标题： 围绕巴纳德星运行的亚地球质量行星：TESS光度数据中没有凌星证据 显示英文标题

标题： A sub-Earth-mass planet orbiting Barnard's star: No evidence of transits in TESS photometry

摘要： 围绕巴纳德星运行的一颗亚地球质量行星，被指定为巴纳德b，最近已被宣布。 几乎在同一时间，凌日系外行星勘测卫星（TESS）在第80象限发布了巴纳德星的第一批光度数据。 我们探讨了巴纳德b在TESS光度测量中出现凌日的可能性。 去趋势的2分钟光曲线似乎平坦，通量均方根为0.411千分比。 对盲和有指导的凌日曲线模型推断的尝试表明，没有发现巴纳德b或其他天体凌日的证据。 这为巴纳德b的轨道倾角提供了3$\sigma$的上限为87.9度。 显示英文摘要

摘要： A sub-Earth-mass planet orbiting Barnard's star, designated as Barnard b, has been recently announced. At almost the same time, the first photometric data of Barnard's star by the Transit Exoplanet Survey Satellite (TESS) was released in Sector 80. We explore the possibility of emergent transits of Barnard b in TESS photometry. The detrended 2 min light curve appears to be flat, with a flux root mean square of 0.411 parts per thousand. Attempts of blind and informed transit-curve model inference suggest no evidence of transiting Barnard b, or any other body. This provides a 3$\sigma$ upper bound of 87.9 degrees for the orbital inclination of Barnard b.