须将其视为上限。总之，柏拉图在太阳能恒星周围的Hzs中大约十二个地球大小的行星的检测将意味着对具有地球样行星的外部分类参数空间的采样较差的一部分做出了重大贡献。
In its long-duration observation phase, the PLATO satellite will observe two non-overlapping fields for a total of 4 yr. The exact duration of each pointing will be determined 2 yr before launch. Previous estimates of PLATO's yield of Earth-sized planets in the habitable zones (HZs) around solar-type stars ranged between 6 and 280. We use the PLATO Solar-like Light curve Simulator (PSLS) to simulate light curves with transiting planets around bright (m_V > 11) Sun-like stars at a cadence of 25 s, roughly representative of the >15,000 targets in PLATO's high-priority P1 sample (mostly F5-K7 dwarfs and sub-dwarfs). Our study includes light curves generated from synchronous observations of 6, 12, 18, and 24 of PLATO's 12 cm aperture cameras over both 2 yr and 3 yr of continuous observations. Automated detrending is done with the Wotan software and post-detrending transit detection is performed with the Transit Least Squares (TLS) algorithm. We scale the true positive rates (TPRs) with the expected number of stars in the P1 sample and with modern estimates of the exoplanet occurrence rates and predict the detection of planets with 0.5 R_E <= R_p <= 1.5 R_E in the HZs around F5-K7 dwarf stars. For the (2 yr + 2 yr) long-duration observation phase strategy we predict 11-34 detections, for the (3 yr + 1 yr) strategy we predict 8-25 discoveries. Our study of the effects of stellar variability on shallow transits of Earth-like planets illustrates that our estimates of PLATO's planet yield, which we derive using a photometrically quiet star like the Sun, must be seen as upper limits. In conclusion, PLATO's detection of about a dozen Earth-sized planets in the HZs around solar-type stars will mean a major contribution to this yet poorly sampled part of the exoplanet parameter space with Earth-like planets.
