标题： 系外行星星历变化观测（ExoEcho）。 I. 使用哈勃空间望远镜宽视场相机3数据的三十七颗系外行星凌星时间分析 显示英文标题

标题： Exoplanet Ephemerides Change Observations (ExoEcho). I. Transit Timing Analysis of Thirty-Seven Exoplanets using HST/WFC3 Data

摘要： ExoEcho 项目旨在通过利用来自地面和空间望远镜的高精度凌星时间数据来研究系外行星的光动力学。 一些系外行星正在经历轨道衰减，而凌星时间变化（TTV）是一种研究它们轨道周期变化的有用技术。 在这项研究中，我们从哈勃太空望远镜（HST）观测中获得了 37 颗短周期系外行星的凌星中间时间数据，其中大多数是热木星。 为了搜索样本中的潜在长期和短期轨道周期变化，我们使用线性和二次历元模型进行了 TTV 模型拟合。 我们的分析识别出两颗正在经历强烈周期性衰减的热木星。 鉴于热木星群体宿主恒星的古老年龄，我们的发现需要一个场景，在该场景中热木星（HJs）正在不断被破坏和创造。 我们的研究表明，在未来的研究中将高精度凌星时间数据纳入 TTV 研究的重要性。 显示英文摘要

摘要： The ExoEcho project is designed to study the photodynamics of exoplanets by leveraging high-precision transit timing data from ground- and space-based telescopes. Some exoplanets are experiencing orbital decay, and transit timing variation (TTV) is a useful technique to study their orbital period variations. In this study, we have obtained transit middle-time data from the Hubble Space Telescope (HST) observations for 37 short-period exoplanets, most of which are hot Jupiters. To search for potential long- and short-term orbital period variations within the sample, we conduct TTV model fitting using both linear and quadratic ephemeris models. Our analysis identifies two hot Jupiters experiencing strong periodic decays. Given the old age of the host stars of the hot Jupiter population, our findings call for a scenario where HJs are continuously being destructed and created. Our study demonstrates the importance of incorporating high-precision transit timing data to TTV study in the future.